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MCG557: red dwarf star with 8 planets

 
MCG557.1
  MCG557.2   MCG557.3   MCG557.4  
MCG557.5
 
MCG557.6
  MCG557.7  
MCG557.8
 

Solar system 'MCG557' comprises the star 'MCG557' and the retinue of celestial objects gravitationally bound to it: 8 planets and their 431 moons, as well as asteroids, meteoroids, planetoids, comets, and interplanetary dust.

The principal component of this star system is the star 'MCG557', a red dwarf class star that contains about 99.52% of the system's known mass and dominates it gravitationally. MCG557 is located more than 2819 lightyears from the center of the galaxy.

This solar system comprises 8 planets

MCG557.1 is a very large terrestrial planet (11205 km radius) which orbits its star in 635 Earth days, one day on MCG557.1 lasts 9 Earth hours. Its average temperature is 103 K (-170 C), its atmosphere mainly consists of nitrogen, oxygen and it has 31 moons.
MCG557.2 is a small terrestrial planet (3803 km radius) which orbits its star in 1168 Earth days, one day on MCG557.2 lasts 25 Earth hours. Its average temperature is 91 K (-182 C), its atmosphere mainly consists of nitrogen, carbon dioxide and it has 5 moons.
MCG557.3 is a small terrestrial planet (3147 km radius) which orbits its star in 2145 Earth days, one day on MCG557.3 lasts 33 Earth hours. Its average temperature is 61 K (-212 C), its atmosphere mainly consists of nitrogen, oxygen and it has 4 moons.
MCG557.4 is a small terrestrial planet (3503 km radius) which orbits its star in 3942 Earth days, one day on MCG557.4 lasts 28 Earth hours. Its average temperature is 36 K (-237 C), its atmosphere mainly consists of hydrogen, nitrogen, oxygen and it has 8 moons.
MCG557.5 is a medium gas giant (35215 km radius) which orbits its star in 52410 Earth days, one day on MCG557.5 lasts 8 Earth hours. Its average temperature is 1916 K (1643 C), its atmosphere mainly consists of hydrogen and it has 89 moons.
MCG557.6 is a medium gas giant (26682 km radius) which orbits its star in 96284 Earth days, one day on MCG557.6 lasts 8 Earth hours. Its average temperature is 1673 K (1400 C), its atmosphere mainly consists of hydrogen, helium and it has 44 moons.
MCG557.7 is a large gas giant (79274 km radius) which orbits its star in 205299 Earth days, one day on MCG557.7 lasts 8 Earth hours. Its average temperature is 1786 K (1513 C), its atmosphere mainly consists of hydrogen, helium and it has 108 moons.
MCG557.8 is a medium gas giant (21695 km radius) which orbits its star in 377159 Earth days, one day on MCG557.8 lasts 8 Earth hours. Its average temperature is 1297 K (1024 C), its atmosphere mainly consists of hydrogen and it has 142 moons.
More planetary details...

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Planetary Orbits

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Planetary Statistics

planet:MCG557.1MCG557.2MCG557.3MCG557.4MCG557.5
distance from star:100*106 km150*106 km226*106 km339*106 km1903*106 km
radius:11205 km3803 km3147 km3503 km35215 km
mass:11254*1021 kg440*1021 kg249*1021 kg343*1021 kg349359*1021 kg
surface gravity: 5.98 m/s2
0.61 Earths
2.03 m/s2
0.20 Earths
1.67 m/s2
0.17 Earths
1.86 m/s2
0.19 Earths
18.8 m/s2
1.92 Earths
escape velocity:11.57 km/s3.929 km/s3.249 km/s3.615 km/s36.39 km/s
year: 1693 MCG557.1 days
635 Earth days
1121 MCG557.2 days
1168 Earth days
1560 MCG557.3 days
2145 Earth days
3378 MCG557.4 days
3942 Earth days
157230 MCG557.5 days
52410 Earth days
day:9 hrs25 hrs33 hrs28 hrs8 hrs
axial tilt:30°24°22°
temperature:103 K
-170 C
91 K
-182 C
61 K
-212 C
36 K
-237 C
1916 K
1643 C
atmosphere:3% H2
2% He
69% N2
26% O2
0% other
86% N2
3% O2
11% CO2
0% other
70% N2
30% O2
0% other
15% H2
3% He
43% N2
38% O2
1% CO2
0% other
97% H2
3% He
0% other
moons:3154889
rings:600012

planet:MCG557.6MCG557.7MCG557.8
distance from star:2854*106 km4729*106 km7094*106 km
radius:26682 km79274 km21695 km
mass:151965*1021 kg3985495*1021 kg81690*1021 kg
surface gravity: 14.2 m/s2
1.45 Earths
42.3 m/s2
4.32 Earths
11.5 m/s2
1.17 Earths
escape velocity:27.57 km/s81.92 km/s22.41 km/s
year: 288852 MCG557.6 days
96284 Earth days
615897 MCG557.7 days
205299 Earth days
1131477 MCG557.8 days
377159 Earth days
day:8 hrs8 hrs8 hrs
axial tilt:30°52°
temperature:1673 K
1400 C
1786 K
1513 C
1297 K
1024 C
atmosphere:79% H2
21% He
0% other
79% H2
21% He
0% other
94% H2
6% He
0% other
moons:44108142
rings:23016

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