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NHB857: red dwarf star with 4 planets

  NHB857.1   NHB857.2   NHB857.3   NHB857.4  

Solar system 'NHB857' comprises the star 'NHB857' and the retinue of celestial objects gravitationally bound to it: 4 planets and their 43 moons, as well as asteroids, meteoroids, planetoids, comets, and interplanetary dust.

The principal component of this star system is the star 'NHB857', a red dwarf class star that contains about 99.99% of the system's known mass and dominates it gravitationally. NHB857 is located more than 3261 lightyears from the center of the galaxy.

This solar system comprises 4 planets

NHB857.1 is a large terrestrial planet (7155 km radius) which orbits its star in 182 Earth days, one day on NHB857.1 lasts 8 Earth hours. Its average temperature is 213 K (-60 C), its atmosphere mainly consists of nitrogen and it has 10 moons.
NHB857.2 is a medium terrestrial planet (6552 km radius) which orbits its star in 721 Earth days, one day on NHB857.2 lasts 9 Earth hours. Its average temperature is 68 K (-205 C), its atmosphere mainly consists of nitrogen, oxygen and it has 9 moons.
NHB857.3 is a very small terrestrial planet (2666 km radius) which orbits its star in 1324 Earth days, one day on NHB857.3 lasts 39 Earth hours. Its average temperature is 45 K (-228 C), its atmosphere mainly consists of nitrogen and it has 0 moons.
NHB857.4 is a medium terrestrial planet (5377 km radius) which orbits its star in 2433 Earth days, one day on NHB857.4 lasts 12 Earth hours. Its average temperature is 27 K (-246 C), its atmosphere mainly consists of nitrogen, oxygen and it has 24 moons.
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Planetary Orbits

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Planetary Statistics

planet:NHB857.1NHB857.2NHB857.3NHB857.4
distance from star:43*106 km109*106 km163*106 km245*106 km
radius:7155 km6552 km2666 km5377 km
mass:2930*1021 kg2250*1021 kg151*1021 kg1243*1021 kg
surface gravity: 3.81 m/s2
0.38 Earths
3.49 m/s2
0.35 Earths
1.41 m/s2
0.14 Earths
2.86 m/s2
0.29 Earths
escape velocity:7.393 km/s6.770 km/s2.749 km/s5.554 km/s
year: 546 NHB857.1 days
182 Earth days
1922 NHB857.2 days
721 Earth days
814 NHB857.3 days
1324 Earth days
4866 NHB857.4 days
2433 Earth days
day:8 hrs9 hrs39 hrs12 hrs
axial tilt:13°13°11°349°
temperature:213 K
-60 C
68 K
-205 C
45 K
-228 C
27 K
-246 C
atmosphere:87% N2
6% O2
7% CO2
0% other
1% H2
1% He
64% N2
34% O2
0% other
94% N2
6% CO2
0% other
63% N2
37% O2
0% other
moons:109024
rings:0000

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