Another tiny asteroid zipping by--2008 BC 15

MeteorWayne · Jan 30, 2008

This is a just discovered, small (12-27 meter) asteroid. Miss distance 0.0020 AU, 0.8 Lunar distance at 1300 UT Jan 31, about 10 hours from now. # obs. used (total) 20 first obs. used 2008-01-30 last obs. used 2008-01-30 planetary ephem. DE405 SB-pert. ephem. SB405-CPV-2 quality code 9 fit RMS .64705 data source ORB producer Otto Matic solution date 2008-Jan-30 09:50:06 Additional Information Earth MOID = .00122641 AU T_jup = 3.246 It will not get brighter than mag +15 from earth. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

commander_khashoggi · Jan 31, 2008

Another one I shall miss, then....<img src="/images/icons/frown.gif" /> <div class="Discussion_UserSignature"> "If it's planned, it's boring." - Freddie Mercury </div>

MeteorWayne · Jan 31, 2008

At least it missed us <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

commander_khashoggi · Jan 31, 2008

xD Thankfully.<img src="/images/icons/laugh.gif" /> <div class="Discussion_UserSignature"> "If it's planned, it's boring." - Freddie Mercury </div>

123glory · Jan 31, 2008

Post deleted by 123glory

123glory · Jan 31, 2008

No, this object has not come yet...MW says it'll come in about 8 hours. But, a few days ago, I saw somewhere this thing has passed us? What's going on here? Something is fishy??? I believe I saw it listed a few days ago at Tom's Asteroid Flybys... Seriously, something maybe fishy...I really saw this object listed on Tom's Ateroid Flyby page days ago and it was supposed to flew past earth days ago. How come it's still here now and just now Nasa lists it? And it's not on Tom's page anymore either. something just isn't right...can someone please explain? Also, on the JPL projection page, it puts the closest approach on February 1 at .006 AU (558,000) miles, roughly 2 LD. But the Impact risk page put the close approach date as january 31 at .8 lunar distance. That's a BIG difference in the distance. What's going on?

cyclonebuster · Jan 31, 2008

A fragment from 2007 tu24???

cyclonebuster · Jan 31, 2008

http://neo.jpl.nasa.gov/risk/2008bc15.html

cyclonebuster · Jan 31, 2008

http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2008+BC15;orb=1

MeteorWayne · Jan 31, 2008

You are confused. The one that went by the other day was 2007 TU24. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

MeteorWayne · Jan 31, 2008

No, it's in a completely different orbit; not even close. And as you pointed out 2008 BC15 has made the rsik page, with very small chances of impacting earth in 2072 and 2094, however it's not a very large object. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

cyclonebuster · Jan 31, 2008

Orbit program has it on the other side of the sun in 2072 July 23rd and near Jupiter in 2094 July 22nd and today doesn't even make the impact risk with just .0019AU "Close Approach" at 1300. Go figure? 20 observations in just a half day so far.

cyclonebuster · Jan 31, 2008

Harvard has it. http://hea-www.harvard.edu/~fine/Astro/flybys.cgi

MeteorWayne · Jan 31, 2008

cyclonebuster: As stated in the disclaimer right above the orbit program, you cannot use the applet for decades in the future, so that projection, while entertaining, is useless. "Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system." <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

adrenalynn · Jan 31, 2008

Man, didn't you just post that a few days ago with the second half of it highlighted? I coulda sworn it was familiar, in some haunting sorta way. <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

MeteorWayne · Jan 31, 2008

{thunk,thunk,thunk} <img src="/images/icons/wink.gif" /> <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

123glory · Jan 31, 2008

No MW, I wasn't mistaking BC 15 with TU24. I noticed it on Tom's Asteroid Flyby page (http://hea-www.harvard.edu/~fine/Astro/flybys.cgi?start=2007-04-06&sort=min_dist) But now I see it's back up there. I remember it was listed as either less than a lunar distance or two. It was 2008 B...could have been BC or BE instead of BC 15. Oh well, whatever the problem was, I guess I'll never know and it doesn't matter as long as it doesn't impact...

adrenalynn · Jan 31, 2008

Someone wake up TPTB@SDC. We *really *really* *REALLY* need a "beat head against wall" emoticon... <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

MeteorWayne · Jan 31, 2008

We used to have a "beating a dead horse" one or two. <img src="/images/icons/smile.gif" /> I still think ??123 was confused, but maybe his source was. I'll reread the exact posts, then comment here: I have posted everything I have learned as soon as I learned it. All the sources are available, I don't post them because many others do. If anyone wants the latest data and can't find the links, just ask and they shall be supplied. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

adrenalynn · Jan 31, 2008

I wasn't referring to Glory - I was referring to the multiple repost of the 2-body solution notice/warning/caution <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

MeteorWayne · Jan 31, 2008

It got to be 2008 BC 15, since that's the closest approach in quite a while 0.8 Lunar Distance). See the thread in SS&A on 2007 VK184 et al for some links to the other objects of interest. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

MeteorWayne · Jan 31, 2008

I realized that, how many times do you have to repeat the same warnings?? <img src="/images/icons/rolleyes.gif" /> Some people will never expend the effort to understand orbital dynamics. 123 glory was not who I was directing the comment toward. I still think he/she got confused, or the link he/she referred to got confused. But that is different than my reply to cyclonebuster, which is the one that thunks. As I've stated before, I go right to neo.jpl and NEODys so there is no chance of a transcription error. MW <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

adrenalynn · Jan 31, 2008

The beauty (crime?) is that you don't need to understand anything about orbital dynamics/physics. You really only have to grasp the statement: "Don't use this tool. In fact, stop looking at this page. Really. I mean it. Shoo. Go away. Scat. Ya botherin' me kid, I said ya botherin' me, now Scram." <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

MeteorWayne · Jan 31, 2008

The latest accurate data is available under the Horizons link. It's called an Ephemeris. Of course, 65 years from now, that too will be innacurate, as the osculating orbital elements change. But to assume that the orbit animation is accurate while ignoring the disclaimer printed right above it.... Sheesh. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

MeteorWayne · Jan 31, 2008

I don't find Tom's page particularly useful. Good for people who want to get overly excited, though. I link to the source he uses, and another 2, so can monitor everything at once as new data comes in. Since this is not an absolute science, it's good to look at multiple sources. MW <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

Another tiny asteroid zipping by--2008 BC 15

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