Alpha Mensae
11 Planets (size proportional to Sqrt(Radius))
Sun Rock Rock Rock Water Martian Ice Jovian Martian Jovian Sub-Jovian Rock See
Key
Stellar charactersistics
Stellar mass 0.87 solar masses
Stellar luminosity 0.83
Age 3.730 billion years
(6.752 billion left on main sequence)
Habitable ecosphere radius 0.911 AU

Planetary Overview
#TypeDist.MassRadius
1 Rock Rock 0.325 AU 0.092 EM 0.456 ER
2 Rock Rock 0.495 AU 0.008 EM 0.201 ER
3 Rock Rock 0.597 AU 0.186 EM 0.575 ER
4 Water Water 0.873 AU 1.564 EM 1.156 ER
5 Martian Martian 1.307 AU 1.844 EM 1.219 ER
6 Ice Ice 2.479 AU 1.388 EM 1.112 ER
7 Jovian Jovian 4.130 AU 460.615 EM 11.269 ER
8 Martian Martian 6.940 AU 1.026 EM 1.342 ER
9 Jovian Jovian 14.009 AU 411.457 EM 12.073 ER
10 Sub-Jovian Sub-Jovian 32.213 AU 6.657 EM 3.886 ER
11 Rock Rock 43.665 AU 0.096 EM 0.618 ER

Planet #1 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Hot, Airless, 1-Face
Distance from primary star4.9E+07 KM0.325 AU
Mass5.5E+23Kg0.092 Earth masses
Surface gravity434.6 cm/sec20.44 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature176.6° Celcius
349.8° Fahrenheit		+162.6° C Earth temperature
+292.6° F Earth temperature
Normal temperature range
MinMax
-203.1° C
-333.7° F		 - 380.1° C
716.2° F
Equatorial radius2907.7 Km0.46 Earth radii
Density5.35 grams/cc0.97 Earth densities
Eccentricity of orbit0.002
Escape Velocity 5.0 Km/sec
Molecular weight retained244.7 and above
Axial tilt18°
Planetary albedo 0.07
Exospheric Temperature10032.87° K+8759.87° C Earth temperature
Length of year72.39 Earth days1.00 Local days
Length of day1737.44 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 star7.4E+07 KM0.495 AU
Mass4.7E+22Kg0.008 Earth masses
Surface gravity190.9 cm/sec20.19 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature 90.9° Celcius
195.7° Fahrenheit		+76.9° C Earth temperature
+138.5° F Earth temperature
Normal temperature range
MinMax
-224.9° C
-372.8° F		 - 274.4° C
526.0° F
Equatorial radius1284.9 Km0.2 Earth radii
Density5.32 grams/cc0.96 Earth densities
Eccentricity of orbit0.093
Escape Velocity 2.2 Km/sec
Molecular weight retained541.5 and above
Axial tilt26°
Planetary albedo 0.07
Exospheric Temperature4310.53° K+3037.53° C Earth temperature
Length of year136.42 Earth days1.00 Local days
Length of day3274.02 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
Resonant Spin Locked
Low-G, Hot, Airless, 1-Face
Distance from primary star8.9E+07 KM0.597 AU
Mass1.1E+24Kg0.186 Earth masses
Surface gravity550.6 cm/sec20.56 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature 58.4° Celcius
137.1° Fahrenheit		+44.4° C Earth temperature
+79.9° F Earth temperature
Normal temperature range
MinMax
-229.4° C
-381.0° F		 - 233.3° C
451.9° F
Equatorial radius3668.3 Km0.58 Earth radii
Density5.37 grams/cc0.97 Earth densities
Eccentricity of orbit0.103
Escape Velocity 6.4 Km/sec
Molecular weight retained45.2 and aboveNO2, O3, SO2, SO3, Kr, Xe
Axial tilt20°
Planetary albedo 0.07
Exospheric Temperature2962.96° K+1689.96° C Earth temperature
Length of year180.71 Earth days1.23 Local days
Length of day3526.56 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 typeWaterWater
Warm, Cloudy, Thick atmosphere (N2, O2 - breathable)
Distance from primary star1.3E+08 KM0.873 AU
Mass9.3E+24Kg1.564 Earth masses
Surface gravity1147.0 cm/sec21.17 Earth gees
Surface pressure 2849 millibars2.812 Earth atmospheres
Surface temperature 17.5° Celcius
63.4° Fahrenheit		+3.5° C Earth temperature
+6.2° F Earth temperature
Normal temperature range
NightDay
14.7° C
58.5° F		 - 20.0° C
68.0° F
MinMax
-2.1° C
28.2° F		 - 36.0° C
96.8° F
Equatorial radius7374.6 Km1.2 Earth radii
Density5.57 grams/cc1 Earth densities
Eccentricity of orbit0.122
Escape Velocity13.0 Km/sec
Molecular weight retained 5.1 and aboveN, O, CH4, NH3, H2O, Ne, N2, CO...
Nitrogen 90.9%  2591 mb (ipp: 2534) 
Oxygen  8.3%  237 mb (ipp: 232) 
Argon  0.7%  20 mb (ipp: 20) 
Axial tilt17°
Planetary albedo 0.47
Exospheric Temperature1386.16° K+113.16° C Earth temperature
Length of year319.45 Earth days514.67 Local days
Length of day14.90 hours
Boiling point of water131.1° Celcius
268.0° Fahrenheit
Hydrosphere percentage95.5
Cloud cover percentage86.2
Ice cover percentage 1.2


Planet #5 Statistics
Planet typeMartianMartian
High-G, Cold, Icy, Arid, Few clouds, Thick atmosphere (He - unbreathable)
Distance from primary star2E+08 KM1.307 AU
Mass1.1E+25Kg1.844 Earth masses
Surface gravity1216.0 cm/sec21.24 Earth gees
Surface pressure 3958 millibars3.906 Earth atmospheres
Surface temperature -7.9° Celcius
17.7° Fahrenheit		-21.9° C Earth temperature
-39.5° F Earth temperature
+50.2° C greenhouse effect
Normal temperature range
NightDay
-9.9° C
14.2° F		 - -6.1° C
21.1° F
MinMax
-23.8° C
-10.8° F		 - 7.1° C
44.7° F
Equatorial radius7775.9 Km1.2 Earth radii
Density5.60 grams/cc1 Earth densities
Eccentricity of orbit0.125
Escape Velocity13.8 Km/sec
Molecular weight retained 2.0 and aboveHe, N, O, CH4, NH3, H2O, Ne, N2...
Helium 99.8%  3950 mb (ipp: 3887) 
Nitrogen  0.2%  8 mb (ipp: 8) 
Axial tilt27°
Planetary albedo 0.26
Exospheric Temperature618.40° K-654.60° C Earth temperature
Length of year585.21 Earth days1017.97 Local days
1.60 Earth years
Length of day13.80 hours
Boiling point of water142.0° Celcius
287.7° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage14.2
Ice cover percentage17.9


Planet #6 Statistics
Planet typeIceIce
Cold, Icy, Arid, Cloudless, Thick atmosphere
Distance from primary star3.7E+08 KM2.479 AU
Mass8.3E+24Kg1.388 Earth masses
Surface gravity1099.6 cm/sec21.12 Earth gees
Surface pressure 2243 millibars2.214 Earth atmospheres
Surface temperature-125.7° Celcius
-194.3° Fahrenheit		-139.7° C Earth temperature
-251.5° F Earth temperature
+20.6° C greenhouse effect
Normal temperature range
NightDay
-127.2° C
-197.0° F		 - -124.3° C
-191.7° F
MinMax
-140.1° C
-220.1° F		 - -112.4° C
-170.4° F
Equatorial radius7095.0 Km1.1 Earth radii
Density5.55 grams/cc1 Earth densities
Eccentricity of orbit0.013
Escape Velocity12.5 Km/sec
Molecular weight retained 0.7 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt38°
Planetary albedo 0.70
Exospheric Temperature171.87° K-1101.13° C Earth temperature
Length of year1528.88 Earth days2538.56 Local days
4.19 Earth years
Length of day14.45 hours
Boiling point of water123.5° Celcius
254.3° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage100.0


Planet #7 Statistics
Planet typeJovianJovian
Distance from primary star6.2E+08 KM4.130 AU
Mass2.8E+27Kg460.615 Earth masses
35.787 Earth masses dust
424.829 Earth masses gas
Equatorial radius71875.5 Km11 Earth radii
Density1.77 grams/cc0.32 Earth densities
Eccentricity of orbit0.097
Escape Velocity71.5 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt30°
Planetary albedo 0.51
Exospheric Temperature 61.94° K-1211.06° C Earth temperature
Length of year3284.34 Earth days11500.01 Local days
8.99 Earth years
Length of day6.85 hours


Planet #8 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Normal atmosphere
Distance from primary star1E+09 KM6.940 AU
Mass6.1E+24Kg1.026 Earth masses
Surface gravity558.1 cm/sec20.57 Earth gees
Surface pressure 657 millibars0.648 Earth atmospheres
Surface temperature-173.4° Celcius
-280.2° Fahrenheit		-187.4° C Earth temperature
-337.4° F Earth temperature
Normal temperature range
NightDay
-176.0° C
-284.7° F		 - -171.1° C
-275.9° F
MinMax
-192.4° C
-314.3° F		 - -156.2° C
-249.2° F
Equatorial radius8562.0 Km1.3 Earth radii
Density2.33 grams/cc0.42 Earth densities
Eccentricity of orbit0.108
Escape Velocity 9.8 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt46°
Planetary albedo 0.36
Exospheric Temperature 21.94° K-1251.06° C Earth temperature
Length of year7159.33 Earth days8470.08 Local days
19.60 Earth years
Length of day20.29 hours
Boiling point of water88.6° Celcius
191.5° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage37.3


Planet #9 Statistics
Planet typeJovianJovian
Distance from primary star2.1E+09 KM14.009 AU
Mass2.5E+27Kg411.457 Earth masses
24.783 Earth masses dust
386.674 Earth masses gas
Equatorial radius76999.4 Km12 Earth radii
Density1.29 grams/cc0.23 Earth densities
Eccentricity of orbit0.191
Escape Velocity65.3 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt43°
Planetary albedo 0.50
Exospheric Temperature 5.38° K-1267.62° C Earth temperature
Length of year20517.39 Earth days63380.93 Local days
56.17 Earth years
Length of day7.77 hours


Planet #10 Statistics
Planet typeSub-JovianSub-Jovian
Distance from primary star4.8E+09 KM32.213 AU
Mass4E+25Kg6.657 Earth masses
1.750 Earth masses dust
4.908 Earth masses gas
Equatorial radius24788.1 Km3.9 Earth radii
Density0.62 grams/cc0.11 Earth densities
Eccentricity of orbit0.087
Escape Velocity14.6 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt36°
Planetary albedo 0.52
Exospheric Temperature 1.02° K-1271.98° C Earth temperature
Length of year71592.83 Earth days87385.89 Local days
196.01 Earth years
Length of day19.66 hours


Planet #11 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star6.5E+09 KM43.665 AU
Mass5.7E+23Kg0.096 Earth masses
Surface gravity246.5 cm/sec20.25 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-235.2° Celcius
-391.3° Fahrenheit		-249.2° C Earth temperature
-448.5° F Earth temperature
Normal temperature range
NightDay
-240.1° C
-400.1° F		 - -230.1° C
-382.3° F
MinMax
-251.1° C
-420.0° F		 - -219.4° C
-362.9° F
Equatorial radius3944.0 Km0.62 Earth radii
Density2.24 grams/cc0.41 Earth densities
Eccentricity of orbit0.046
Escape Velocity 4.4 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt64°
Planetary albedo 0.15
Exospheric Temperature 0.55° K-1272.45° C Earth temperature
Length of year112987.73 Earth days88840.25 Local days
309.34 Earth years
Length of day30.52 hours
Boiling point of water-66.2° Celcius
-87.1° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.1


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