Smallest planet

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Cody
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Smallest planet

Post by Cody »

With a radius of just 2820 km, is Ereddive the smallest planet in the Eight?
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Re: Smallest planet

Post by stranger »

Erbieder (Sector 7, No 134) - 2817 km
Isri (Sector 8, No 129) - 2817 km
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Re: Smallest planet

Post by Cody »

Three klicks, eh? It was close. Thanks, stranger!
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Re: Smallest planet

Post by Cody »

Another question: I know which system has the second-longest WP/station run (Ontilain), but which system has the longest?
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Re: Smallest planet

Post by stranger »

This question needs some math. There is planet_distance parameter (distance from WP to planet centre) and station_vector parameter (station position relative to planet) in planetinfo.plist. So you need to calculate WP-station side of triangle.

Top five systems sorted from longest planet_distance:
Aatenbe (1 63)
Onenceve (4 121)
Arazaes (0 92)
Aesarge (6 138)
Ontilain (6 36)
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Re: Smallest planet

Post by Cody »

Thanks again, amigo!
stranger wrote: Wed Feb 24, 2021 10:52 pmTop five systems sorted from longest planet_distance:
Aatenbe (1 63)
Onenceve (4 121)
Arazaes (0 92)
Aesarge (6 138)
Ontilain (6 36)
All of which are large planets. Is the largest planet in the Eight among them? Aatenbe, perhaps?
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Re: Smallest planet

Post by stranger »

Aenlege (3, 115) - 6911 km
Onisaned (3, 151) - 6911 km
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Re: Smallest planet

Post by Cody »

<grins> And on a small planet such as Ereddive, the surface gravity would be what - 0.2 standard? Something like that?









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Re: Smallest planet

Post by stranger »

In first approximation surface gravity is in linear proportion with planet radius. (M ~ R^3, g ~ M * R^-2, -> g ~ R).
So 2820/6378 = 0.442 g.
In reality large planets tended to be more compressed, having more density and more mass. Mars for example has 3397 km radius (3397/6378 = 0.5325 R♁), but due to lower density has only 1/10 of Earth mass and surface gravity only 0.38 g. Extrapolating this tendency planet with 2820 radius will have only 0.32 g or so.

UPD. Planet density is also depends on location. More distance from sun -> more volatiles in protoplanetary nebula -> more ices and less rocks in planet composition -> less density.
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