61 Ursae Majoris
13 Planets (size proportional to Sqrt(Radius))
Sun Rock Rock Rock Terrestrial Martian Ice Jovian GasDwarf Martian Jovian Jovian Sub-Jovian Ice See
Key
Stellar charactersistics
Stellar mass 0.81 solar masses
Stellar luminosity 0.59
Age 4.077 billion years
(9.699 billion left on main sequence)
Habitable ecosphere radius 0.767 AU

Planetary Overview
#TypeDist.MassRadius
1 Rock Rock 0.310 AU 0.095 EM 0.460 ER
2 Rock Rock 0.373 AU 0.025 EM 0.295 ER
3 Rock Rock 0.569 AU 0.030 EM 0.313 ER
4 Terrestrial Terrestrial 0.871 AU 1.638 EM 1.174 ER
5 Martian Martian 1.634 AU 0.363 EM 0.717 ER
6 Ice Ice 1.880 AU 1.472 EM 1.134 ER
7 Jovian Jovian 3.041 AU 98.652 EM 7.110 ER
8 GasDwarf GasDwarf 3.966 AU 2.745 EM 2.557 ER
9 Martian Martian 4.856 AU 0.224 EM 0.818 ER
10 Jovian Jovian 7.672 AU 29.506 EM 5.401 ER
11 Jovian Jovian 13.780 AU 335.213 EM 11.521 ER
12 Sub-Jovian Sub-Jovian 19.842 AU 1.641 EM 2.517 ER
13 Ice Ice 40.290 AU 0.804 EM 1.241 ER

Planet #1 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Hot, Airless, 1-Face
Distance from primary star4.6E+07 KM0.310 AU
Mass5.7E+23Kg0.095 Earth masses
Surface gravity438.5 cm/sec20.45 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature148.8° Celcius
299.9° Fahrenheit		+134.8° C Earth temperature
+242.7° F Earth temperature
Normal temperature range
MinMax
-207.1° C
-340.9° F		 - 345.7° C
654.3° F
Equatorial radius2933.8 Km0.46 Earth radii
Density5.35 grams/cc0.97 Earth densities
Eccentricity of orbit0.035
Escape Velocity 5.1 Km/sec
Molecular weight retained186.8 and above
Axial tilt18°
Planetary albedo 0.07
Exospheric Temperature7776.07° K+6503.07° C Earth temperature
Length of year70.14 Earth days1.00 Local days
Length of day1683.26 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 star5.6E+07 KM0.373 AU
Mass1.5E+23Kg0.025 Earth masses
Surface gravity280.0 cm/sec20.29 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature111.8° Celcius
233.2° Fahrenheit		+97.8° C Earth temperature
+176.0° F Earth temperature
Normal temperature range
MinMax
-216.9° C
-358.4° F		 - 299.9° C
571.8° F
Equatorial radius1881.2 Km0.29 Earth radii
Density5.33 grams/cc0.96 Earth densities
Eccentricity of orbit0.002
Escape Velocity 3.2 Km/sec
Molecular weight retained315.9 and above
Axial tilt24°
Planetary albedo 0.07
Exospheric Temperature5385.65° K+4112.65° C Earth temperature
Length of year92.38 Earth days1.00 Local days
Length of day2217.13 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 star8.5E+07 KM0.569 AU
Mass1.8E+23Kg0.030 Earth masses
Surface gravity296.8 cm/sec20.30 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature 38.5° Celcius
101.3° Fahrenheit		+24.5° C Earth temperature
+44.1° F Earth temperature
Normal temperature range
MinMax
-231.9° C
-385.4° F		 - 207.6° C
405.7° F
Equatorial radius1993.8 Km0.31 Earth radii
Density5.33 grams/cc0.97 Earth densities
Eccentricity of orbit0.006
Escape Velocity 3.4 Km/sec
Molecular weight retained120.8 and aboveXe
Axial tilt28°
Planetary albedo 0.07
Exospheric Temperature2313.68° K+1040.68° C Earth temperature
Length of year174.09 Earth days1.00 Local days
Length of day4178.24 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 typeTerrestrialTerrestrial
Wet, Thick atmosphere (He - unbreathable)
Distance from primary star1.3E+08 KM0.871 AU
Mass9.8E+24Kg1.638 Earth masses
Surface gravity1165.8 cm/sec21.19 Earth gees
Surface pressure 3354 millibars3.310 Earth atmospheres
Surface temperature 12.1° Celcius
53.8° Fahrenheit		-1.9° C Earth temperature
-3.4° F Earth temperature
Normal temperature range
NightDay
9.6° C
49.3° F		 - 14.4° C
57.9° F
MinMax
-7.6° C
18.3° F		 - 30.8° C
87.4° F
Equatorial radius7484.6 Km1.2 Earth radii
Density5.57 grams/cc1 Earth densities
Eccentricity of orbit0.266
Escape Velocity13.2 Km/sec
Molecular weight retained 3.6 and aboveHe, N, O, CH4, NH3, H2O, Ne, N2...
Helium 99.2%  3325 mb (ipp: 3263) 
Nitrogen  0.8%  27 mb (ipp: 26) 
Axial tilt20°
Planetary albedo 0.34
Exospheric Temperature986.86° K-286.14° C Earth temperature
Length of year329.85 Earth days537.85 Local days
Length of day14.72 hours
Boiling point of water136.5° Celcius
277.6° Fahrenheit
Hydrosphere percentage90.1
Cloud cover percentage59.1
Ice cover percentage 3.5


Planet #5 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Thin atmosphere
Distance from primary star2.4E+08 KM1.634 AU
Mass2.2E+24Kg0.363 Earth masses
Surface gravity691.1 cm/sec20.70 Earth gees
Surface pressure 165 millibars0.162 Earth atmospheres
Surface temperature-120.0° Celcius
-184.0° Fahrenheit		-134.0° C Earth temperature
-241.2° F Earth temperature
Normal temperature range
NightDay
-126.3° C
-195.4° F		 - -113.9° C
-173.0° F
MinMax
-149.0° C
-236.2° F		 - -92.9° C
-135.2° F
Equatorial radius4575.3 Km0.72 Earth radii
Density5.40 grams/cc0.98 Earth densities
Eccentricity of orbit0.038
Escape Velocity 8.0 Km/sec
Molecular weight retained 2.8 and aboveHe, N, O, CH4, NH3, H2O, Ne, N2...
Axial tilt26°
Planetary albedo 0.66
Exospheric Temperature280.34° K-992.66° C Earth temperature
Length of year847.70 Earth days1111.86 Local days
2.32 Earth years
Length of day18.30 hours
Boiling point of water56.0° Celcius
132.8° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage92.7


Planet #6 Statistics
Planet typeIceIce
Cold, Icy, Arid, Cloudless, Thick atmosphere
Distance from primary star2.8E+08 KM1.880 AU
Mass8.8E+24Kg1.472 Earth masses
Surface gravity1122.5 cm/sec21.14 Earth gees
Surface pressure 2708 millibars2.672 Earth atmospheres
Surface temperature-115.7° Celcius
-176.3° Fahrenheit		-129.7° C Earth temperature
-233.5° F Earth temperature
Normal temperature range
NightDay
-117.2° C
-179.0° F		 - -114.4° C
-173.9° F
MinMax
-130.1° C
-202.1° F		 - -102.5° C
-152.4° F
Equatorial radius7230.3 Km1.1 Earth radii
Density5.56 grams/cc1 Earth densities
Eccentricity of orbit0.013
Escape Velocity12.7 Km/sec
Molecular weight retained 0.9 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt28°
Planetary albedo 0.70
Exospheric Temperature211.80° K-1061.20° C Earth temperature
Length of year1046.07 Earth days1754.19 Local days
2.86 Earth years
Length of day14.31 hours
Boiling point of water129.5° Celcius
265.0° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.1
Ice cover percentage100.0


Planet #7 Statistics
Planet typeJovianJovian
Distance from primary star4.5E+08 KM3.041 AU
Mass5.9E+26Kg98.652 Earth masses
16.502 Earth masses dust
82.150 Earth masses gas
Equatorial radius45346.6 Km7.1 Earth radii
Density1.51 grams/cc0.27 Earth densities
Eccentricity of orbit0.066
Escape Velocity41.7 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt37°
Planetary albedo 0.51
Exospheric Temperature 80.95° K-1192.05° C Earth temperature
Length of year2151.72 Earth days5526.57 Local days
5.89 Earth years
Length of day9.34 hours


Planet #8 Statistics
Planet typeGasDwarfGasDwarf
Distance from primary star5.9E+08 KM3.966 AU
Mass1.6E+25Kg
2.745 Earth masses
2.240 Earth masses dust
0.505 Earth masses gas
Equatorial radius16309.3 Km2.6 Earth radii
Density0.90 grams/cc0.16 Earth densities
Eccentricity of orbit0.056
Escape Velocity11.6 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt22°
Planetary albedo 0.53
Exospheric Temperature 47.58° K-1225.42° C Earth temperature
Length of year3205.88 Earth days3818.66 Local days
8.78 Earth years
Length of day20.15 hours


Planet #9 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Unbreathably thin atmosphere
Distance from primary star7.3E+08 KM4.856 AU
Mass1.3E+24Kg0.224 Earth masses
Surface gravity328.8 cm/sec20.34 Earth gees
Surface pressure 34 millibars0.033 Earth atmospheres
Surface temperature-169.3° Celcius
-272.8° Fahrenheit		-183.3° C Earth temperature
-330.0° F Earth temperature
+1.6° C greenhouse effect
Normal temperature range
NightDay
-178.8° C
-289.9° F		 - -160.1° C
-256.1° F
MinMax
-199.3° C
-326.7° F		 - -140.9° C
-221.7° F
Equatorial radius5216.7 Km0.82 Earth radii
Density2.26 grams/cc0.41 Earth densities
Eccentricity of orbit0.050
Escape Velocity 5.9 Km/sec
Molecular weight retained 0.6 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt34°
Planetary albedo 0.28
Exospheric Temperature 31.75° K-1241.25° C Earth temperature
Length of year4342.49 Earth days3943.27 Local days
11.89 Earth years
Length of day26.43 hours
Boiling point of water25.2° Celcius
77.3° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage23.6


Planet #10 Statistics
Planet typeJovianJovian
Distance from primary star1.1E+09 KM7.672 AU
Mass1.8E+26Kg29.506 Earth masses
6.081 Earth masses dust
23.425 Earth masses gas
Equatorial radius34446.4 Km5.4 Earth radii
Density1.03 grams/cc0.19 Earth densities
Eccentricity of orbit0.008
Escape Velocity26.1 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt47°
Planetary albedo 0.48
Exospheric Temperature 12.72° K-1260.28° C Earth temperature
Length of year8622.98 Earth days15945.16 Local days
23.61 Earth years
Length of day12.98 hours


Planet #11 Statistics
Planet typeJovianJovian
Distance from primary star2.1E+09 KM13.780 AU
Mass2E+27Kg335.213 Earth masses
22.145 Earth masses dust
313.068 Earth masses gas
Equatorial radius73480.1 Km12 Earth radii
Density1.21 grams/cc0.22 Earth densities
Eccentricity of orbit0.105
Escape Velocity60.3 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt36°
Planetary albedo 0.51
Exospheric Temperature 3.94° K-1269.06° C Earth temperature
Length of year20747.36 Earth days60619.80 Local days
56.80 Earth years
Length of day8.21 hours


Planet #12 Statistics
Planet typeSub-JovianSub-Jovian
Distance from primary star3E+09 KM19.842 AU
Mass9.8E+24Kg1.641 Earth masses
0.965 Earth masses dust
0.676 Earth masses gas
Equatorial radius16052.3 Km2.5 Earth radii
Density0.57 grams/cc0.1 Earth densities
Eccentricity of orbit0.078
Escape Velocity 9.0 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt28°
Planetary albedo 0.46
Exospheric Temperature 1.90° K-1271.10° C Earth temperature
Length of year35869.90 Earth days33564.63 Local days
98.20 Earth years
Length of day25.65 hours


Planet #13 Statistics
Planet typeIceIce
Low-G, Cold, Icy, Arid, Cloudless, Thin atmosphere
Distance from primary star6E+09 KM40.290 AU
Mass4.8E+24Kg
0.804 Earth masses
0.645 Earth masses dust
0.159 Earth masses gas
Surface gravity511.8 cm/sec20.52 Earth gees
Surface pressure 202 millibars0.199 Earth atmospheres
Surface temperature-235.3° Celcius
-391.5° Fahrenheit		-249.3° C Earth temperature
-448.7° F Earth temperature
+2.2° C greenhouse effect
Normal temperature range
NightDay
-236.9° C
-394.4° F		 - -233.7° C
-388.6° F
MinMax
-248.0° C
-414.4° F		 - -223.5° C
-370.3° F
Equatorial radius7913.7 Km1.2 Earth radii
Density2.31 grams/cc0.42 Earth densities
Eccentricity of orbit0.101
Escape Velocity 9.0 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt66°
Planetary albedo 0.24
Exospheric Temperature 0.46° K-1272.54° C Earth temperature
Length of year103787.19 Earth days117583.08 Local days
284.15 Earth years
Length of day21.18 hours
Boiling point of water60.4° Celcius
140.8° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage100.0


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