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MBH689: red giant star with 4 planets

  MBH689.1   MBH689.2  
MBH689.3
 
MBH689.4
 

Solar system 'MBH689' comprises the star 'MBH689' and the retinue of celestial objects gravitationally bound to it: 4 planets and their 184 moons, as well as asteroids, meteoroids, planetoids, comets, and interplanetary dust.

The principal component of this star system is the star 'MBH689', a red giant class star that contains about 99.8% of the system's known mass and dominates it gravitationally. MBH689 is located more than 2819 lightyears from the center of the galaxy.

This solar system comprises 4 planets

MBH689.1 is a small terrestrial planet (4392 km radius) which orbits its star in 162 Earth days, one day on MBH689.1 lasts 16 Earth hours. Its average temperature is 854 K (581 C), its atmosphere mainly consists of nitrogen, oxygen and it has 1 moons.
MBH689.2 is a large terrestrial planet (8579 km radius) which orbits its star in 447 Earth days, one day on MBH689.2 lasts 7 Earth hours. Its average temperature is 441 K (168 C), its atmosphere mainly consists of nitrogen, oxygen and it has 33 moons.
MBH689.3 is a large gas giant (67970 km radius) which orbits its star in 110411 Earth days, one day on MBH689.3 lasts 4 Earth hours. Its average temperature is 1303 K (1030 C), its atmosphere mainly consists of hydrogen, helium and it has 37 moons.
MBH689.4 is a very large terrestrial planet (9128 km radius) which orbits its star in 202839 Earth days, one day on MBH689.4 lasts 7 Earth hours. Its average temperature is 1106 K (833 C), its atmosphere mainly consists of hydrogen and it has 113 moons.
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Planetary Statistics

planet:MBH689.1MBH689.2MBH689.3MBH689.4
distance from star:40*106 km79*106 km3127*106 km4691*106 km
radius:4392 km8579 km67970 km9128 km
mass:677*1021 kg5051*1021 kg2512128*1021 kg6084*1021 kg
surface gravity: 2.34 m/s2
0.23 Earths
4.58 m/s2
0.46 Earths
36.2 m/s2
3.70 Earths
4.87 m/s2
0.49 Earths
escape velocity:4.536 km/s8.865 km/s70.23 km/s9.432 km/s
year: 243 MBH689.1 days
162 Earth days
1532 MBH689.2 days
447 Earth days
662466 MBH689.3 days
110411 Earth days
695448 MBH689.4 days
202839 Earth days
day:16 hrs7 hrs4 hrs7 hrs
axial tilt:339°27°
temperature:854 K
581 C
441 K
168 C
1303 K
1030 C
1106 K
833 C
atmosphere:4% H2
1% He
55% N2
38% O2
2% CO2
0% other
81% N2
13% O2
6% CO2
0% other
88% H2
12% He
0% other
91% H2
9% He
0% other
moons:13337113
rings:00113

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