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MCK421: red dwarf star with 4 planets

  MCK421.1   MCK421.2   MCK421.3   MCK421.4  

Solar system 'MCK421' comprises the star 'MCK421' and the retinue of celestial objects gravitationally bound to it: 4 planets and their 275 moons, as well as asteroids, meteoroids, planetoids, comets, and interplanetary dust.

The principal component of this star system is the star 'MCK421', a red dwarf class star that contains about 98.43% of the system's known mass and dominates it gravitationally. MCK421 is located more than 2819 lightyears from the center of the galaxy.

This solar system comprises 4 planets

MCK421.1 is a medium terrestrial planet (5215 km radius) which orbits its star in 177 Earth days, one day on MCK421.1 lasts 13 Earth hours. Its average temperature is 145 K (-128 C), its atmosphere mainly consists of hydrogen, nitrogen, oxygen and it has 0 moons.
MCK421.2 is a small terrestrial planet (3132 km radius) which orbits its star in 326 Earth days, one day on MCK421.2 lasts 29 Earth hours. Its average temperature is 129 K (-144 C), its atmosphere mainly consists of nitrogen, carbon dioxide and it has 1 moons.
MCK421.3 is a large gas giant (52478 km radius) which orbits its star in 77568 Earth days, one day on MCK421.3 lasts 4 Earth hours. Its average temperature is 1959 K (1686 C), its atmosphere mainly consists of hydrogen, helium and it has 111 moons.
MCK421.4 is a large gas giant (70665 km radius) which orbits its star in 173749 Earth days, one day on MCK421.4 lasts 4 Earth hours. Its average temperature is 1826 K (1553 C), its atmosphere mainly consists of hydrogen, helium and it has 163 moons.
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Planetary Orbits

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Planetary Statistics

planet:MCK421.1MCK421.2MCK421.3MCK421.4
distance from star:42*106 km64*106 km2471*106 km4231*106 km
radius:5215 km3132 km52478 km70665 km
mass:1134*1021 kg245*1021 kg1156170*1021 kg2822949*1021 kg
surface gravity: 2.78 m/s2
0.28 Earths
1.66 m/s2
0.16 Earths
28.0 m/s2
2.86 Earths
37.7 m/s2
3.85 Earths
escape velocity:5.387 km/s3.231 km/s54.22 km/s73.02 km/s
year: 326 MCK421.1 days
177 Earth days
269 MCK421.2 days
326 Earth days
465408 MCK421.3 days
77568 Earth days
1042494 MCK421.4 days
173749 Earth days
day:13 hrs29 hrs4 hrs4 hrs
axial tilt:25°
temperature:145 K
-128 C
129 K
-144 C
1959 K
1686 C
1826 K
1553 C
atmosphere:12% H2
2% He
51% N2
35% O2
0% other
84% N2
3% O2
13% CO2
0% other
86% H2
14% He
0% other
83% H2
17% He
0% other
moons:01111163
rings:0000

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