So, i found a 20.3 earth masses landable planet

CMDR Greenwell

C
I dared not land on my anaconda.

yqVKSfV.jpg
 

Lucius-Darcia

Lucius-Darcia
Yeah tell us please the G-force^^ can it beat the actual record of 9.77?^^


Edit
ah naah....
just seeing that HD 148937 3 has 97.9391 earthmasses :eek: but at nearly similar radius
 
Last edited:

Commander Guathix

C
Can't wait to see the exact name to crash on the planet in a python without a rebuy cost!
That planet will be a graveyard for ships...
Nobody will be able to land on it.
 

newman1702

newman1702
It's a large ice world, those don't have that much gravity. As Allitnil pointed out the gravity shouldn't be much over 2g's on that hing. I've seen bigger and higher g ice worlds, but they'll always have less g's than similarly sized hmc's since their overall density is much lower, so less mass over volume.
 

CMDR Greenwell

C
Correct the radius is too big. 2.2g on surface. I got so excited when i saw the earth masses, i forgot my physics 101 and didn't check the radius. And now to repent i am going to whip myself in front of an image of sir Isaac Newton whith the game of thrones nun that repeats: "shame, shame, shame"
 

goemon

goemon
newman1702 said:
It's a large ice world, those don't have that much gravity. As Allitnil pointed out the gravity shouldn't be much over 2g's on that hing. I've seen bigger and higher g ice worlds, but they'll always have less g's than similarly sized hmc's since their overall density is much lower, so less mass over volume.
Click to expand...

thanks for the explanation. makes sense.
 

psefergr

psefergr
CMDR Greenwell said:
Correct the radius is too big. 2.2g on surface. I got so excited when i saw the earth masses, i forgot my physics 101 and didn't check the radius. And now to repent i am going to whip myself in front of an image of sir Isaac Newton whith the game of thrones nun that repeats: "shame, shame, shame"
Click to expand...



So what's the system name?
 

CAPTAIN CHEDDAH

C
newman1702 said:
It's a large ice world, those don't have that much gravity. As Allitnil pointed out the gravity shouldn't be much over 2g's on that hing. I've seen bigger and higher g ice worlds, but they'll always have less g's than similarly sized hmc's since their overall density is much lower, so less mass over volume.
Click to expand...

Good explanation but got to point out that it being an icy planet makes no difference, there will be high density icy planets as well, maybe not 9.77G though haha.
Simple way to figure it out using trusty Newtonian gravity:

g = m / r^2

g = surface gravity of the planet expressed as a multiple of the Earth's surface gravity,
m = mass of the planet expressed as a multiple of Earth's mass,
r^2 = the radius of the planet also expressed as a multiple of the Earth's mean radius (6,371km) squared.

So in this case:
g = 20.3777 / (19,409 / 6,371)^2
g = ~2.20G = ~21.54 m/s^2
 

CAPTAIN CHEDDAH

C
Scoopy Doopy said:
Sorry but not even close to the record. Currently 58 Earth masses for a landable planet.

The list is here (I know because I found number 6, yay me)
Click to expand...

That is a record for largest radius not for highest mass and not a record of the value most people really care about: the planets surface gravity.
#5 on that list; Epsilon Orionis AB 2 has 81.57 Earth masses and 7.11G, 133% mass and 175% surface gravity compared to the #1 you quoted.
A great find by you and all the others though. o7


 

newman1702

newman1702
CAPTAIN CHEDDAH said:
Good explanation but got to point out that it being an icy planet makes no difference, there will be high density icy planets as well, maybe not 9.77G though haha.
Simple way to figure it out using trusty Newtonian gravity:

g = m / r^2

g = surface gravity of the planet expressed as a multiple of the Earth's surface gravity,
m = mass of the planet expressed as a multiple of Earth's mass,
r^2 = the radius of the planet also expressed as a multiple of the Earth's mean radius (6,371km) squared.

So in this case:
g = 20.3777 / (19,409 / 6,371)^2
g = ~2.20G = ~21.54 m/s^2
Click to expand...

Every icy world in this game that I've seen after 20k+ systems had a much lower mass than,say, a hmc of equal radius. Since it's mostly made of frozen water ice I would say lower density does indeed make a difference :)
 
You must log in or register to reply here.
Back
Top Bottom