Exoplanet Stats

[Helio]

There is a nice sudden bump due to TESS, apparently.

Current count is: 5822
No. of likely HZ exos: 163
No. of these with reasonable radius: 46
[I found a hiccup on the G-class coding so there are only 4 found of the 46, not 47 as in the prior post.]

Kepler-452 b

Kepler-22 b

HD 191939 g

tau Cet f

 

[Helio]

Perhaps this will makeup for my little code error:

The following shows you where two of those four are located in the heavens (Cygnus).



Be sure to wave in that direction.

 

[Helio]

I accidentally stumbled on a way to get the entire list of both the confirmed exoplanets as well as the candidate list. [Then I discovered there is a very simple way to do it.]

The total number of exoplanets with candidates bumps to an additional 2,614, as of today, giving a total for both of 8,857.

So if we use strong wishful thinking and pretend these candidates all get confirmed and without data changes (for the worse), then the number of "Earthlike" exoplanets bump from 47 to 111. The number of all exoplanets in their HZ, regardless of size, bumps from 171 to 301.

[Courtesy Exoplanets.eu. The color coding is explained in an earlier post. Questions are welcomed.]

 

[Helio]

 

[Helio]

We are seeing an abundant number of exoplanets become confirmed, and our numbers for those in their HZ are also increasing.

Hats off the astronomers! Almost 1000 new exoplanets have been added to list in only about 1 month. Keep it coming!!!

The following shows that there has been a bump of 3 exoplanets found in their respective HZ, though their radii are not Earth-sized.

 

[Helio]

I was curious regarding the current number of star systems having more than one exoplanet. Here it is...

There are three systems with 7 and one system with 8.

 

[Helio]

Wow, the rate in the increase of confirmed exoplanets is impressive!

The number of exoplanets that are Earth-like in size and in their HZ remains at 47, but there are many more that are larger, especially, that are in their HZ.

For the first time, there are exoplanets found (10) around B-type stars.

 

[Helio]

Wow! We may be only a few days from breaking the 7,000 confirmed exoplanet number.

There is a steady increase in the number of exoplanets in HZs, but there has been no increase in these that are "Earth Sized".

In the last month, there has been an increase of about 50% in the number of HZ exoplanets by star type, with the exception of the F- type stars having a 98% increase (M-type did get bumped by 67%).

 

[Helio]

Of all the exoplanets there is a total of one that seems to be a close match to Earth -- KOI-4878 b. It is the same size as Earth and orbits at the same distance such that it receives the same amount of luminosity from its star. The other planets are usually much larger than Earth, which may, or may not, be an issue for life.

It is located in a conspicuous spot in the sky -- Ursa Major. So the next time you see the Big Dipper, look at this location marked and know it is the first to be so much a possible physical twin.

 

[Helio]

We have reached 50 exoplanets, per my program, that meet the qualifications of both being the their respective HZ and are < 2.5 in radius compared to Earth.

7,055 exoplanets confirmed.

Data from exoplanet.eu:

 

[Helio]

A significant bump brings the exoplanet count to just shy of 7250 exoplanets!

BUT, since at least last Sunday, when attempting to download the data for processing, I'm seeing only a "not working" notice.

It would be appreciated if someone else would try to see if it's more me than them in France. Their contact email link also failed me (Yahoo), but I managed to get an email and sent them a notice last Monday, but no response.

To attempt a download, go here: Exoplanet Download [I click on the "CSV" data download, but none of these links work.]

Thanks.

 

[Helio]

Exoplanet.eu has their catalog download function working again. I noticed they dropped the total confirmed count down by about 80 since my last run, so their downtime may have been for verifications.

As a reminder, Exoplanet.eu allows exoplanet masses to just under 60 Jupiters, explaining their reasoning on their home page. NASA, I assume, restricts their listing to less than this, hence the much lower number of exos in their catalog.

Also, my listing (below) restricts exoplanets to this within the User radius limits, as stated. Radius is estimated if only mass is known, though orbital distance, which gives a better density range, is taken into account. As a result, the first image shows a total HZ count of 197, but only 50 (following images) meet the User's (me) size restrictions.

Of the 50, only one would be a first choice for Ms. Goldilocks, IMO --- KOI 4878b (F-class). It likely has both the same orbital temperature zone and size of Earth.

 

[Helio]

"This research has made use of data obtained from or tools provided by the portal exoplanet.eu of The Extrasolar Planets Encyclopedia."

 

[Helio]

I read in a 2023 book that claimed about 1/3 of star systems (of ~ 3,800) have at least 3 exoplanets.

So, I have enhanced the program to do a current count whenever desired....

free photo hosting

The rate of new exoplanets is now just a trickle, though this will change eventually.

Recall that three observations for things like transits are required in order for an exoplanet to be "confirmed". Thus the longer period exoplanets will trickle in and for sun-like stars, then these can be the more important confirmations. So far, nothing has changed much.

 

[Helio]

For those interested, the following is a breakdown of the number of exoplanets in a system by stellar Type. The numbers are less since the stellar type is missing for quite a number of exoplanets in the data. However, to bump the numbers, if the stellar temp. is known, then I estimate the type.

The second table shows how the results are fairly uniform regardless of stellar type.

As the longer period exos are eventually confirmed, these numbers (and percentages) could change in the next few years.

[Data courtesy of exoplanet.eu]

 

[Helio]

Although the rate of increase in the number of newly discovered exoplanets is at a crawl, there are two new additions to HZ exoplanets that are both orbiting sun-like stars, and they are considered to be Earth-like in size. Note that 82 Eri d is only about 20 lyrs. away.

I've circled the two new-comers. The light blue color shows that they are in the cooler part of the HZ (Solar Equivalent distance is about 1.5 AU).

[I'm saving time by not showing the 35 M-class HZ exoplanets. I'm not optimistic that they will prove likely places for any life, but I'm still tracking them. I'll post them upon request.]

[Oops. I see the Dist. for the K-class is using the Radius value for some strange reason. This will get fixed when I have a few minutes to spare.]

 

[billslugg]

In post #165, on the upper matrix, every row has a hump in the middle, every column decends downward. This is proof of ET. (Just trying to get the jump on the crazies.)

 

[Helio]

G-whizz!

It’s surprising to me that there are far more G type star systems over the M-type, especially there are so many more M-type stars. Transits are, I think, easier to find for M-type, too.

 

[Helio]

Here is the corrected table of values (dist., surf. g, esc. vel.) for the K-Type star exoplanets, as mentioned above needing the fix.

 

[ImmortalMelvz]

Please give us a summary of the most habitable exoplanet, thanks!

 

[Helio]

Here is the current "summary".



The prior post shows actual planet names for all but the M-type stellar systems.

 

[Helio]

Per Unclear Engineer's ideas here, I have managed to gather some information that may be helpful.

Of the 7300 exoplanets, there are a little over 1000 multi-exo systems. A little over half of these have stated masses for all the exos.

The number pattern, based off the table shown (my own mass ranges), is the exo mass type from the innermost to the outermost exo. [I left out the systems with only two planets, given their greater number.]

 

[Unclear Engineer]

Helio,

I am just getting to this thread, jumping-in on your link in the "super earth beyond mars" thread.

In that other thread, I was trying to understand if planetary systems will always have their rocky planets with thin atmospheres (if there are any) orbiting closer to their stars than any gas giant planets in the same system.

The reason I am wondering about that is the reports of "hot Jupiter" type planets around some stars, which makes it sound like they are pretty close to their stars.

So my question is whether we know of any more earth-like planets that orbit their stars outside the orbits of any "hot Jupiters". That would mean rocky planets with relatively thin atmospheres in or near the habitable zone for the star, excluding any ice planets like Pluto, where the molecules that make up atmospheres in the habitable zone have condensed onto the surface is ices of CO2, methane, etc.

 

[Helio]

Ok. I knew there was a bigger picture to look at, but I was able to establish the above size-distance order so I decided to toss it in here first as new fodder.

Now I’ll take this work and get the solar Eq. distance, which is necessary for the rocky determination. There are many systems, however, that lack the needed stellar radial size and temperature needed to calculate luminosity. This was another reason I posted the above list.

Given all the other irons in the fire, this may take a few days. But I enjoy the programming challenge.

 

[Unclear Engineer]

Helio, thanks for all of your work. There is no need to rush your effort to answer the questions that I asked - I'm patient and appreciative of your knowledge and effort.