Have you Seen any of these on your travels?

[Sooden]

I'm still working on a project of badges and achievements, more like a list of things to look for when exploring (think I'm over 100 items so far). Hopefully give direction to people that are not sure what they want to do on an expedition. It could still be a few weeks away, already given it a few months work (mainly time spent looking for expected objects), but I keep get questions that are hard to answer and was hoping , opening this thread, I could get some info

Spoiler

I will start with: 'Thing I not sure exist in ED'. so if you have come across them, or even have a screen shot, that would help me loads. Also note, not all achievements are as difficult as the ones i'm about to list, these are the higher end one.

1) Any Earth Like around a O-type star (may not exist due to young age of 'O' stars)

2) Any non-gas planet 130km or less in radius, with NO atmosphere

3) Any non-gas 'Land-able' planet within 350ls of Super-giant star (Arrival point)

4) Any ringed Black Hole (Edited typo)

5) Any ringed White Dwarf (Edited typo)

6) Find a system with 180 or more bodies (may include asteroid belts)

7) Find a system containing at least one of each the following stars: O,B,A,F,G,K,M

8) Mars Like (Terraformed)
-An Earth Like
-0.1070 Earth Masses +- 0.0268 (25%)
-NO Volcanism
-Radius of 3,396km +- 340 km (10%)
-Gravity of 0.38g +- 0.09g (25%)
-Surface Temp 261K +- 65K (25%)
-Surface Pressure 2.30 Atmospheres +- 1.15 (50%)

Added:

9) Any non-gas planet with 31% Hydrogen atmosphere and 0.1 or more surface pressure. (Pending final value)

 

[PanicButton]

Here are two things I'm actively looking for, maybe you could add them to your list (if not already on it)
-Moon orbiting inside the ring of a planet.
-Very fast moving ring.

I saw both of these here on the forums, haven't them myself though.

(maybe it's just me, but I can't read that picture)

 

[Sooden]

Here are two things I'm actively looking for, maybe you could add them to your list (if not already on it)
-Moon orbiting inside the ring of a planet.
-Very fast moving ring.

I saw both of these here on the forums, haven't them myself though.

(maybe it's just me, but I can't read that picture)

the only problem with moons in rings (even found this my self ) is they are harder to measure and could be too subjective . So I've tried to avoid such achievements.

Will look into rings a bit more, see what data they list and what i could use Ty of the ideas

and the picture is made small to keep it a surprise as some values or not final yet.

 

[Allitnil]

1) Any Earth Like around a O-type star (may not exist due to young age of 'O' stars)

2) Any non-gas planet 130km or less in radius, with NO atmosphere

3) Any non-gas 'Land-able' planet within 350ls of Super-giant star (Arrival point)

4) Any a ringed Black Hole

5) Any a ringed White Dwarf

6) Find a system with 180 or more bodies (may include asteroid belts)

7) Find a system containing at least one of each the following stars: O,B,A,F,G,K,M

8) Mars Like (Terraformed)
-An Earth Like
-0.1070 Earth Masses +- 0.0268 (25%)
-NO Volcanism
-Radius of 3,396km +- 340 km (10%)
-Gravity of 0.38g +- 0.09g (25%)
-Surface Temp 261K +- 65K (25%)
-Surface Pressure 2.30 Atmospheres +- 1.15 (50%)

Based on my experience / knowledge:

1. Might be possible. I'm investigating every O type I come across in DW but have yet to come close.

2. The smallest planet recorded to date is 138 Km.

3. Don't know.

4. probably impossible in ED. We only have ringed stars where they are directly orbiting other ones (ie not around a barycentre) and I've never seen a black hole orbiting another star.

5. ditto

6. I think the record is ~112 excluding asteroids. 180 would almost certainly be a new record.

7. Probably theoretically possible, but never seen anything close.

8. Almost certainly impossible as the lowest recorded mass for an ELW is over 0.2 earth masses

 

[Sooden]

Based on my experience / knowledge:

1. Might be possible. I'm investigating every O type I come across in DW but have yet to come close.

2. The smallest planet recorded to date is 138 Km.

3. Don't know.

4. probably impossible in ED. We only have ringed stars where they are directly orbiting other ones (ie not around a barycentre) and I've never seen a black hole orbiting another star.

5. ditto

6. I think the record is ~112 excluding asteroids. 180 would almost certainly be a new record.

7. Probably theoretically possible, but never seen anything close.

8. Almost certainly impossible as the lowest recorded mass for an ELW is over 0.2 earth masses

4) and 5), ringed like a gas giant is. have seen an image of a ringed neutron star, so guessing it may happen. My typo on 4 and 5 may have confused the subject

6) there will be a separate award for systems without asteroid, seem to remember one containing asteroids reaching 158

8) yeah, i'm thinking the same on that one, but never know

 

[goemon]

4. probably impossible in ED. We only have ringed stars where they are directly orbiting other ones (ie not around a barycentre) and I've never seen a black hole orbiting another star.

i have seen a black hole as a secondary body in two systems, and both were orbiting the main star (around a barycenter?). both weren't ringed. i need to go through my notes from last summer to find the first one, but the other is GCRV 4981b / Eskimo Nebula, right around the corner of the bubble, and it is orbiting the o-class main star (around a barycenter?).

 

[Allitnil]

4) and 5), ringed like a gas giant is. have seen an image of a ringed neutron star, so guessing it may happen. My typo on 4 and 5 may have confused the subject

I learn something new every day . Hadn't seen a BH/NS/WD orbiting another star so assumed they weren't possible. Googling for a ringed NS also showed a WD (not ringed) in orbit so that one is also going to be possible. Presumably then it is theoretically possible for a ringed BH too but the main star would need to be massive.

 

[Sooden]

didn't think to google for ringed WD or BH, saw images of a ringed WD so i guess that one is in

 

[goemon]

4. probably impossible in ED. We only have ringed stars where they are directly orbiting other ones (ie not around a barycentre) and I've never seen a black hole orbiting another star.

GRO_J1655-40 and XTE_J1650-500 are said to have 5-10 solar masses - i have not enough knowledge of astronomy to calculate the mass a primary stellar body would need to have, that a "small" black hole would directly orbit it.

GCRV 4981a (o class) has more then 3 times the mass of GCRV 4981b / Eskimo Nebula. (85 solar masses vs. 25 solar masses)
___

here you go: http://universalcartographics.org/records/smallest-black-hole/ - 2.5 solar masses.

 

[iain666]

1) Any Earth Like around a O-type star (may not exist due to young age of 'O' stars)

There are none on the list of earth like planets but there are 13 around T Tauris so age doesn't seem to present much of a barrier. I wouldn't be surprised to see one of these turn up.

 

[Ziljan]

GRO_J1655-40 and XTE_J1650-500 are said to have 5-10 solar masses - i have not enough knowledge of astronomy to calculate the mass a primary stellar body would need to have, that a "small" black hole would directly orbit it.

GCRV 4981a (o class) has more then 3 times the mass of GCRV 4981b / Eskimo Nebula. (85 solar masses vs. 25 solar masses)
___

here you go: http://universalcartographics.org/records/smallest-black-hole/ - 2.5 solar masses.

The reason black holes tend to be primaries is because even after going nova, they usually still have more mass than their companion. However, if the two stars are close in mass, then when the black hole loses mass in its death throws, the secondary can become the more massive object. Hence the barycenter would shift to the still living star. The smaller star may also siphon off some of the mass of the larger star as the outer layers expand right before it goes nova, tilting the final scales even more. Of course some of the mass of the secondary may be lost depending on how tightly bound the outer layers are and the internal dynamics of the explosion which can be variable.

 

[Sooden]

have added this to the list

9) Any non-gas planet with 31% Hydrogen atmosphere and 0.1 or more surface pressure. (Pending final value)

need to work out where to set my values as the highest percent i have seen is 19.2 % so 31% my be to high.

Spoiler

added: just found one with 19.3%