Alpha Centauri A
7 Planets (size proportional to Sqrt(Radius))
Sun Rock Rock Rock Venusian Terrestrial Martian Jovian See
Key
Stellar charactersistics
Stellar mass 1.09 solar masses
Stellar luminosity 1.60
Age 5.350 billion years
(1.462 billion left on main sequence)
Habitable ecosphere radius 1.265 AU

Planetary Overview
#TypeDist.MassRadius
1 Rock Rock 0.345 AU 0.051 EM 0.375 ER
2 Rock Rock 0.437 AU 0.033 EM 0.323 ER
3 Rock Rock 0.514 AU 0.383 EM 0.730 ER
4 Venusian Venusian 0.863 AU 1.018 EM 1.006 ER
5 Terrestrial Terrestrial 1.224 AU 1.757 EM 1.200 ER
6 Martian Martian 1.710 AU 1.617 EM 1.169 ER
7 Jovian Jovian 2.535 AU 43.687 EM 5.296 ER

Planet #1 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Hot, Airless, 1-Face
Distance from primary star5.2E+07 KM0.345 AU
Mass3.1E+23Kg0.051 Earth masses
Surface gravity356.9 cm/sec20.36 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature240.8° Celcius
465.4° Fahrenheit		+226.8° C Earth temperature
+408.2° F Earth temperature
Normal temperature range
NightDay
-182.7° C
-296.8° F		 - 455.9° C
852.6° F
MinMax
-192.9° C
-315.2° F		 - 458.9° C
858.1° F
Equatorial radius2393.7 Km0.38 Earth radii
Density5.34 grams/cc0.97 Earth densities
Eccentricity of orbit0.044
Escape Velocity 4.1 Km/sec
Molecular weight retained623.6 and above
Axial tilt25°
Planetary albedo 0.07
Exospheric Temperature17114.38° K+15841.38° C Earth temperature
Length of year70.89 Earth days1.00 Local days
Length of day1701.32 hours
Boiling point of water-273.1° Celcius
-459.7° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.0


Planet #2 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Hot, Airless, 1-Face
Distance from primary star6.5E+07 KM0.437 AU
Mass1.9E+23Kg0.033 Earth masses
Surface gravity306.4 cm/sec20.31 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature183.6° Celcius
362.4° Fahrenheit		+169.6° C Earth temperature
+305.2° F Earth temperature
Normal temperature range
MinMax
-208.1° C
-342.7° F		 - 389.4° C
732.8° F
Equatorial radius2057.8 Km0.32 Earth radii
Density5.33 grams/cc0.97 Earth densities
Eccentricity of orbit0.009
Escape Velocity 3.6 Km/sec
Molecular weight retained526.9 and above
Axial tilt22°
Planetary albedo 0.07
Exospheric Temperature10672.27° K+9399.27° C Earth temperature
Length of year101.02 Earth days1.00 Local days
Length of day2424.45 hours
Boiling point of water-273.1° Celcius
-459.7° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.0


Planet #3 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Hot, Airless, 1-Face
Distance from primary star7.7E+07 KM0.514 AU
Mass2.3E+24Kg0.383 Earth masses
Surface gravity703.8 cm/sec20.72 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature147.9° Celcius
298.2° Fahrenheit		+133.9° C Earth temperature
+241.0° F Earth temperature
Normal temperature range
MinMax
-216.3° C
-357.3° F		 - 345.5° C
653.9° F
Equatorial radius4656.1 Km0.73 Earth radii
Density5.41 grams/cc0.98 Earth densities
Eccentricity of orbit0.024
Escape Velocity 8.1 Km/sec
Molecular weight retained73.3 and aboveSO3, Kr, Xe
Axial tilt25°
Planetary albedo 0.07
Exospheric Temperature7706.56° K+6433.56° C Earth temperature
Length of year128.96 Earth days1.00 Local days
Length of day3095.00 hours
Boiling point of water-273.1° Celcius
-459.7° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.0


Planet #4 Statistics
Planet typeVenusianVenusian
Hot, Arid, Cloudy, Unbreathably thick atmosphere
Distance from primary star1.3E+08 KM0.863 AU
Mass6.1E+24Kg1.018 Earth masses
Surface gravity986.2 cm/sec21.01 Earth gees
Surface pressure134751 millibars132.989 Earth atmospheres
Surface temperature829.8° Celcius
1525.6° Fahrenheit		+815.8° C Earth temperature
+1468.4° F Earth temperature
+722.9° C greenhouse effect (GH)
Normal temperature range
MinMax
820.5° C
1509.0° F		 - 831.4° C
1528.4° F
Equatorial radius6415.1 Km1 Earth radii
Density5.50 grams/cc1 Earth densities
Eccentricity of orbit0.001
Escape Velocity11.2 Km/sec
Molecular weight retained13.5 and aboveN, O, CH4, NH3, H2O, Ne, N2, CO...
Axial tilt24°
Planetary albedo 0.52
Exospheric Temperature2733.69° K+1460.69° C Earth temperature
Length of year280.56 Earth days365.31 Local days
Length of day18.43 hours
Boiling point of water311.6° Celcius
592.9° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage100.0
Ice cover percentage 0.0


Planet #5 Statistics
Planet typeTerrestrialTerrestrial
High-G, Warm, Cloudy, Thick atmosphere (N2, O2, Ar - breathable)
Distance from primary star1.8E+08 KM1.224 AU
Mass1.1E+25Kg1.757 Earth masses
Surface gravity1195.4 cm/sec21.22 Earth gees
Surface pressure 2869 millibars2.832 Earth atmospheres
Surface temperature 19.5° Celcius
67.1° Fahrenheit		+5.5° C Earth temperature
+9.9° F Earth temperature
Normal temperature range
NightDay
16.9° C
62.4° F		 - 21.9° C
71.5° F
MinMax
0.9° C
33.6° F		 - 37.2° C
98.9° F
Equatorial radius7656.4 Km1.2 Earth radii
Density5.59 grams/cc1 Earth densities
Eccentricity of orbit0.063
Escape Velocity13.5 Km/sec
Molecular weight retained 4.6 and aboveN, O, CH4, NH3, H2O, Ne, N2, CO...
Nitrogen 93.5%  2682 mb (ipp: 2623) 
Oxygen  5.5%  157 mb (ipp: 153) 
Argon  1.0%  29 mb (ipp: 29) 
Axial tilt17°
Planetary albedo 0.45
Exospheric Temperature1359.49° K+86.49° C Earth temperature
Length of year473.76 Earth days809.19 Local days
1.30 Earth years
Length of day14.05 hours
Boiling point of water131.3° Celcius
268.4° Fahrenheit
Hydrosphere percentage79.4
Cloud cover percentage82.2
Ice cover percentage 1.0


Planet #6 Statistics
Planet typeMartianMartian
Cold, Icy, Arid, Cloudless, Thick atmosphere (He - unbreathable)
Distance from primary star2.6E+08 KM1.710 AU
Mass9.7E+24Kg1.617 Earth masses
Surface gravity1160.5 cm/sec21.18 Earth gees
Surface pressure 2428 millibars2.396 Earth atmospheres
Surface temperature-12.4° Celcius
9.7° Fahrenheit		-26.4° C Earth temperature
-47.5° F Earth temperature
Normal temperature range
NightDay
-14.9° C
5.2° F		 - -10.0° C
14.0° F
MinMax
-30.3° C
-22.6° F		 - 4.6° C
40.3° F
Equatorial radius7453.2 Km1.2 Earth radii
Density5.57 grams/cc1 Earth densities
Eccentricity of orbit0.000
Escape Velocity13.2 Km/sec
Molecular weight retained 2.5 and aboveHe, N, O, CH4, NH3, H2O, Ne, N2...
Helium 99.7%  2422 mb (ipp: 2359) 
Nitrogen  0.3%  6 mb (ipp: 6) 
Axial tilt22°
Planetary albedo 0.29
Exospheric Temperature696.84° K-576.16° C Earth temperature
Length of year782.07 Earth days1331.55 Local days
2.14 Earth years
Length of day14.10 hours
Boiling point of water126.0° Celcius
258.8° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 8.3
Ice cover percentage24.3


Planet #7 Statistics
Planet typeJovianJovian
Distance from primary star3.8E+08 KM2.535 AU
Mass2.6E+26Kg43.687 Earth masses
9.366 Earth masses dust
34.321 Earth masses gas
Equatorial radius33780.5 Km5.3 Earth radii
Density1.62 grams/cc0.29 Earth densities
Eccentricity of orbit0.040
Escape Velocity32.1 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt37°
Planetary albedo 0.54
Exospheric Temperature316.98° K-956.02° C Earth temperature
Length of year1411.87 Earth days3239.41 Local days
3.87 Earth years
Length of day10.46 hours


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