ELW bucket list

MattG · Dec 10, 2019

Pirin said:
- ELW orbiting a Herbig in a system where the primary star is O. By the time i reported it, it was the only reported ELW in system with O as main star.

Well then. I guess I need to make time to begin the great O search again. Hmph. Where is a good sector to find both O and T stars in abundance, I wonder...

I need to update my records to determine what I have/haven't done. I have combinations of some of these though that probably start pushing them into the GFLWT category...

marx · Dec 10, 2019

Sorry, I made a mistake with the counts of ELW's moons, and there are more than I originally thought. ELWs with two or three moons are now in the "very rare" category (hm, I should come up with a better name), and it's four or more for the last category. (I actually wrote "four or five" there originally, but then it turned out there are a few with even more moons.)

marx · Dec 10, 2019

Heavy Johnson said:
I think my POI of Erik's world might count in the "Good F---ing Luck" category....

EDSM - Elite Dangerous Star Map

The Galactic Positioning System of Elite: Dangerous at your service.

www.edsm.net

Hm, that's an interesting question. On its own, a ringed ELW and a black hole primary would be in the very rare category - rounded up to 0.1%. However, if we were to include a "system is mass code G" designation, then it would get to GFLwT solely on that.
But if I did add that, then I'd have to add the other mass codes, and catalogue star systems... Hm, I'll have to think on it a bit more, but right now, I'm leaning towards not.

varonica · Dec 10, 2019

Not sure there's even a box for these ones;

Binary ELW's orbiting three stars!

Reiko31 · Dec 10, 2019

varonica said:
Not sure there's even a box for these ones;

Binary ELW's orbiting three stars!

Incredible find!

marx · Dec 10, 2019

varonica said:
Not sure there's even a box for these ones;

Sure, there are. Binary ELW pair: check. Co-orbiting three stars: probably, it's a bit hard to tell from the system map sometimes. The ELWs are named ABC 1 and 2, right? If yes, then check. Solo bodies, check. (Well, technically there are two bodies in the system, but let's just go with a solo pair then.) Congrats!

varonica · Dec 10, 2019

marx said:
Sure, there are. Binary ELW pair: check. Co-orbiting three stars: probably, it's a bit hard to tell from the system map sometimes. The ELWs are named ABC 1 and 2, right? If yes, then check. Solo bodies, check. (Well, technically there are two bodies in the system, but let's just go with a solo pair then.) Congrats!

So....where do I collect my prize, oh and I'm shouting the beers!

varonica · Dec 10, 2019

Then there was this one a while back;

Solo ringed earth like world orbiting a neutron star.

varonica · Dec 14, 2019

While all of the ELW's here are interesting in thier own right, I do have a favourite myself, I only regret I'm not the one with my name on the discovery tag, although I am sure it was blank when I first found it, which was part way through a long trip around the galaxy so there was plenty of time for someone else to grab it, however I was the first one to report it to EDSM so there. I can only imagine what the view would be from this planet, imagine a civilisation growing there, what would the night sky look like?

That little earth like world, in a binary orbit with a T Tuari, with another star and six gas giants between it and the primary, and it's only 433 ls from that primary. That's like having seven Jupiters between us and the sun! Imagine the view at night!

Heavy Johnson · Dec 14, 2019

I'd like to add a few criteria (or just stats/info) to the "Good F***ing Luck with These" category:

Parent body is a C star (none known outside bubble)
Parent body is an O-class star (none known)
Parent body is a Wolf-Rayet star (only 1 known, which is in the bubble)
Parent body is a Black Hole and no other stars in system (none known)
Parent body is a CJ star (8 known)
Parent body is a CN star (46 known)
Parent body is a S star (61 known)
Parent body is a Red giant (M-class) star (110 known, 80 with no other star type)
Parent body is a Class I gas giant, ie ELM moon of Class I gas giant (none known)
Parent body is a Class II gas giant, ie ELM moon of Class II gas giant (7 known, 3 in one system!)
Parent body is a Class III gas giant, ie ELM moon of Class III gas giant (66 known)
Parent body is a Class IV gas giant, ie ELM moon of Class IV gas giant (58 known)
Parent body is a Helium-Rich Gas Giant, ie ELM moon of Helium-Rich Gas Giant (only 1 known outside the bubble)
Parent body is a Water giant, ie ELM moon of a Water giant (1 known)

JonathanBurnage · Dec 15, 2019

Just found me an ELW with a binary terraformable HMC partner, orbiting three stars (2xM and an L) along with three other HMCs and a water world, all of which are also terraformable, in a system with a neutron star primary. Got to be at least quite unusual?

marx · Dec 15, 2019

@Heavy Johnson: missed your post the other day, sorry. All those are already under the category, covered by "ELM with parent other than the ones above". Still, nice to see the exact numbers.

@JonathanBurnage: yep, mainly because if it's in direct orbit of three stars (planet ID is ABC 1, or similar), then there's the neutron star primary. That's rare, so congrats!

Zieman · Dec 15, 2019

Heavy Johnson said:
I'd like to add a few criteria (or just stats/info) to the "Good F***ing Luck with These" category:

Parent body is a Class IV gas giant, ie ELM moon of Class IV gas giant (58 known)

Haha, so my ringed ELM of Class IV GG is a 'good f***ing luck' category one then!

Leif_Erikson · Dec 15, 2019

Leif_Erikson said:
Surprised how rare an ELW with more than one moon is (<0.025%). I did find one with 2 moons and thought it was unusual but did not think it was that rare.
Which means I do have one in the Good F***ing Luck category!

marx said:
Sorry, I made a mistake with the counts of ELW's moons, and there are more than I originally thought. ELWs with two or three moons are now in the "very rare" category

Oh well, you win some and you lose some........

Heavy Johnson said:
I'd like to add a few criteria (or just stats/info) to the "Good F***ing Luck with These" category:

Parent body is a CN star (46 known)

Parent body is a S star (61 known)

Parent body is a Red giant (M-class) star 80 with no other star type

I'll have one of these for the "Good F***ing Luck with These" category instead

Mooing · Dec 16, 2019

marx said:
Good F***ing Luck with These, because at best only a handful have been found (<0.025%):

system main star type: Herbig

Proud discoverer of this system:

Not only is it in a Herbig system, but it's also in a nebula that was a POI on DW2!

Also this ringed ELM in a B-class star system.

Mooing · Dec 18, 2019

You say a trinary set of ELMs hasn't been found, but in fact, one has: Breakthrough Echoes.
Unless you mean three ELMs orbiting each other, in which case I don't know of any binary ELMs that do that.

Heavy Johnson · Dec 18, 2019

marx said:
Hm, that's an interesting question. On its own, a ringed ELW and a black hole primary would be in the very rare category - rounded up to 0.1%. However, if we were to include a "system is mass code G" designation, then it would get to GFLwT solely on that.
But if I did add that, then I'd have to add the other mass codes, and catalogue star systems... Hm, I'll have to think on it a bit more, but right now, I'm leaning towards not.

It was the ring that put it over the top, I figured. BH+NS+ELW+ring

Heavy Johnson · Dec 18, 2019

MattG said:
Well then. I guess I need to make time to begin the great O search again. Hmph. Where is a good sector to find both O and T stars in abundance, I wonder...

I need to update my records to determine what I have/haven't done. I have combinations of some of these though that probably start pushing them into the GFLWT category...

The holy grail here is an ELW or AW directly around an O-class (not a secondary star in a system w/ an O primary).

marx · Dec 18, 2019

Mooing said:
You say a trinary set of ELMs hasn't been found, but in fact, one has: Breakthrough Echoes.
Unless you mean three ELMs orbiting each other, in which case I don't know of any binary ELMs that do that.

Yes, by binary planets (or double planets), I mean two bodies orbiting a shared barycenter, and by trinary, three.
There is one pair of binary Earth-like moons known: Myumbao AA-A h362, discovered by CMDR ReggieNoble.

marx · Dec 18, 2019

Heavy Johnson said:
It was the ring that put it over the top, I figured. BH+NS+ELW+ring

Oh yeah, I ignored the neutron star, since the above only lists system main stars. Putting all other stars in might make results go all over the place, and it's the main star that's the most important one anyway. It's just that in these rare cases, it's not another star that enables the ELW in the first place - which is why black hole main stars are so rare in the first place.

Heavy Johnson said:
The holy grail here is an ELW or AW directly around an O-class (not a secondary star in a system w/ an O primary).

Likely impossible, given that the habitable zone of O stars is far from where planets seem to form around them. But hey, I was wrong about T main stars before, so it would be great if I were proven wrong again.
Personally, I'd count the holy grail as an ELW+ELM pair. (Natural, that is, neither terraformed.) They should be possible, especially if the atmospheric moon surface temperature were fixed, but so many things would have to align just right that the odds are astronomically low.