Alpha Mensae
12 Planets (size proportional to Sqrt(Radius))
Sun Rock Water Ice Ice Ice Jovian Jovian Jovian Rock Sub-Jovian Rock Rock See
Key
Stellar charactersistics
Stellar mass 0.87 solar masses
Stellar luminosity 0.83
Age 2.169 billion years
(8.313 billion left on main sequence)
Habitable ecosphere radius 0.911 AU

Planetary Overview
#TypeDist.MassRadius
1 Rock Rock 0.367 AU 0.115 EM 0.493 ER
2 Water Water 0.861 AU 1.638 EM 1.178 ER
3 Ice Ice 1.498 AU 1.524 EM 1.151 ER
4 Ice Ice 2.632 AU 0.768 EM 0.921 ER
5 Ice Ice 3.218 AU 1.810 EM 1.217 ER
6 Jovian Jovian 4.756 AU 433.100 EM 11.200 ER
7 Jovian Jovian 7.590 AU 77.927 EM 7.061 ER
8 Jovian Jovian 11.504 AU 123.627 EM 8.363 ER
9 Rock Rock 17.192 AU 0.035 EM 0.445 ER
10 Sub-Jovian Sub-Jovian 24.424 AU 16.447 EM 4.944 ER
11 Rock Rock 45.222 AU 0.095 EM 0.618 ER
12 Rock Rock 46.249 AU 0.191 EM 0.779 ER

Planet #1 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Hot, Airless, 1-Face
Distance from primary star5.5E+07 KM0.367 AU
Mass6.9E+23Kg0.115 Earth masses
Surface gravity464.9 cm/sec20.47 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature158.1° Celcius
316.6° Fahrenheit		+144.1° C Earth temperature
+259.4° F Earth temperature
Normal temperature range
MinMax
-210.3° C
-346.5° F		 - 357.9° C
676.2° F
Equatorial radius3144.6 Km0.49 Earth radii
Density5.29 grams/cc0.96 Earth densities
Eccentricity of orbit0.090
Escape Velocity 5.4 Km/sec
Molecular weight retained150.5 and above
Axial tilt17°
Planetary albedo 0.07
Exospheric Temperature7839.21° K+6566.21° C Earth temperature
Length of year87.11 Earth days1.00 Local days
Length of day2090.62 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 typeWaterWater
Warm, Cloudy, Thick atmosphere (N2, O2 - breathable)
Distance from primary star1.3E+08 KM0.861 AU
Mass9.8E+24Kg1.638 Earth masses
Surface gravity1156.7 cm/sec21.18 Earth gees
Surface pressure 3084 millibars3.044 Earth atmospheres
Surface temperature 20.2° Celcius
68.3° Fahrenheit		+6.2° C Earth temperature
+11.1° F Earth temperature
+6.5° C greenhouse effect
Normal temperature range
NightDay
17.6° C
63.6° F		 - 22.6° C
72.7° F
MinMax
1.8° C
35.3° F		 - 37.6° C
99.6° F
Equatorial radius7515.4 Km1.2 Earth radii
Density5.51 grams/cc1 Earth densities
Eccentricity of orbit0.097
Escape Velocity13.2 Km/sec
Molecular weight retained 4.6 and aboveN, O, CH4, NH3, H2O, Ne, N2, CO...
Nitrogen 96.7%  2983 mb (ipp: 2923) 
Oxygen  3.2%  100 mb (ipp: 98) 
Axial tilt23°
Planetary albedo 0.52
Exospheric Temperature1425.44° K+152.44° C Earth temperature
Length of year312.83 Earth days516.61 Local days
Length of day14.53 hours
Boiling point of water133.7° Celcius
272.6° Fahrenheit
Hydrosphere percentage96.3
Cloud cover percentage95.3
Ice cover percentage 1.0


Planet #3 Statistics
Planet typeIceIce
Cold, Icy, Arid, Cloudless, Thick atmosphere
Distance from primary star2.2E+08 KM1.498 AU
Mass9.1E+24Kg1.524 Earth masses
Surface gravity1127.4 cm/sec21.15 Earth gees
Surface pressure 2668 millibars2.633 Earth atmospheres
Surface temperature-76.3° Celcius
-105.3° Fahrenheit		-90.3° C Earth temperature
-162.5° F Earth temperature
Normal temperature range
NightDay
-78.1° C
-108.6° F		 - -74.6° C
-102.2° F
MinMax
-91.3° C
-132.4° F		 - -62.2° C
-80.0° F
Equatorial radius7341.8 Km1.2 Earth radii
Density5.49 grams/cc1 Earth densities
Eccentricity of orbit0.015
Escape Velocity12.9 Km/sec
Molecular weight retained 1.6 and aboveH2, He, N, O, CH4, NH3, H2O, Ne...
Axial tilt35°
Planetary albedo 0.69
Exospheric Temperature470.76° K-802.24° C Earth temperature
Length of year718.07 Earth days1206.01 Local days
1.97 Earth years
Length of day14.29 hours
Boiling point of water129.0° Celcius
264.2° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.3
Ice cover percentage98.7


Planet #4 Statistics
Planet typeIceIce
Cold, Icy, Arid, Cloudless, Normal atmosphere
Distance from primary star3.9E+08 KM2.632 AU
Mass4.6E+24Kg0.768 Earth masses
Surface gravity887.1 cm/sec20.90 Earth gees
Surface pressure 677 millibars0.668 Earth atmospheres
Surface temperature-136.5° Celcius
-213.8° Fahrenheit		-150.5° C Earth temperature
-271.0° F Earth temperature
Normal temperature range
NightDay
-139.3° C
-218.7° F		 - -133.9° C
-209.1° F
MinMax
-160.5° C
-256.9° F		 - -114.5° C
-174.1° F
Equatorial radius5875.1 Km0.92 Earth radii
Density5.40 grams/cc0.98 Earth densities
Eccentricity of orbit0.128
Escape Velocity10.2 Km/sec
Molecular weight retained 0.8 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt17°
Planetary albedo 0.70
Exospheric Temperature152.54° K-1120.46° C Earth temperature
Length of year1671.93 Earth days2493.50 Local days
4.58 Earth years
Length of day16.09 hours
Boiling point of water89.4° Celcius
193.0° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage100.0


Planet #5 Statistics
Planet typeIceIce
High-G, Cold, Icy, Arid, Cloudless, Thick atmosphere
Distance from primary star4.8E+08 KM3.218 AU
Mass1.1E+25Kg1.810 Earth masses
Surface gravity1198.3 cm/sec21.22 Earth gees
Surface pressure 3762 millibars3.713 Earth atmospheres
Surface temperature-136.0° Celcius
-212.9° Fahrenheit		-150.0° C Earth temperature
-270.1° F Earth temperature
Normal temperature range
NightDay
-137.1° C
-214.7° F		 - -135.0° C
-211.1° F
MinMax
-149.3° C
-236.8° F		 - -123.7° C
-190.7° F
Equatorial radius7760.1 Km1.2 Earth radii
Density5.53 grams/cc1 Earth densities
Eccentricity of orbit0.122
Escape Velocity13.6 Km/sec
Molecular weight retained 0.3 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt23°
Planetary albedo 0.70
Exospheric Temperature102.03° K-1170.97° C Earth temperature
Length of year2260.54 Earth days3918.64 Local days
6.19 Earth years
Length of day13.84 hours
Boiling point of water140.3° Celcius
284.6° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage100.0


Planet #6 Statistics
Planet typeJovianJovian
Distance from primary star7.1E+08 KM4.756 AU
Mass2.6E+27Kg433.100 Earth masses
32.628 Earth masses dust
400.472 Earth masses gas
Equatorial radius71430.9 Km11 Earth radii
Density1.70 grams/cc0.31 Earth densities
Eccentricity of orbit0.049
Escape Velocity69.5 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt37°
Planetary albedo 0.48
Exospheric Temperature 46.71° K-1226.29° C Earth temperature
Length of year4058.82 Earth days13866.58 Local days
11.11 Earth years
Length of day7.02 hours


Planet #7 Statistics
Planet typeJovianJovian
Distance from primary star1.1E+09 KM7.590 AU
Mass4.7E+26Kg77.927 Earth masses
9.950 Earth masses dust
67.977 Earth masses gas
Equatorial radius45033.9 Km7.1 Earth radii
Density1.22 grams/cc0.22 Earth densities
Eccentricity of orbit0.006
Escape Velocity37.2 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt24°
Planetary albedo 0.53
Exospheric Temperature 18.34° K-1254.66° C Earth temperature
Length of year8187.53 Earth days18819.99 Local days
22.42 Earth years
Length of day10.44 hours


Planet #8 Statistics
Planet typeJovianJovian
Distance from primary star1.7E+09 KM11.504 AU
Mass7.4E+26Kg123.627 Earth masses
11.655 Earth masses dust
111.972 Earth masses gas
Equatorial radius53339.1 Km8.4 Earth radii
Density1.16 grams/cc0.21 Earth densities
Eccentricity of orbit0.046
Escape Velocity43.0 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt26°
Planetary albedo 0.51
Exospheric Temperature 7.98° K-1265.02° C Earth temperature
Length of year15275.82 Earth days37340.18 Local days
41.82 Earth years
Length of day9.82 hours


Planet #9 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star2.6E+09 KM17.192 AU
Mass2.1E+23Kg0.035 Earth masses
Surface gravity174.5 cm/sec20.18 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-211.5° Celcius
-348.7° Fahrenheit		-225.5° C Earth temperature
-405.9° F Earth temperature
Normal temperature range
NightDay
-220.9° C
-365.6° F		 - -202.0° C
-331.6° F
MinMax
-237.1° C
-394.8° F		 - -186.3° C
-303.3° F
Equatorial radius2839.9 Km0.45 Earth radii
Density2.20 grams/cc0.4 Earth densities
Eccentricity of orbit0.005
Escape Velocity 3.1 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt39°
Planetary albedo 0.15
Exospheric Temperature 3.57° K-1269.43° C Earth temperature
Length of year27914.76 Earth days18464.18 Local days
76.43 Earth years
Length of day36.28 hours
Boiling point of water-82.0° Celcius
-115.6° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.0


Planet #10 Statistics
Planet typeSub-JovianSub-Jovian
Distance from primary star3.7E+09 KM24.424 AU
Mass9.8E+25Kg16.447 Earth masses
2.869 Earth masses dust
13.578 Earth masses gas
Equatorial radius31534.5 Km4.9 Earth radii
Density0.75 grams/cc0.14 Earth densities
Eccentricity of orbit0.045
Escape Velocity20.4 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt51°
Planetary albedo 0.46
Exospheric Temperature 1.77° K-1271.23° C Earth temperature
Length of year47265.04 Earth days71278.54 Local days
129.40 Earth years
Length of day15.91 hours


Planet #11 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star6.8E+09 KM45.222 AU
Mass5.7E+23Kg0.095 Earth masses
Surface gravity243.3 cm/sec20.25 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-235.1° Celcius
-391.2° Fahrenheit		-249.1° C Earth temperature
-448.4° F Earth temperature
Normal temperature range
NightDay
-240.0° C
-400.0° F		 - -230.0° C
-382.0° F
MinMax
-254.9° C
-426.9° F		 - -214.7° C
-354.4° F
Equatorial radius3939.0 Km0.62 Earth radii
Density2.21 grams/cc0.4 Earth densities
Eccentricity of orbit0.118
Escape Velocity 4.4 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt44°
Planetary albedo 0.15
Exospheric Temperature 0.52° K-1272.48° C Earth temperature
Length of year119085.71 Earth days93012.33 Local days
326.03 Earth years
Length of day30.73 hours
Boiling point of water-66.5° Celcius
-87.8° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.1


Planet #12 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star6.9E+09 KM46.249 AU
Mass1.1E+24Kg0.191 Earth masses
Surface gravity308.8 cm/sec20.31 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-235.5° Celcius
-391.8° Fahrenheit		-249.5° C Earth temperature
-449.0° F Earth temperature
Normal temperature range
NightDay
-239.9° C
-399.7° F		 - -230.9° C
-383.7° F
MinMax
-253.6° C
-424.4° F		 - -217.2° C
-359.0° F
Equatorial radius4967.8 Km0.78 Earth radii
Density2.22 grams/cc0.4 Earth densities
Eccentricity of orbit0.041
Escape Velocity 5.5 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt47°
Planetary albedo 0.15
Exospheric Temperature 0.49° K-1272.51° C Earth temperature
Length of year123165.63 Earth days108384.85 Local days
337.20 Earth years
Length of day27.27 hours
Boiling point of water-53.9° Celcius
-65.1° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.1


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