Sigma Draconis
13 Planets (size proportional to Sqrt(Radius))
Sun Rock Rock Rock Martian Martian Martian Sub-Jovian Martian Jovian Jovian Rock Sub-Jovian Rock See
Key
Stellar charactersistics
Stellar mass 0.82 solar masses
Stellar luminosity 0.39
Age 1.583 billion years
(19.442 billion left on main sequence)
Habitable ecosphere radius 0.624 AU

Planetary Overview
#TypeDist.MassRadius
1 Rock Rock 0.333 AU 0.109 EM 0.482 ER
2 Rock Rock 0.573 AU 0.121 EM 0.499 ER
3 Rock Rock 0.681 AU 0.006 EM 0.181 ER
4 Martian Martian 0.759 AU 0.878 EM 0.958 ER
5 Martian Martian 1.176 AU 0.190 EM 0.580 ER
6 Martian Martian 1.454 AU 0.103 EM 0.473 ER
7 Sub-Jovian Sub-Jovian 1.981 AU 18.736 EM 4.299 ER
8 Martian Martian 3.484 AU 1.964 EM 1.651 ER
9 Jovian Jovian 7.081 AU 80.791 EM 7.321 ER
10 Jovian Jovian 14.541 AU 180.311 EM 9.825 ER
11 Rock Rock 17.857 AU 0.256 EM 0.854 ER
12 Sub-Jovian Sub-Jovian 37.083 AU 2.424 EM 3.022 ER
13 Rock Rock 46.294 AU 0.058 EM 0.524 ER

Planet #1 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Hot, Airless, 1-Face
Distance from primary star5E+07 KM0.333 AU
Mass6.5E+23Kg0.109 Earth masses
Surface gravity459.6 cm/sec20.47 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature 94.4° Celcius
202.0° Fahrenheit		+80.4° C Earth temperature
+144.8° F Earth temperature
Normal temperature range
MinMax
-217.5° C
-359.6° F		 - 277.9° C
532.3° F
Equatorial radius3072.4 Km0.48 Earth radii
Density5.35 grams/cc0.97 Earth densities
Eccentricity of orbit0.080
Escape Velocity 5.3 Km/sec
Molecular weight retained95.4 and aboveXe
Axial tilt24°
Planetary albedo 0.07
Exospheric Temperature4477.73° K+3204.73° C Earth temperature
Length of year77.50 Earth days1.00 Local days
Length of day1860.06 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, Cold, Airless, 1-Face
Distance from primary star8.6E+07 KM0.573 AU
Mass7.2E+23Kg0.121 Earth masses
Surface gravity476.0 cm/sec20.49 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature 7.1° Celcius
44.7° Fahrenheit		-6.9° C Earth temperature
-12.5° F Earth temperature
Normal temperature range
MinMax
-235.3° C
-391.6° F		 - 167.4° C
333.3° F
Equatorial radius3180.3 Km0.5 Earth radii
Density5.36 grams/cc0.97 Earth densities
Eccentricity of orbit0.088
Escape Velocity 5.5 Km/sec
Molecular weight retained30.1 and aboveO2, H2S, Ar, CO2, N2O, NO2, O3, SO2...
Axial tilt13°
Planetary albedo 0.07
Exospheric Temperature1512.53° K+239.53° C Earth temperature
Length of year174.92 Earth days1.00 Local days
Length of day4198.01 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, Cold, Airless, 1-Face
Distance from primary star1E+08 KM0.681 AU
Mass3.4E+22Kg0.006 Earth masses
Surface gravity171.2 cm/sec20.17 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-16.0° Celcius
3.1° Fahrenheit		-30.0° C Earth temperature
-54.1° F Earth temperature
Normal temperature range
MinMax
-238.2° C
-396.7° F		 - 137.1° C
278.7° F
Equatorial radius1152.3 Km0.18 Earth radii
Density5.32 grams/cc0.96 Earth densities
Eccentricity of orbit0.004
Escape Velocity 2.0 Km/sec
Molecular weight retained163.5 and above
Axial tilt13°
Planetary albedo 0.07
Exospheric Temperature1072.03° K-200.97° C Earth temperature
Length of year226.44 Earth days1.00 Local days
Length of day5434.60 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 typeMartianMartian
Cold, Icy, Arid, Cloudless, Normal atmosphere (N2, O2 - breathable)
Distance from primary star1.1E+08 KM0.759 AU
Mass5.2E+24Kg0.878 Earth masses
Surface gravity936.7 cm/sec20.96 Earth gees
Surface pressure 952 millibars0.939 Earth atmospheres
Surface temperature-13.8° Celcius
7.2° Fahrenheit		-27.8° C Earth temperature
-50.0° F Earth temperature
Normal temperature range
NightDay
-18.4° C
-1.2° F		 - -9.4° C
15.0° F
MinMax
-40.8° C
-41.4° F		 - 11.6° C
53.0° F
Equatorial radius6113.2 Km0.96 Earth radii
Density5.48 grams/cc0.99 Earth densities
Eccentricity of orbit0.061
Escape Velocity10.7 Km/sec
Molecular weight retained 4.5 and aboveN, O, CH4, NH3, H2O, Ne, N2, CO...
Nitrogen 75.6%  720 mb (ipp: 672) 
Oxygen 24.1%  229 mb (ipp: 214) 
Argon  0.2%  2 mb (ipp: 2) 
Axial tilt15°
Planetary albedo 0.30
Exospheric Temperature861.79° K-411.21° C Earth temperature
Length of year266.72 Earth days379.99 Local days
Length of day16.85 hours
Boiling point of water98.5° Celcius
209.3° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 8.4
Ice cover percentage25.8


Planet #5 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Unbreathably thin atmosphere
Distance from primary star1.8E+08 KM1.176 AU
Mass1.1E+24Kg0.190 Earth masses
Surface gravity554.8 cm/sec20.57 Earth gees
Surface pressure 45 millibars0.044 Earth atmospheres
Surface temperature-103.5° Celcius
-154.3° Fahrenheit		-117.5° C Earth temperature
-211.5° F Earth temperature
Normal temperature range
NightDay
-115.3° C
-175.5° F		 - -92.1° C
-133.8° F
MinMax
-139.9° C
-219.8° F		 - -68.8° C
-91.8° F
Equatorial radius3696.1 Km0.58 Earth radii
Density5.37 grams/cc0.97 Earth densities
Eccentricity of orbit0.023
Escape Velocity 6.4 Km/sec
Molecular weight retained 5.3 and aboveN, O, CH4, NH3, H2O, Ne, N2, CO...
Axial tilt17°
Planetary albedo 0.55
Exospheric Temperature359.11° K-913.89° C Earth temperature
Length of year514.26 Earth days595.61 Local days
1.41 Earth years
Length of day20.72 hours
Boiling point of water30.2° Celcius
86.3° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage73.5


Planet #6 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Unbreathably thin atmosphere
Distance from primary star2.2E+08 KM1.454 AU
Mass6.2E+23Kg0.103 Earth masses
Surface gravity451.1 cm/sec20.46 Earth gees
Surface pressure 13 millibars0.013 Earth atmospheres
Surface temperature-117.0° Celcius
-178.6° Fahrenheit		-131.0° C Earth temperature
-235.8° F Earth temperature
Normal temperature range
NightDay
-131.3° C
-204.3° F		 - -102.9° C
-153.2° F
MinMax
-154.4° C
-245.9° F		 - -80.8° C
-113.5° F
Equatorial radius3016.9 Km0.47 Earth radii
Density5.35 grams/cc0.97 Earth densities
Eccentricity of orbit0.004
Escape Velocity 5.2 Km/sec
Molecular weight retained 5.2 and aboveN, O, CH4, NH3, H2O, Ne, N2, CO...
Axial tilt24°
Planetary albedo 0.48
Exospheric Temperature234.85° K-1038.15° C Earth temperature
Length of year707.16 Earth days745.81 Local days
1.94 Earth years
Length of day22.76 hours
Boiling point of water9.4° Celcius
48.9° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage59.8


Planet #7 Statistics
Planet typeSub-JovianSub-Jovian
Distance from primary star3E+08 KM1.981 AU
Mass1.1E+26Kg18.736 Earth masses
8.701 Earth masses dust
10.035 Earth masses gas
Equatorial radius27418.5 Km4.3 Earth radii
Density1.30 grams/cc0.23 Earth densities
Eccentricity of orbit0.146
Escape Velocity23.3 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt30°
Planetary albedo 0.51
Exospheric Temperature126.52° K-1146.48° C Earth temperature
Length of year1124.52 Earth days2081.68 Local days
3.08 Earth years
Length of day12.96 hours


Planet #8 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Thick atmosphere
Distance from primary star5.2E+08 KM3.484 AU
Mass1.2E+25Kg1.964 Earth masses
Surface gravity706.2 cm/sec20.72 Earth gees
Surface pressure 2552 millibars2.518 Earth atmospheres
Surface temperature-150.9° Celcius
-239.7° Fahrenheit		-164.9° C Earth temperature
-296.9° F Earth temperature
Normal temperature range
NightDay
-152.4° C
-242.3° F		 - -149.6° C
-237.2° F
MinMax
-164.9° C
-264.8° F		 - -138.1° C
-216.6° F
Equatorial radius10530.6 Km1.7 Earth radii
Density2.40 grams/cc0.43 Earth densities
Eccentricity of orbit0.053
Escape Velocity12.2 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt34°
Planetary albedo 0.43
Exospheric Temperature 40.90° K-1232.10° C Earth temperature
Length of year2622.88 Earth days3490.44 Local days
7.18 Earth years
Length of day18.03 hours
Boiling point of water127.6° Celcius
261.6° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage50.1


Planet #9 Statistics
Planet typeJovianJovian
Distance from primary star1.1E+09 KM7.081 AU
Mass4.8E+26Kg80.791 Earth masses
12.770 Earth masses dust
68.021 Earth masses gas
Equatorial radius46694.5 Km7.3 Earth radii
Density1.13 grams/cc0.21 Earth densities
Eccentricity of orbit0.237
Escape Velocity37.1 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt23°
Planetary albedo 0.51
Exospheric Temperature 9.90° K-1263.10° C Earth temperature
Length of year7599.39 Earth days17153.58 Local days
20.81 Earth years
Length of day10.63 hours


Planet #10 Statistics
Planet typeJovianJovian
Distance from primary star2.2E+09 KM14.541 AU
Mass1.1E+27Kg180.311 Earth masses
15.766 Earth masses dust
164.545 Earth masses gas
Equatorial radius62661.4 Km9.8 Earth radii
Density1.05 grams/cc0.19 Earth densities
Eccentricity of orbit0.060
Escape Velocity47.9 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt44°
Planetary albedo 0.48
Exospheric Temperature 2.35° K-1270.65° C Earth temperature
Length of year22358.90 Earth days56185.31 Local days
61.21 Earth years
Length of day9.55 hours


Planet #11 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star2.7E+09 KM17.857 AU
Mass1.5E+24Kg0.256 Earth masses
Surface gravity344.0 cm/sec20.35 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-223.9° Celcius
-371.0° Fahrenheit		-237.9° C Earth temperature
-428.2° F Earth temperature
Normal temperature range
NightDay
-229.4° C
-381.0° F		 - -218.2° C
-360.8° F
MinMax
-247.4° C
-413.3° F		 - -200.6° C
-329.1° F
Equatorial radius5447.9 Km0.85 Earth radii
Density2.26 grams/cc0.41 Earth densities
Eccentricity of orbit0.093
Escape Velocity 6.1 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt27°
Planetary albedo 0.15
Exospheric Temperature 1.56° K-1271.44° C Earth temperature
Length of year30436.48 Earth days28269.31 Local days
83.33 Earth years
Length of day25.84 hours
Boiling point of water-47.5° Celcius
-53.5° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.1


Planet #12 Statistics
Planet typeSub-JovianSub-Jovian
Distance from primary star5.5E+09 KM37.083 AU
Mass1.4E+25Kg2.424 Earth masses
1.087 Earth masses dust
1.337 Earth masses gas
Equatorial radius19276.9 Km3 Earth radii
Density0.48 grams/cc0.087 Earth densities
Eccentricity of orbit0.185
Escape Velocity10.0 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt47°
Planetary albedo 0.51
Exospheric Temperature 0.36° K-1272.64° C Earth temperature
Length of year91087.44 Earth days86270.06 Local days
249.38 Earth years
Length of day25.34 hours


Planet #13 Statistics
Planet typeRockRock
Low-G, Cold, Airless
Distance from primary star6.9E+09 KM46.294 AU
Mass3.5E+23Kg0.058 Earth masses
Surface gravity208.2 cm/sec20.21 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature-242.6° Celcius
-404.7° Fahrenheit		-256.6° C Earth temperature
-461.9° F Earth temperature
Normal temperature range
NightDay
-246.8° C
-412.2° F		 - -238.3° C
-396.9° F
MinMax
-260.4° C
-436.7° F		 - -223.2° C
-369.7° F
Equatorial radius3340.5 Km0.52 Earth radii
Density2.23 grams/cc0.4 Earth densities
Eccentricity of orbit0.145
Escape Velocity 3.7 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt45°
Planetary albedo 0.15
Exospheric Temperature 0.23° K-1272.77° C Earth temperature
Length of year127049.87 Earth days91794.12 Local days
347.84 Earth years
Length of day33.22 hours
Boiling point of water-73.9° Celcius
-101.0° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage 0.0


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