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Forum » SpaceEngine » Science and Astronomy Discussions » Planet 9 Thread
Planet 9 Thread
WatsisnameDate: Sunday, 04.09.2016, 09:23 | Message # 31
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Wow. Planet 9's satellite system could be huge (in terms of size, not mass). Its Hill Sphere is a whopping 6AU in radius -- greater than the distance from the Sun to Jupiter! We might expect it to have captured moons within about 1/3 to 1/2 of that range.




 
steeljaw354Date: Sunday, 04.09.2016, 12:43 | Message # 32
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Planet 9 would be the strangest planet. I could imagine all sorts of different moons orbiting around it. Earth size moons possible like 5 AU out?
 
JackDoleDate: Sunday, 04.09.2016, 12:43 | Message # 33
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Quote Watsisname ()
Planet 9's satellite system could be huge (in terms of size, not mass). Its Hill Sphere is a whopping 6AU in radius -- greater than the distance from the Sun to Jupiter! We might expect it to have captured moons within about 1/3 to 1/2 of that range.

Okay, based on these values, here are a few moons of Planet 9 biggrin



(Planet 9 is here)

Attachments: 2778324.jpg(350Kb) · P9Moons-n100.sc(34Kb)





Don't forget to look here.



Edited by JackDole - Sunday, 04.09.2016, 12:44
 
steeljaw354Date: Sunday, 04.09.2016, 12:46 | Message # 34
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Can I get the Ice Giant version of it? Since I don't really think a terra is realistic, it's awesome but I like to go by realism.

EDIT: It's not needed. I did it myself. How big would the moons be?


Edited by steeljaw354 - Sunday, 04.09.2016, 13:04
 
WatsisnameDate: Sunday, 04.09.2016, 19:21 | Message # 35
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Quote steeljaw354 ()
Earth size moons possible like 5 AU out?


Probably more like 2 to 3 AU out, and those moons would be small. Think of Jupiter's satellite system for an analogue -- big moons are close in on nice circular, coplanar orbits, with smaller stuff further out in highly inclined orbits.

JackDole, love all the names. biggrin





 
steeljaw354Date: Sunday, 04.09.2016, 19:46 | Message # 36
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Could it really be two 5 earth mass planets orbiting close together?
 
JackDoleDate: Sunday, 04.09.2016, 20:27 | Message # 37
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Quote Watsisname ()
JackDole, love all the names.

Thank you.

Do you mean the names of the named moons in my Planet 9 system?



I think they would fit if there were such moons.
Gollum might not fit fully into the naming scheme, but why not? dry

The names for Planet 9 were my suggestions, if he would be discovered, and there would be a contest to name him:
Tartaros, because it represents the deepest level of the underworld,
Sisyphos because of its eccentric orbit, he kept trying to approach the sun, but then has to go far away again!

Attachments: 4820854.jpg(208Kb)





Don't forget to look here.

 
steeljaw354Date: Sunday, 04.09.2016, 20:33 | Message # 38
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I prefer Sisyphos because there may be more planet sized objects even further out
 
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