ELW bucket list

efoo

efoo
Commander NOODLE74 here. Haven't posted my discovery of new ELWs in this thread yet so here we go:

Dryooe Prou YI-Q c6-204 C 5
Dryooe Prou YI-Q c6-204 C 5.jpg


Agnairt AZ-Z d3182 ABC 4
Agnairt AZ-Z d3182 ABC 4.jpg


Stuemoae MH-D c12-1571 A 3
Stuemoae MH-D c12-1571 A 3.jpg


Stuemoae MH-D c12-1571 A 4
Stuemoae MH-D c12-1571 A 4.jpg


Byoomiae MT-G d11-8841 8
Byoomiae MT-G d11-8841 8.jpg


Nyeajaae UR-Z b5-9 B 2
Nyeajaae UR-Z b5-9 B 2.jpg


Phroi Pri VD-V c5-7472 3
Phroi Pri VD-V c5-7472 3.jpg


Phroi Pri VD-V c5-7472 4
Phroi Pri VD-V c5-7472 4.jpg


Wrupaea JA-C d14-873 B 2
Wrupaea JA-C d14-873 B 2.jpg


Chraisue PN-I c23-3 2
Chraisue PN-I c23-3 2.jpg
 
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Anticon

Anticon
Crazy ridiculously impossible! Only IRL however, cos in ED an ELW is merely one with a human-breathable atmosphere. Anyway, in-game I'd be amazed if anyone could beat your 30MMyr deal. Congrats Cmdr.
 

Anticon

Anticon
MattG said:
There are a few at 2 million years.
Click to expand...
OK, I'm officially amazed! 🍻 Have a beer on me!

I do wish, sometimes, that ED would tighten up a bit on their "ELW" parameters. It's beyond possible that a genuine ELW could have an axial tilt much exceeding 45 degrees, let alone some I've found that are nearly 90deg. Climate would be intolerable. And 2MMyr? Still a hot ball of gas and dust.

No matter, it's a willing suspension of disbelief.
 

Proph V

P
Unless all these really young ones are captured rogue ELW?
But even then, seems unlikely.
Simple comparison to Earth might not be too valid either. Much of our early history would have been wiped out by the Lunar Event (100-150MY after accretion), so we can't really say how early our own planet might have been habitable.
 

mitchZ

mitchZ
Late to this thread, but here's two notable ELWs that I found this year:

Screenshot 2021-12-16 16.31.38.png

This one is a ringed ELW in a trinary with two gas giants, which have their own rings and moons.


Screenshot 2021-12-16 16.32.24.png

And this one is an ELM orbiting a Water World (non-terraformable) in a B-type system. That's two rarities in one! Not to mention the star is only 162 million years old; those are T Tauri stars, not brown dwarfs.
 

Pirin

Pirin
Few days ago i found an ELW in a system where the main star is a WD. I know this is rare, but is there any data how exactly rare it is? Like, how many such ELWs are found so far, for example
 

Crusina Luachra

Crusina Luachra
Pirin said:
Few days ago i found an ELW in a system where the main star is a WD. I know this is rare, but is there any data how exactly rare it is? Like, how many such ELWs are found so far, for example
Click to expand...
On a scale of 1 to 10 with 10 being the rarest it's about a 6 or 7 at the max.

Personally speaking, I'd put it at a 5.



And I'm not trying to put down your discovery either. I'd wager something like a 5 is still close to like a 4% chance. Which is still unbelievably rare compared to most things.

But when you compare it to other rare finds it's not quite the stand out.


NOW that being said, if you found an earthlike orbiting an white dwarf that was NOT the primary star, I'd put that as a 8 or 9 on the rarity scale.


To put it into perspective, I've found an Earthlike inside of a undiscovered planetary nebula. Consider how rare planetary nebula are vs everything else and think about those odds.

now consider that I have personally never found an earthlike orbiting a WD or Neutron star that isn't the primary. I'm sure someone has/that it exists but I've never heard of it myself.
 

MattG

MattG
Pirin said:
Few days ago i found an ELW in a system where the main star is a WD. I know this is rare, but is there any data how exactly rare it is? Like, how many such ELWs are found so far, for example
Click to expand...

I have some data, though a good few months old now (not that it should change things too much).

In a database of ELWs there are 315959 entries. Of those, just 139 record a main star as a White Dwarf - so ~0.044% of all ELWs discovered. Of those, 113 orbit 1 or more secondary stars. 23 co-orbit the White Dwarf and at least 1 other secondary star. Just 3 orbit only the White Dwarf.

Note that this is not the chance of an ELW existing around a WD - I do have those stats somewhere but can't find them this second. This is the percentage of all ELWs known to exist (as per EDSM) that have a main star as a White Dwarf. I'd personally still throw it in at a solid 8/10. If it co-orbits the main star we can bump it to 9. And if it only orbits the WD, you've found a 10/10 bona fide unicorn 🦄

As for an ELW orbiting a non-main WD...
ELW orbiting a WD that is secondary to a Neutron
A2Qcrms.png
 

MattG

MattG
I found the other stats. Again, quite old now but no reason to expect this would've changed significantly. I took the total number of systems discovered at the time (according to spansh dumps) that had a WD as the main star and also how many of those systems contained an ELW - there's no way to cherry pick this figure so it should be pretty accurate. It came out as 0.0712% chance of any given WD system containing an ELW at all. Or, you'll find on average 1 ELW per ~1404 systems with a main star as white dwarf. From the figures above, you have a 3 in 139 chance of the ELW only orbiting the WD, meaning such a unicorn is over 1 in 65000 odds.

For comparison, it'd be 1 ELW per ~120 d-mass neutron systems, or 1 ELW per ~112 e-mass neutron systems, or 1 ELW per ~207 e-mass black hole systems.
 

marx

marx
Those are around the same ratios I made for the ELW list, but those were taken over a year ago.
Pretty much all of the possibilities are in the Very Rare category, although if it "only" fits the "WD main star" criterion, then that went up one tier, from GFL to Very Rare. So, @Pirin , congrats on your find!

White Dwarf systems are problematic for Earth-likes because of the thin and close habitable zone of them. It's little wonder that in most of the cases, other stars are involved: their addition to the habitable zone helps a lot. But then, consider that even with those, the chances are pretty slim: a lot of things have to go right for an Earth-like world to be there and stay there.
 

Crusina Luachra

Crusina Luachra
MattG said:
ELW orbiting a WD that is secondary to a Neutron
A2Qcrms.png
Click to expand...

That WD is still one of the primary stars in the system. Is there any record of an earthlike orbiting a WD that isn't one of the primary stars?


There's a few things I'm still looking for:

1. More then 5 stars in close proximity. Best I've ever found is 5 stars about 70ls apart. four in a sphere about 30ls and a 5th about 40ls away from that. I don't know how to search records but I don't even know what the record for most stars/closest proximity is.

https://imgur.com/44jrIKb
Source: https://imgur.com/44jrIKb


I've yet to find ANY system with more than 5 though. If anyone does find one, I imagine it'd be a first.

2. atmospheric planet within 10ls or closer to a black hole (though I suppose a Neutron/WD would be just as good, even better if they were ringed). Of that best i've found is an two odyssey atmospheric planets approximately 14 and 17ls away respectively.




There's a ton more specific niche things I am looking for, like at least 5 stars in close proximity with a landable planet for instance.
 
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