2008 Orionid meteor shower peaked October 21

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MeteorWayne

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<ol style="margin-top:0in"><li class="MsoNormal" style="margin-top:0in;margin-left:0in;margin-right:0in;tab-stops:list.5in"><font face="Times New Roman" size="3">ORI-Halley&rsquo;s Comet Dust Returns Again&hellip;</font></li></ol><font face="Times New Roman" size="3">&nbsp;</font> <p style="margin-top:0in;margin-left:0in;margin-right:0in" class="MsoNormal"><font face="Times New Roman" size="3">The major Orionid meteor shower will be a challenge in 2008 considering the position and timing of the first quarter moon. However, during the last two years activity has been 2 to 3 times normal and modeling has indicated such enhanced rates may continue for another few years. So despite the moon, we should make an effort to monitor it.</font></p><font face="Times New Roman" size="3">&nbsp;</font> <p style="margin-top:0in;margin-left:0in;margin-right:0in" class="MsoNormal"><font face="Times New Roman" size="3">The Orionids are one of two annual showers created by Halley&rsquo;s comet. The eta- Aquarids in May occur when the Earth impacts outbound particles, while the Orionids sample the incoming particles of the same stream. The Orionids approach the solar system from below and are visible after about 10 PM. However, a useful radiant elevation for scientific data does not occur until after midnight. Unfortunately, this year the 65% illuminated moon rises only about an hour later than the radiant on the peak morning of the 21<sup>st</sup>, and is only 15 degrees away. As I said, it&rsquo;s a challenge. The best advice I can give is to try and keep the moon behind a building or umbrella, and place your field of view to the west in southwestern Taurus, or even Cetus. The radiant is about halfway between Betelgeuse and the feet of Gemini, well above the main rectangle of Orion&rsquo;s 4 corner stars. The moon will rise a little later the next morning (Oct 22), so there will be a bit more dark sky time, and more distance between Luna and the radiant. That also means that the nights before the peak will be even worse. On the morning of the 20<sup>th</sup> (night of the 19<sup>th</sup>) the 75% full moon will rise before the radiant. If I may say so, yuck!! However the Orionid above normal rates have lasted nearly 5 days in the last two years, and each night the moon rises later, so during the morning hours by midweek, quite a few could be seen.</font></p><font face="Times New Roman" size="3">&nbsp;</font> <p style="margin-top:0in;margin-left:0in;margin-right:0in" class="MsoNormal"><font face="Times New Roman" size="3">Fortunately, the Orionids are bright, so you can attempt some data collection even on the moonlit nights; however with such a bright moon in the sky, the limiting magnitude polygons that the IMO and NAMN use will not help define the brightness of the sky with much precision. Make an extra effort to count the areas you use near your field of view with as much detail as you can. </font></p><font face="Times New Roman" size="3">&nbsp;</font> <p style="margin-top:0in;margin-left:0in;margin-right:0in" class="MsoNormal"><font face="Times New Roman" size="3">Recent IMO video data has shown low but steady activity from the Orionids as early as the beginning of September lasting until late November! In future years this will need to be taken into account. Outside of the IMO visual radiant period listed below I have shown the video indicated positions. To add to the fun, a second nearby radiant has show up that parallels the ORIs. I have listed them as XGE in the position charts below. This extends only from the 16<sup>th</sup> (in the Full Moon whiteout) to the 25<sup>th</sup>. While it will be difficult, there&rsquo;s still plenty to be gained by making and reporting careful observations this year.</font></p><font face="Times New Roman" size="3">&nbsp;</font> <p style="margin-top:0in;margin-left:0in;margin-right:0in" class="MsoNormal"><font face="Times New Roman" size="3">ORI- Orionids velocity 66 km/sec (very fast) </font></p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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weeman

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Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>ORI-Halley&rsquo;s Comet Dust Returns Again&hellip;&nbsp; The major Orionid meteor shower will be a challenge in 2008 considering the position and timing of the first quarter moon. However, during the last two years activity has been 2 to 3 times normal and modeling has indicated such enhanced rates may continue for another few years. So despite the moon, we should make an effort to monitor it.&nbsp; The Orionids are one of two annual showers created by Halley&rsquo;s comet. The eta- Aquarids in May occur when the Earth impacts outbound particles, while the Orionids sample the incoming particles of the same stream. The Orionids approach the solar system from below and are visible after about 10 PM. However, a useful radiant elevation for scientific data does not occur until after midnight. Unfortunately, this year the 65% illuminated moon rises only about an hour later than the radiant on the peak morning of the 21st, and is only 15 degrees away. As I said, it&rsquo;s a challenge. The best advice I can give is to try and keep the moon behind a building or umbrella, and place your field of view to the west in southwestern Taurus, or even Cetus. The radiant is about halfway between Betelgeuse and the feet of Gemini, well above the main rectangle of Orion&rsquo;s 4 corner stars. The moon will rise a little later the next morning (Oct 22), so there will be a bit more dark sky time, and more distance between Luna and the radiant. That also means that the nights before the peak will be even worse. On the morning of the 20th (night of the 19th) the 75% full moon will rise before the radiant. If I may say so, yuck!! However the Orionid above normal rates have lasted nearly 5 days in the last two years, and each night the moon rises later, so during the morning hours by midweek, quite a few could be seen.&nbsp; Fortunately, the Orionids are bright, so you can attempt some data collection even on the moonlit nights; however with such a bright moon in the sky, the limiting magnitude polygons that the IMO and NAMN use will not help define the brightness of the sky with much precision. Make an extra effort to count the areas you use near your field of view with as much detail as you can. &nbsp; Recent IMO video data has shown low but steady activity from the Orionids as early as the beginning of September lasting until late November! In future years this will need to be taken into account. Outside of the IMO visual radiant period listed below I have shown the video indicated positions. To add to the fun, a second nearby radiant has show up that parallels the ORIs. I have listed them as XGE in the position charts below. This extends only from the 16th (in the Full Moon whiteout) to the 25th. While it will be difficult, there&rsquo;s still plenty to be gained by making and reporting careful observations this year.&nbsp; ORI- Orionids velocity 66 km/sec (very fast) <br />Posted by MeteorWayne</DIV><br /><br />Thank you for the info! I will make sure to brew a pot of coffee in the morning for the nights that I'm up late watching for these guys. <img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-wink.gif" border="0" alt="Wink" title="Wink" /> <div class="Discussion_UserSignature"> <p> </p><p><strong><font color="#ff0000">Techies: We do it in the dark. </font></strong></p><p><font color="#0000ff"><strong>"Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.</strong><strong>" -Albert Einstein </strong></font></p> </div>
 
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shuttle_guy

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Thank you for the info! I will make sure to brew a pot of coffee in the morning for the nights that I'm up late watching for these guys. <br />Posted by weeman</DIV></p><p>I should be able to leave the firing room console to take a break and look for Orionids. Thanks for the post MW.</p><p><br /><br />&nbsp;</p> <div class="Discussion_UserSignature"> </div>
 
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MeteorWayne

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<p>Quick update..</p><p>I was out this morning for 4.45 hours. Despite the moon rising at the same time as the radiant, the sky was amazingly clear except for the last hour. It was also the first frost of the year, a light coating on my sleeping bag, and full coverage on the ground when I got home. </p><p>Overall 29 Orionids, 3 epsilon Geminids, 3 each Northern and Southern Taurids, and 10 sporadic meteors.</p><p>Tonight the radiant will rise before the moon so if it stays clear, might be a little better.</p><p>Also saw one of the fastest moving satellites I have ever witnessed; it surely is an object that will reenter within the next few weeks. The average angular velocity was nearly 2 degrees a second; it was haulin the mail!!</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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MeteorWayne

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<p>Morning of October 21st update:</p><p>I almost didn't go out, that would have been a mistake! At midnight EDT, thin <br />cirrus were prevelent, and with the moon I wasn't optimistic. They continued to <br />be a minor annoyance (mostly reducing LM). They went away entirely after about <br />3AM EDT, the rest of the night was clear and dry enough that even the rising <br />moon wasn't too much of a problem. LM ranged from about 5.4 through the cirrus <br />early to about 5.7 before the moon brought it down again.<br /><br />All in all, 5.25 hours Teff. 84 total meteors. UT 0446-1005<br />58 ORI, 3 EGE, 3 XGE, 3 NTA, 1 STA, 1 LMI (only observed last 3 hours), 15 SPO.<br /><br />Rates higher than yesterday morning.<br /><br />Highlight was an (at least)&nbsp; -12 Orionid Fireball at ~ 8:56 UT. From here <br />Azimuth~ 240, elevation ~ 15 - /> 10 degrees. If anyone was observing to my <br />southwest (George Gliba?) it must have been a spectacular sight. Left a wide <br />orange train ~ 3 seconds. The -12 (or more) was in a bright terminal burst that <br />lit up the entire landscape brighter than the moon.<br /><br />Another highlight was a pair of simultaneous Orionids about 8 degrees apart. Often simultaneous meteors <br />just overlap in time, these occurred right next to each other within 1 tenth <br />second start and end times.<br /></p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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weeman

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Morning of October 21st update:I almost didn't go out, that would have been a mistake! At midnight EDT, thin cirrus were prevelent, and with the moon I wasn't optimistic. They continued to be a minor annoyance (mostly reducing LM). They went away entirely after about 3AM EDT, the rest of the night was clear and dry enough that even the rising moon wasn't too much of a problem. LM ranged from about 5.4 through the cirrus early to about 5.7 before the moon brought it down again.All in all, 5.25 hours Teff. 84 total meteors. UT 0446-100558 ORI, 3 EGE, 3 XGE, 3 NTA, 1 STA, 1 LMI (only observed last 3 hours), 15 SPO.Rates higher than yesterday morning.Highlight was an (at least)&nbsp; -12 Orionid Fireball at ~ 8:56 UT. From here Azimuth~ 240, elevation ~ 15 - /> 10 degrees. If anyone was observing to my southwest (George Gliba?) it must have been a spectacular sight. Left a wide orange train ~ 3 seconds. The -12 (or more) was in a bright terminal burst that lit up the entire landscape brighter than the moon.Another highlight was a pair of simultaneous Orionids about 8 degrees apart. Often simultaneous meteors just overlap in time, these occurred right next to each other within 1 tenth second start and end times. <br />Posted by MeteorWayne</DIV><br /><br />The -12 sounds like it was a monster! I want to catch as much of the show as possible. Unfortunately, between school and work almost every day, any sleep I can get is very precious! </p><p>When is the peak supposed to taper off? </p> <div class="Discussion_UserSignature"> <p> </p><p><strong><font color="#ff0000">Techies: We do it in the dark. </font></strong></p><p><font color="#0000ff"><strong>"Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.</strong><strong>" -Albert Einstein </strong></font></p> </div>
 
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weeman

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Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>The -12 sounds like it was a monster! I want to catch as much of the show as possible. Unfortunately, between school and work almost every day, any sleep I can get is very precious! When is the peak supposed to taper off? <br />Posted by weeman</DIV><br /><br />ps- MW, when did you become a Mod!? <div class="Discussion_UserSignature"> <p> </p><p><strong><font color="#ff0000">Techies: We do it in the dark. </font></strong></p><p><font color="#0000ff"><strong>"Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.</strong><strong>" -Albert Einstein </strong></font></p> </div>
 
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MeteorWayne

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>The -12 sounds like it was a monster! I want to catch as much of the show as possible. Unfortunately, between school and work almost every day, any sleep I can get is very precious! When is the peak supposed to taper off? <br />Posted by weeman</DIV><br /><br />Well based on decades of history, it's already passed. However based on the last 3 years (including this one) there are one or two more "above the normal peak rate" mornings. This and the last two (and maybe the next two) years have had far higher rates than in many decades. Recent math analysis has shown that such elevated rates a few days either side if the peak could last another year or two.</p><p>Like I say (too often) meteor showers are like a box o' chocolates. You never know what you will get unless you look!</p><p>Psycho Meteor Dude Wayne</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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MeteorWayne

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<p>Morning of October 23rd:</p><p>&nbsp;</p><p>Good rates continued this morning, though that was aided by not having to battle <br />the moon in eye to eye combat. Rates were comparable to the morning of the 21st. <br />Observed from 0623-1008 UT (0223-0610 EDT) 3.75 Teff. LM was very good for NJ <br />all night (haven't processed exact readings yet.), only a slight decline as the <br />moon rose higher and twilight dawned.<br /><br />71 Total meteors 43 ORI, 5 EGE, 4 STA, 3 NTA, 2 XGE, 14 SPO. Best hour had 16.<br /><br />Nice slowly varying satellite from +3 to invisible with 10-15 second period <br />about 5:15 EDT, and as I got out of the car at home did a quick sky scan and saw <br />a fine 30 degree elevation pass of the ISS at 6:26. Didn't even know it was <br />going the be visible! Of course I waved at the crew as usual.<br /><br />Full report later.<br /><br />I have chewed on the obs from the 19/20 and 20/21 and will be ready to post <br />those full reports later after I get some shuteye. (Both are already in online <br />IMO database).<br /><br />WaYAWNe</p><p><br />IMO On-the-Fly data with ZHR graph</p><p>http://www.imo.net/live/orionids2008/</p><p>So far shows a peak of 39 +/-2 around 0947 UT on the morning of the 21st.</p><p>Based on 1434 Orionids in 313 data intervals from 32 observers in 14 countries.</p><p>For the science geeks, here is my on-line report of that peak morning:</p><p>http://umdb.urania.be/v2/obsview/view.php?id=4106</p><p>Wayne</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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MeteorWayne

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<p>Not sure if anyone is interested, but here's my full summary of the Orionid peak nights with more detail than the quick ones.:</p><p>This is the first of 4 posts today with more detailed summaries of the <br />observations for the nights surrounding the Orionid peak.<br /><br />This information applies to all 4 mornings.<br /><br />Observations were made at the NJAA Observatory. 74:53:54 W 40:40:52 N Elev 253 <br />meters.<br />All data recorded on audio tape, so no data recording downtime. Any discepency <br />between elapsed time and Teff is due to the occasional "natural" break.<br /><br />Shower association was made using an alignment cord and knowledge of the shower <br />velocity. This is especially important since many of the showers are close <br />together (such as the two Taurid radiants),&nbsp; in the same general area close to <br />the moon (ORI,EGE,XGE) or at the edge of the FOV (LMI).<br />I found it an essential tool in accurately identifying many shower members.<br /><br />In general, my field of view was between SSE and SSW at ~ 60 degrees elevation. <br />When the moon was directly overhead I lowered that somehwat and shifted a bit <br />away from the moon in Azimuth.<br /><br />All meteor times and magnitudes were recorded to the minute, more detailed intervals and magnitude distributions are <br />available on request. At the end of each I will include a link to the data in <br />the IMO online database which includes shorter intervals and full magnitude <br />distributions.<br /><br />F=1.00 for all observations (that means there were no thick clouds or other obscuration to the field of view). On the occasions where there were clouds, they were <br />very thin cirrus and only caused a reduction in LM, and are reflected in the <br />recorded LM numbers. (LM= Limiting Magnitude; i.e. what&nbsp;are the faintest stars that can be seen)<br /><br />Shower XGE is # 64 from Sirko Molau's 2006 analysis of IMO video data (velocity <br />59 km/sec).<br /><br />A "/" in shower data for LMI indicates that the radiant was either below the <br />horizon of in a position where it could not be monitored even using the <br />alignment cord.<br /><br />===========================<br /><br />UT Date October 20, 2008 (Observations 00:06-6:02 EDT)<br /><br />Showers RA Dec<br />ORI 094&nbsp; +16<br />NTA 038&nbsp; +18<br />STA 040&nbsp; +12<br />EGE 104&nbsp; +27<br />LMI 158 +39<br />XGE 107 +11<br />(XGE-None observed this morning so omitted from summary below)<br /><br />UT Time&nbsp;&nbsp;&nbsp;&nbsp; Teff&nbsp;&nbsp;&nbsp; &nbsp;LM ORI&nbsp; NTA &nbsp;STA&nbsp; EGE&nbsp; LMI&nbsp; SPO&nbsp;&nbsp;&nbsp; Tot&nbsp; Met/Hr Ori/Hr<br />0406-0537 1.45 +5.70&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 15&nbsp;&nbsp; 10.3&nbsp;&nbsp; 5.5<br />0537-0637 1.00 +5.67&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp; 10.0&nbsp;&nbsp; 6.0<br />0637-0737 1.00 +5.63&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 12&nbsp;&nbsp;&nbsp; 12.0&nbsp;&nbsp;&nbsp;6.0<br />------------<br />0902-1002 1.00 +4.90&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 11&nbsp;&nbsp; 11.0&nbsp;&nbsp; &nbsp;9.0<br />-----------------------------------------------<br />0406-1002 4.45&nbsp; +5.49&nbsp; 29&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp; 48&nbsp;&nbsp; 10.8&nbsp;&nbsp; &nbsp;6.5<br /><br />This was really a story of three nights in one. The first 1.45 Teff, from <br />0406-0537 had exceptionally clear skies considering the 62% illuminated moon <br />rising near the radiant. I have observed under worse conditions on many moonless <br />nights. This period featured very dim Orionds. Their average magnitude was only <br />+3.63! The brightest was only a +1.5, while the largest bin was +4.<br /><br />After 0737, the charachter of the Orionids changed dramatically. The average <br />magnitude of the Orionids for the next 2 hours was +0.67! This included 3&nbsp;Zero magnitude <br />or brighter and the dimmest only +3. The largest magnitude bin was +2.<br /><br />At the end of this period, a thicker layer of cirrus overspread the area which, <br />being lit by the moon, stopped observations.<br /><br />The final hour before dawn was with the moon nearly overhead and hazier skies, <br />so the LM was very bad. Still, there was a good number of Orionids, with a peak <br />of 7 occurring in the 15 minutes between 0937 and 0951. Average ORI mag for this <br />hour was +2.33<br /><br />Totals<br /><br />48 Total Meteors&nbsp; (10.8/Hr) Avg Mag +2.39<br /><br />29 ORI (6.5/Hr) Avg Mag +1.98<br />3 NTA (0.7/Hr) Avg Mag +1.5<br />3 STA (0.7/Hr) Avg Mag +2.5<br />3 EGE (0.4/hr) Avg Mag +1.2 (First meteor of night was a long -3 EGE)<br />10 SPO (2.2/Hr) Avg Mag +3.00<br /><br />Full IMO reports can be viewed here:<br /><br />First 3.45 Teff<br />http://umdb.urania.be/v2/obsview/view.php?id=4100 <br /><br />Last Hour Teff:<br />http://umdb.urania.be/v2/obsview/view.php?id=4101<br /><br />Wayne</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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MeteorWayne

Guest
<p>OK, here's the next (peak) morning. The IMO On-the-Fly ZHR graph based on <br />worldwide data:<br /><br />http://www.imo.net/live/orionids2008/<br /><br />shows that the peak occurred toward the end of my observation period. I have not <br />processed my observations far enough to calculate ZHR's yet. This is the raw <br />data. The header describing the conditions of the obs are in the previous <br />message, so I will cut to the chase.<br /><br /><br />UT Date October 21, 2008 (Observations 00:46-6:05 EDT)<br /><br />Showers RA Dec<br />ORI 095&nbsp; +16<br />NTA 039&nbsp; +18<br />STA 041&nbsp; +12<br />EGE 105&nbsp; +27<br />LMI 159 +39<br />XGE 106 +11<br /><br /><br />UT Time&nbsp;&nbsp;&nbsp;&nbsp; Teff&nbsp;&nbsp;&nbsp; LM ORI NTA STA EGE LMI XGE SPO Tot </p><p>Met/Hr Ori/Hr<br />0446-0601 1.25 +5.64&nbsp; 12&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 19&nbsp;&nbsp;&nbsp; <br />15.2&nbsp;&nbsp;&nbsp; 9.6<br />0601-0701 1.00 +5.38&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 15&nbsp;&nbsp;&nbsp;&nbsp; <br />15.0&nbsp;&nbsp;&nbsp; 9.0<br />0701-0803 1.00 +5.58&nbsp; 18&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 23&nbsp;&nbsp;&nbsp; <br />23.0&nbsp;&nbsp;&nbsp; 18.0<br />0803 0903&nbsp; 1.00 +5.42&nbsp; 11&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16&nbsp;&nbsp;&nbsp; <br />16.0&nbsp;&nbsp;&nbsp;&nbsp; 11.0<br />0903-1005 1.00 +5.40&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 11&nbsp;&nbsp;&nbsp; </p><p>11.0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8.0<br />-------------------------------<br />0446-1005 5.25 +5.49&nbsp; 58&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 12&nbsp;&nbsp;&nbsp;&nbsp; 84&nbsp;&nbsp;&nbsp; </p><p>16.0&nbsp;&nbsp;&nbsp;&nbsp; 11.0<br /><br />There were very thin cirrus reducing LM early. After 0718 it was very clear, <br />although encroaching moon did reduce LM somewhat. LMIs only counted after 0646.<br /><br />Two outstanding events. At 0521 UT two simultaneous Orionids occurred separated <br />by only about 8 degrees. Most "simultaneous" meteors just overlap in time; in <br />this case, they really did occur right next to each other at the same time in <br />the sky. That seemed to shut off the Orionid pipeline for a while, as rates <br />dropped right afterward.<br /><br />The other was the -12 bolide I have referred to. So far there are 3 other <br />reports of this that I know of. I estimated it at -12 (a terminal burst) it <br />could have been brighter. That was at 0856 UT.<br /><br />One fact that my preliminary analysis has shown is that there appears to be a <br />distinct periodicity to the Orionid rates during ths morning. My highest rate was about 0755 UT, and peaks occurred for two <br />periods ~ 56 minutes both earlier and later. The range was 50-61 minutes. The <br />minima period ranged from 41-76 minutes. It will take some more time to finish <br />the analysis of this phenomena; I'll add a follow up message later when I have <br />finished. I have also not completed ZHR calcs. Once again, raw data here.<br /><br />I didn't see much variation in the population index (ratio of bright to faint <br />meteors) in the Orionids this morning. While there was some (perhaps higher r, <br />i.e. fainter Orionids) ) during the first period, none of it was as distinct as <br />the clear different regimes the previous morning.<br /><br />My impression was that this year's ZHR was lower than the last two years. While <br />2006 and 2007 produced rates at least twice the long term average, this year <br />seemed to be only about 60% higher than normal. Again, I have not completed that <br />part of the analysis, so this is just an impression so far. I could be wrong due <br />to the moon induced reduction in LM. More on that in a few days.<br /><br />Highest 6 and 15 minute rates were at 0755 UT, 30 minute rate peaked at ~ 0748. <br />Highest hourly rate was centerd at 0727.<br /><br />Totals:<br /><br />84 Total meteors (16.0/Hr) Average Magnitude +1.96 (rather bright)<br /><br />58 ORI (11.0/Hr) Average Magnitude +1.76<br />3 NTA (0.6/Hr) Avg Mag +2.0<br />1 STA (0.2/Hr) Mag +4<br />3 EGE (0.6/Hr) Avg mag +1.5<br />1 LMI (0.2/Hr) Mag +1 (A very nice and distunctive meteor ~25 degrees long with <br />a 1 second train)<br />3 XGE (0.6/Hr) Avg Mag +3.0<br />15 SPO (2.9/Hr) Avg Mag +2.57<br /><br />More detailed report can be seen here:<br /><br />http://umdb.urania.be/v2/obsview/view.php?id=4106<br /><br /><br />Wayne</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
E

eosophobiac

Guest
<p>Thanks for these updates, MeteorWayne.&nbsp; I had to participate 'by proxy' this year, due to some family stuff going on, but I was out there meteor-gazing in spirit!&nbsp; </p><p>I usually try to catch some of the&nbsp;brighter/bigger showers,&nbsp;and I think I'm getting better at&nbsp;knowing the different areas of the sky and determining where a meteor originates from, that I'm (almost) confident enough to&nbsp;annotate some of the not-as-bright showers....&nbsp; Hmmm.&nbsp; Let me think on that!</p><p>Anyway, thanks again for sharing.&nbsp; </p><p>And congrats on&nbsp;the moderator-ship!&nbsp; <img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-smile.gif" border="0" alt="Smile" title="Smile" />&nbsp;&nbsp;&nbsp; </p><p>&nbsp;</p> <div class="Discussion_UserSignature"> <p> </p><p> </p> </div>
 
M

MeteorWayne

Guest
<p>&nbsp;have decided to combine the two days in one post, since the morning of the <br />24th only lasted an hour due to cirrus from a storm forming to our south.<br /><br /><br />Previous header info applies for obs at the NJAA.<br /><br /><br />UT Date October 23<br /><br />UT Time&nbsp;&nbsp;&nbsp;&nbsp; Teff&nbsp;&nbsp;&nbsp; LM&nbsp; ORI&nbsp; &nbsp;NTA&nbsp; STA&nbsp;&nbsp; EGE&nbsp;&nbsp; XGE&nbsp; &nbsp;SPO &nbsp;TOT <br />Met/Hr ORI/Hr<br />0623-0735 1.20 +5.76&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 23&nbsp;&nbsp;&nbsp; <br />19.2&nbsp;&nbsp; 7.5<br />0735-0756 0.35 +5.78&nbsp; 11&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 12&nbsp;&nbsp;&nbsp; <br />37.1&nbsp;&nbsp; 31.4<br />0756-0908 1.20 +5.68&nbsp; 11&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 19&nbsp;&nbsp;&nbsp; <br />15.8&nbsp;&nbsp;&nbsp; 9.2<br />0908-1008 1.00 +5.64&nbsp; 12&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16&nbsp;&nbsp;&nbsp; <br />16.0&nbsp;&nbsp;&nbsp; 12.0<br />------------------<br />0623-1008 3.75 +5.71&nbsp; 43&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp; 14&nbsp;&nbsp;&nbsp;&nbsp; 71&nbsp;&nbsp;&nbsp; <br />18.9&nbsp;&nbsp;&nbsp; 11.5<br /><br />30% illum moon, rising from 7 to 46 degrees elevation. Reduced LM toward <br />morning.<br />10 Orionids has trains = /> 1 sec. 1 LMI did as well.<br /><br />Total 71 meteors (18.9/Hr) Avg mag +2.54<br /><br />43 Orionids (11.5/Hr) Avg Mag +2.14<br />ORI 0623-0735 (9) Avg Mag +2.61<br />ORI 0735-0756 (11) Avg Mag +2.05<br />ORI 0756-0908 (11) Avg Mag +1.41<br />ORI 0908-1008 (12) Avg Mag +2.54<br /><br />14 SPO (3.7/Hr) Avg Mag +3.39<br />5 EGE (1.3/Hr) Avg Mag +2.40<br />4 STA (1.1/Hr) Avg Mag +2.75<br />3 NTA (0.8/Hr) Avg Mag +2.75<br />2 XGE (0.5/Hr) Avg Mag +4.25<br /><br /><br />UT Date Oct 24<br /><br />No LMI seen, they were looked for<br /><br />UT Time&nbsp;&nbsp;&nbsp;&nbsp; Teff&nbsp;&nbsp;&nbsp; LM ORI&nbsp;&nbsp; NTA&nbsp;&nbsp; STA&nbsp; &nbsp;EGE &nbsp;XGE&nbsp; &nbsp;SPO&nbsp;&nbsp; TOT (1 hour total)<br />0726-0826 1.00 +5.66&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp; 18<br /><br />Moon a minor factor this morning. Very this cirrus reduced LM at start, and <br />solid cirrus layer ended session.<br /><br />18 meteors, Avg Mag +2.75<br /><br />8 ORI, Avg Mag +2.50<br />5 SPO Avg Mag +4.00<br />3 NTA Avg Mag +2.1<br />1 EGE Mag +1<br />1 XGE Mag +2</p><p>MW</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
A

aphh

Guest
<p>I accidentally saw a bright yellow fireball last night.</p><p>I was minding my business early in the night, when I happened to look up. Suddenly a yellow fireball descended from the skies and headed to the western horizon leaving a flaming trail for about 2 seconds.</p>
 
M

MeteorWayne

Guest
<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>I accidentally saw a bright yellow fireball last night.I was minding my business early in the night, when I happened to look up. Suddenly a yellow fireball descended from the skies and headed to the western horizon leaving a flaming trail for about 2 seconds. <br />Posted by aphh</DIV><br /><br />Most likely it was a Taurid Fireball, since the Orionids have faded out quite a bit. SO far, there have been quite a few Taurid Fireball reports this year. See the Fireball story on the SDC main page.</p><p>&nbsp;</p><p>MW</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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