40 Eridani A
17 Planets (size proportional to Sqrt(Radius))
Sun Rock Terrestrial Martian Rock Ice Ice Sub-Jovian Martian Jovian Jovian Rock Sub-Jovian Rock Asteroids Rock Rock Rock See
Key
Stellar charactersistics
Stellar mass 0.75 solar masses
Stellar luminosity 0.38
Age 5.803 billion years
(13.934 billion left on main sequence)
Habitable ecosphere radius 0.616 AU

Planetary Overview
#TypeDist.MassRadius
1 Rock Rock 0.401 AU 0.074 EM 0.424 ER
2 Terrestrial Terrestrial 0.583 AU 0.739 EM 0.906 ER
3 Martian Martian 0.804 AU 0.204 EM 0.593 ER
4 Rock Rock 1.023 AU 0.008 EM 0.205 ER
5 Ice Ice 1.435 AU 1.370 EM 1.108 ER
6 Ice Ice 2.388 AU 0.588 EM 0.841 ER
7 Sub-Jovian Sub-Jovian 2.912 AU 5.482 EM 3.105 ER
8 Martian Martian 5.078 AU 1.665 EM 1.567 ER
9 Jovian Jovian 8.161 AU 206.339 EM 9.749 ER
10 Jovian Jovian 17.186 AU 30.939 EM 5.964 ER
11 Rock Rock 27.078 AU 0.019 EM 0.358 ER
12 Sub-Jovian Sub-Jovian 28.991 AU 2.213 EM 2.886 ER
13 Rock Rock 35.814 AU 0.152 EM 0.720 ER
14 Asteroids Asteroids 53.892 AU 0.000 EM 0.036 ER
15 Rock Rock 60.210 AU 0.052 EM 0.504 ER
16 Rock Rock 71.703 AU 0.006 EM 0.239 ER
17 Rock Rock 101.049 AU 0.005 EM 0.224 ER

Planet #1 Statistics
Planet typeRockRock
Resonant Spin Locked
Low-G, Hot, Airless, 1-Face
Distance from primary star6E+07 KM0.401 AU
Mass4.4E+23Kg0.074 Earth masses
Surface gravity403.3 cm/sec20.41 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature 59.7° Celcius
139.5° Fahrenheit		+45.7° C Earth temperature
+82.3° F Earth temperature
Normal temperature range
NightDay
-212.6° C
-350.7° F		 - 229.9° C
445.7° F
MinMax
-223.4° C
-370.2° F		 - 234.3° C
453.7° F
Equatorial radius2701.5 Km0.42 Earth radii
Density5.34 grams/cc0.97 Earth densities
Eccentricity of orbit0.182
Escape Velocity 4.7 Km/sec
Molecular weight retained86.3 and aboveXe
Axial tilt13°
Planetary albedo 0.07
Exospheric Temperature3011.39° K+1738.39° C Earth temperature
Length of year107.02 Earth days1.45 Local days
Length of day1775.74 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 typeTerrestrialTerrestrial
Resonant Spin Locked
Wet (N2, O2, Ar - breathable), 1-Face
Distance from primary star8.7E+07 KM0.583 AU
Mass4.4E+24Kg0.739 Earth masses
Surface gravity882.5 cm/sec20.90 Earth gees
Surface pressure 738 millibars0.728 Earth atmospheres
Surface temperature 13.7° Celcius
56.7° Fahrenheit		-0.3° C Earth temperature
-0.5° F Earth temperature
Normal temperature range
NightDay
-131.6° C
-204.9° F		 - 64.5° C
148.1° F
MinMax
-151.8° C
-241.2° F		 - 88.2° C
190.7° F
Equatorial radius5779.5 Km0.91 Earth radii
Density5.46 grams/cc0.99 Earth densities
Eccentricity of orbit0.177
Escape Velocity10.1 Km/sec
Molecular weight retained 8.7 and aboveN, O, CH4, NH3, H2O, Ne, N2, CO...
Nitrogen 74.8%  552 mb (ipp: 505) 
Oxygen 23.8%  175 mb (ipp: 161) 
Argon  1.4%  10 mb (ipp: 9) 
Axial tilt28°
Planetary albedo 0.33
Exospheric Temperature1421.65° K+148.65° C Earth temperature
Length of year187.90 Earth days1.43 Local days
Length of day3153.51 hours
Boiling point of water91.7° Celcius
197.0° Fahrenheit
Hydrosphere percentage85.2
Cloud cover percentage58.4
Ice cover percentage 2.4


Planet #3 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Unbreathably thin atmosphere
Distance from primary star1.2E+08 KM0.804 AU
Mass1.2E+24Kg0.204 Earth masses
Surface gravity568.0 cm/sec20.58 Earth gees
Surface pressure 56 millibars0.055 Earth atmospheres
Surface temperature-75.8° Celcius
-104.4° Fahrenheit		-89.8° C Earth temperature
-161.6° F Earth temperature
Normal temperature range
NightDay
-99.6° C
-147.4° F		 - -53.2° C
-63.7° F
MinMax
-123.9° C
-191.0° F		 - -29.4° C
-21.0° F
Equatorial radius3781.9 Km0.59 Earth radii
Density5.37 grams/cc0.97 Earth densities
Eccentricity of orbit0.019
Escape Velocity 6.6 Km/sec
Molecular weight retained10.9 and aboveN, O, CH4, NH3, H2O, Ne, N2, CO...
Axial tilt26°
Planetary albedo 0.60
Exospheric Temperature748.63° K-524.37° C Earth temperature
Length of year303.97 Earth days176.50 Local days
Length of day41.33 hours
Boiling point of water34.4° Celcius
93.9° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.4
Ice cover percentage82.3


Planet #4 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Cold, Airless, 1-Face
Distance from primary star1.5E+08 KM1.023 AU
Mass5E+22Kg0.008 Earth masses
Surface gravity194.2 cm/sec20.20 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-64.8° Celcius
-84.6° Fahrenheit		-78.8° C Earth temperature
-141.8° F Earth temperature
Normal temperature range
MinMax
-244.1° C
-407.3° F		 - 72.3° C
162.1° F
Equatorial radius1306.9 Km0.2 Earth radii
Density5.32 grams/cc0.96 Earth densities
Eccentricity of orbit0.003
Escape Velocity 2.3 Km/sec
Molecular weight retained56.9 and aboveSO2, SO3, Kr, Xe
Axial tilt28°
Planetary albedo 0.07
Exospheric Temperature462.65° K-810.35° C Earth temperature
Length of year436.10 Earth days1.00 Local days
1.19 Earth years
Length of day10466.41 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 #5 Statistics
Planet typeIceIce
Cold, Icy, Arid, Cloudless, Thick atmosphere
Distance from primary star2.1E+08 KM1.435 AU
Mass8.2E+24Kg1.370 Earth masses
Surface gravity1094.5 cm/sec21.12 Earth gees
Surface pressure 2535 millibars2.502 Earth atmospheres
Surface temperature-112.4° Celcius
-170.2° Fahrenheit		-126.4° C Earth temperature
-227.4° F Earth temperature
Normal temperature range
NightDay
-113.9° C
-173.0° F		 - -110.9° C
-167.6° F
MinMax
-127.4° C
-197.3° F		 - -98.4° C
-145.1° F
Equatorial radius7065.0 Km1.1 Earth radii
Density5.54 grams/cc1 Earth densities
Eccentricity of orbit0.024
Escape Velocity12.4 Km/sec
Molecular weight retained 1.0 and aboveH2, He, N, O, CH4, NH3, H2O, Ne...
Axial tilt26°
Planetary albedo 0.70
Exospheric Temperature234.94° K-1038.06° C Earth temperature
Length of year724.94 Earth days1197.11 Local days
1.98 Earth years
Length of day14.53 hours
Boiling point of water127.4° Celcius
261.3° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.1
Ice cover percentage100.0


Planet #6 Statistics
Planet typeIceIce
Cold, Icy, Arid, Cloudless, Thin atmosphere
Distance from primary star3.6E+08 KM2.388 AU
Mass3.5E+24Kg0.588 Earth masses
Surface gravity815.3 cm/sec20.83 Earth gees
Surface pressure 466 millibars0.460 Earth atmospheres
Surface temperature-159.3° Celcius
-254.7° Fahrenheit		-173.3° C Earth temperature
-311.9° F Earth temperature
Normal temperature range
NightDay
-162.1° C
-259.8° F		 - -156.6° C
-249.9° F
MinMax
-181.0° C
-293.8° F		 - -139.5° C
-219.0° F
Equatorial radius5360.9 Km0.84 Earth radii
Density5.44 grams/cc0.99 Earth densities
Eccentricity of orbit0.070
Escape Velocity 9.3 Km/sec
Molecular weight retained 0.7 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt34°
Planetary albedo 0.70
Exospheric Temperature 84.80° K-1188.20° C Earth temperature
Length of year1556.75 Earth days2225.23 Local days
4.26 Earth years
Length of day16.79 hours
Boiling point of water79.9° Celcius
175.9° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage100.0


Planet #7 Statistics
Planet typeSub-JovianSub-Jovian
Distance from primary star4.4E+08 KM2.912 AU
Mass3.3E+25Kg5.482 Earth masses
3.918 Earth masses dust
1.564 Earth masses gas
Equatorial radius19806.0 Km3.1 Earth radii
Density1.01 grams/cc0.18 Earth densities
Eccentricity of orbit0.086
Escape Velocity14.9 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt26°
Planetary albedo 0.50
Exospheric Temperature 57.04° K-1215.96° C Earth temperature
Length of year2096.01 Earth days2905.62 Local days
5.74 Earth years
Length of day17.31 hours


Planet #8 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Normal atmosphere
Distance from primary star7.6E+08 KM5.078 AU
Mass1E+25Kg1.665 Earth masses
Surface gravity664.7 cm/sec20.68 Earth gees
Surface pressure 2005 millibars1.979 Earth atmospheres
Surface temperature-174.5° Celcius
-282.2° Fahrenheit		-188.5° C Earth temperature
-339.4° F Earth temperature
Normal temperature range
NightDay
-175.9° C
-284.6° F		 - -173.3° C
-279.9° F
MinMax
-189.1° C
-308.4° F		 - -161.3° C
-258.4° F
Equatorial radius9994.6 Km1.6 Earth radii
Density2.38 grams/cc0.43 Earth densities
Eccentricity of orbit0.053
Escape Velocity11.5 Km/sec
Molecular weight retained 0.1 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt31°
Planetary albedo 0.43
Exospheric Temperature 18.76° K-1254.24° C Earth temperature
Length of year4825.75 Earth days6230.24 Local days
13.21 Earth years
Length of day18.59 hours
Boiling point of water120.1° Celcius
248.1° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage51.6


Planet #9 Statistics
Planet typeJovianJovian
Distance from primary star1.2E+09 KM8.161 AU
Mass1.2E+27Kg206.339 Earth masses
20.581 Earth masses dust
185.758 Earth masses gas
Equatorial radius62179.1 Km9.7 Earth radii
Density1.22 grams/cc0.22 Earth densities
Eccentricity of orbit0.169
Escape Velocity51.4 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt26°
Planetary albedo 0.51
Exospheric Temperature 7.26° K-1265.74° C Earth temperature
Length of year9828.48 Earth days26625.29 Local days
26.91 Earth years
Length of day8.86 hours


Planet #10 Statistics
Planet typeJovianJovian
Distance from primary star2.6E+09 KM17.186 AU
Mass1.8E+26Kg30.939 Earth masses
5.326 Earth masses dust
25.613 Earth masses gas
Equatorial radius38040.3 Km6 Earth radii
Density0.80 grams/cc0.15 Earth densities
Eccentricity of orbit0.116
Escape Velocity25.5 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt38°
Planetary albedo 0.47
Exospheric Temperature 1.64° K-1271.36° C Earth temperature
Length of year30047.90 Earth days51521.21 Local days
82.27 Earth years
Length of day14.00 hours


Planet #11 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star4.1E+09 KM27.078 AU
Mass1.1E+23Kg0.019 Earth masses
Surface gravity141.8 cm/sec20.14 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-233.5° Celcius
-388.4° Fahrenheit		-247.5° C Earth temperature
-445.6° F Earth temperature
Normal temperature range
NightDay
-240.0° C
-400.0° F		 - -226.9° C
-376.4° F
MinMax
-254.5° C
-426.1° F		 - -211.8° C
-349.2° F
Equatorial radius2285.8 Km0.36 Earth radii
Density2.22 grams/cc0.4 Earth densities
Eccentricity of orbit0.012
Escape Velocity 2.5 Km/sec
Molecular weight retained 0.1 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt33°
Planetary albedo 0.15
Exospheric Temperature 0.66° K-1272.34° C Earth temperature
Length of year59428.97 Earth days35443.91 Local days
162.70 Earth years
Length of day40.24 hours
Boiling point of water-89.8° Celcius
-129.6° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.0


Planet #12 Statistics
Planet typeSub-JovianSub-Jovian
Distance from primary star4.3E+09 KM28.991 AU
Mass1.3E+25Kg2.213 Earth masses
1.036 Earth masses dust
1.177 Earth masses gas
Equatorial radius18409.4 Km2.9 Earth radii
Density0.51 grams/cc0.092 Earth densities
Eccentricity of orbit0.009
Escape Velocity 9.8 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt35°
Planetary albedo 0.48
Exospheric Temperature 0.58° K-1272.42° C Earth temperature
Length of year65835.12 Earth days62379.90 Local days
180.24 Earth years
Length of day25.33 hours


Planet #13 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star5.4E+09 KM35.814 AU
Mass9.1E+23Kg0.152 Earth masses
Surface gravity288.0 cm/sec20.29 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-238.6° Celcius
-397.5° Fahrenheit		-252.6° C Earth temperature
-454.7° F Earth temperature
Normal temperature range
NightDay
-242.7° C
-404.9° F		 - -234.3° C
-389.8° F
MinMax
-254.7° C
-426.5° F		 - -222.4° C
-368.3° F
Equatorial radius4589.0 Km0.72 Earth radii
Density2.25 grams/cc0.41 Earth densities
Eccentricity of orbit0.030
Escape Velocity 5.1 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt56°
Planetary albedo 0.15
Exospheric Temperature 0.38° K-1272.62° C Earth temperature
Length of year90394.91 Earth days76819.00 Local days
247.48 Earth years
Length of day28.24 hours
Boiling point of water-56.7° Celcius
-70.1° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.1


Planet #14 Statistics
Planet typeAsteroidsAsteroids
Low-G, Cold, Airless
Distance from primary star8.1E+09 KM53.892 AU
Mass1.1E+20Kg0.000 Earth masses
Surface gravity14.0 cm/sec20.01 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-245.1° Celcius
-409.1° Fahrenheit		-259.1° C Earth temperature
-466.3° F Earth temperature
Normal temperature range
NightDay
-255.2° C
-427.3° F		 - -234.1° C
-389.4° F
MinMax
-264.3° C
-443.8° F		 - -221.4° C
-366.5° F
Equatorial radius226.5 Km0.036 Earth radii
Density2.21 grams/cc0.4 Earth densities
Eccentricity of orbit0.053
Escape Velocity 0.3 Km/sec
Molecular weight retained 1.6 and aboveH2, He, N, O, CH4, NH3, H2O, Ne...
Axial tilt53°
Planetary albedo 0.15
Exospheric Temperature 0.17° K-1272.83° C Earth temperature
Length of year166861.59 Earth days31268.93 Local days
456.83 Earth years
Length of day128.07 hours
Boiling point of water-151.2° Celcius
-240.2° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.0


Planet #15 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star9E+09 KM60.210 AU
Mass3.1E+23Kg0.052 Earth masses
Surface gravity200.0 cm/sec20.20 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-246.6° Celcius
-411.8° Fahrenheit		-260.6° C Earth temperature
-469.0° F Earth temperature
Normal temperature range
NightDay
-250.2° C
-418.3° F		 - -242.7° C
-404.9° F
MinMax
-261.2° C
-438.2° F		 - -230.6° C
-383.1° F
Equatorial radius3211.6 Km0.5 Earth radii
Density2.23 grams/cc0.4 Earth densities
Eccentricity of orbit0.037
Escape Velocity 3.6 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt53°
Planetary albedo 0.15
Exospheric Temperature 0.13° K-1272.87° C Earth temperature
Length of year197047.26 Earth days139551.94 Local days
539.48 Earth years
Length of day33.89 hours
Boiling point of water-75.0° Celcius
-103.0° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.1


Planet #16 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star1.1E+10 KM71.703 AU
Mass3.3E+22Kg0.006 Earth masses
Surface gravity94.5 cm/sec20.10 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-248.8° Celcius
-415.9° Fahrenheit		-262.8° C Earth temperature
-473.1° F Earth temperature
Normal temperature range
NightDay
-253.3° C
-423.9° F		 - -244.0° C
-407.2° F
MinMax
-264.4° C
-443.9° F		 - -230.2° C
-382.4° F
Equatorial radius1526.3 Km0.24 Earth radii
Density2.22 grams/cc0.4 Earth densities
Eccentricity of orbit0.027
Escape Velocity 1.7 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt39°
Planetary albedo 0.15
Exospheric Temperature 0.09° K-1272.91° C Earth temperature
Length of year256080.94 Earth days124672.87 Local days
701.10 Earth years
Length of day49.30 hours
Boiling point of water-104.6° Celcius
-156.3° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.0


Planet #17 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star1.5E+10 KM101.049 AU
Mass2.7E+22Kg0.005 Earth masses
Surface gravity88.3 cm/sec20.09 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-252.6° Celcius
-422.8° Fahrenheit		-266.6° C Earth temperature
-480.0° F Earth temperature
Normal temperature range
MinMax
-264.4° C
-444.0° F		 - -239.0° C
-398.2° F
Equatorial radius1426.9 Km0.22 Earth radii
Density2.22 grams/cc0.4 Earth densities
Eccentricity of orbit0.224
Escape Velocity 1.6 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt73°
Planetary albedo 0.15
Exospheric Temperature 0.05° K-1272.95° C Earth temperature
Length of year428416.92 Earth days201646.08 Local days
1172.92 Earth years
Length of day50.99 hours
Boiling point of water-106.9° Celcius
-160.3° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.0


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