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LKH557: red giant star with 9 planets

  LKH557.1   LKH557.2   LKH557.3   LKH557.4   LKH557.5  
LKH557.6
 
LKH557.7
 
LKH557.8
  LKH557.9  

Solar system 'LKH557' comprises the star 'LKH557' and the retinue of celestial objects gravitationally bound to it: 9 planets and their 453 moons, as well as asteroids, meteoroids, planetoids, comets, and interplanetary dust.

The principal component of this star system is the star 'LKH557', a red giant class star that contains about 99.92% of the system's known mass and dominates it gravitationally. LKH557 is located more than 2585 lightyears from the center of the galaxy.

This solar system comprises 9 planets

LKH557.1 is a very small terrestrial planet (2663 km radius) which orbits its star in 58 Earth days, one day on LKH557.1 lasts 44 Earth hours. Its average temperature is 1763 K (1490 C), its atmosphere mainly consists of nitrogen and it has 0 moons.
LKH557.2 is a very large terrestrial planet (10816 km radius) which orbits its star in 774 Earth days, one day on LKH557.2 lasts 11 Earth hours. Its average temperature is 899 K (626 C), its atmosphere mainly consists of nitrogen, oxygen and it has 28 moons.
LKH557.3 is a small terrestrial planet (4860 km radius) which orbits its star in 1423 Earth days, one day on LKH557.3 lasts 19 Earth hours. Its average temperature is 599 K (326 C), its atmosphere mainly consists of nitrogen and it has 2 moons.
LKH557.4 is a medium terrestrial planet (6327 km radius) which orbits its star in 2614 Earth days, one day on LKH557.4 lasts 15 Earth hours. Its average temperature is 355 K (82 C), its atmosphere mainly consists of nitrogen, oxygen and it has 29 moons.
LKH557.5 is a very large terrestrial planet (11391 km radius) which orbits its star in 4803 Earth days, one day on LKH557.5 lasts 10 Earth hours. Its average temperature is 197 K (-76 C), its atmosphere mainly consists of nitrogen, oxygen and it has 21 moons.
LKH557.6 is a small gas giant (18950 km radius) which orbits its star in 9468 Earth days, one day on LKH557.6 lasts 9 Earth hours. Its average temperature is 1976 K (1703 C), its atmosphere mainly consists of hydrogen and it has 111 moons.
LKH557.7 is a medium gas giant (24903 km radius) which orbits its star in 25109 Earth days, one day on LKH557.7 lasts 9 Earth hours. Its average temperature is 1076 K (803 C), its atmosphere mainly consists of hydrogen, helium and it has 154 moons.
LKH557.8 is a large gas giant (77074 km radius) which orbits its star in 46128 Earth days, one day on LKH557.8 lasts 9 Earth hours. Its average temperature is 1243 K (970 C), its atmosphere mainly consists of hydrogen, helium and it has 44 moons.
LKH557.9 is a medium terrestrial planet (6974 km radius) which orbits its star in 60637 Earth days, one day on LKH557.9 lasts 14 Earth hours. Its average temperature is 1687 K (1414 C), its atmosphere mainly consists of and it has 64 moons.
More planetary details...

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Planetary Orbits

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Planetary Statistics

planet:LKH557.1LKH557.2LKH557.3LKH557.4LKH557.5
distance from star:20*106 km114*106 km171*106 km257*106 km386*106 km
radius:2663 km10816 km4860 km6327 km11391 km
mass:151*1021 kg10122*1021 kg918*1021 kg2026*1021 kg11824*1021 kg
surface gravity: 1.42 m/s2
0.14 Earths
5.77 m/s2
0.58 Earths
2.59 m/s2
0.26 Earths
3.37 m/s2
0.34 Earths
6.08 m/s2
0.62 Earths
escape velocity:2.751 km/s11.17 km/s5.021 km/s6.537 km/s11.77 km/s
year: 31 LKH557.1 days
58 Earth days
1688 LKH557.2 days
774 Earth days
1797 LKH557.3 days
1423 Earth days
4182 LKH557.4 days
2614 Earth days
11527 LKH557.5 days
4803 Earth days
day:44 hrs11 hrs19 hrs15 hrs10 hrs
axial tilt:15°20°31°
temperature:1763 K
1490 C
899 K
626 C
599 K
326 C
355 K
82 C
197 K
-76 C
atmosphere:89% N2
9% O2
2% CO2
0% other
5% H2
2% He
49% N2
44% O2
0% other
92% N2
1% O2
7% CO2
0% other
1% He
58% N2
39% O2
2% CO2
0% other
4% H2
1% He
64% N2
30% O2
1% CO2
0% other
moons:02822921
rings:00000

planet:LKH557.6LKH557.7LKH557.8LKH557.9
distance from star:608*106 km1165*106 km1747*106 km2097*106 km
radius:18950 km24903 km77074 km6974 km
mass:54439*1021 kg123550*1021 kg3662804*1021 kg2713*1021 kg
surface gravity: 10.1 m/s2
1.03 Earths
13.2 m/s2
1.34 Earths
41.1 m/s2
4.20 Earths
3.72 m/s2
0.38 Earths
escape velocity:19.58 km/s25.73 km/s79.64 km/s7.206 km/s
year: 25248 LKH557.6 days
9468 Earth days
66957 LKH557.7 days
25109 Earth days
123008 LKH557.8 days
46128 Earth days
103949 LKH557.9 days
60637 Earth days
day:9 hrs9 hrs9 hrs14 hrs
axial tilt:10°
temperature:1976 K
1703 C
1076 K
803 C
1243 K
970 C
1687 K
1414 C
atmosphere:91% H2
9% He
0% other
81% H2
19% He
0% other
83% H2
17% He
0% other
100% other
moons:1111544464
rings:14930

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