Eta Cassiopeiae A
8 Planets (size proportional to Sqrt(Radius))
Sun Rock Rock Rock Water Jovian Sub-Jovian Jovian Martian See
Key
Stellar charactersistics
Stellar mass 0.91 solar masses
Stellar luminosity 1.15
Age 3.205 billion years
(4.743 billion left on main sequence)
Habitable ecosphere radius 1.070 AU

Planetary Overview
#TypeDist.MassRadius
1 Rock Rock 0.292 AU 0.055 EM 0.385 ER
2 Rock Rock 0.425 AU 0.016 EM 0.257 ER
3 Rock Rock 0.559 AU 0.522 EM 0.808 ER
4 Water Water 1.171 AU 2.107 EM 1.273 ER
5 Jovian Jovian 2.065 AU 22.266 EM 4.338 ER
6 Sub-Jovian Sub-Jovian 4.407 AU 12.457 EM 3.900 ER
7 Jovian Jovian 7.229 AU 760.282 EM 13.484 ER
8 Martian Martian 9.394 AU 0.631 EM 1.147 ER

Planet #1 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Hot, Airless, 1-Face
Distance from primary star4.4E+07 KM0.292 AU
Mass3.3E+23Kg0.055 Earth masses
Surface gravity366.3 cm/sec20.37 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature240.4° Celcius
464.7° Fahrenheit		+226.4° C Earth temperature
+407.5° F Earth temperature
Normal temperature range
NightDay
-177.8° C
-288.1° F		 - 454.8° C
850.7° F
MinMax
-189.1° C
-308.4° F		 - 458.1° C
856.6° F
Equatorial radius2456.3 Km0.39 Earth radii
Density5.34 grams/cc0.97 Earth densities
Eccentricity of orbit0.040
Escape Velocity 4.2 Km/sec
Molecular weight retained581.8 and above
Axial tilt13°
Planetary albedo 0.07
Exospheric Temperature17058.68° K+15785.68° C Earth temperature
Length of year60.51 Earth days1.00 Local days
Length of day1452.29 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 star6.4E+07 KM0.425 AU
Mass9.8E+22Kg0.016 Earth masses
Surface gravity244.0 cm/sec20.25 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature152.5° Celcius
306.5° Fahrenheit		+138.5° C Earth temperature
+249.3° F Earth temperature
Normal temperature range
MinMax
-213.3° C
-352.0° F		 - 351.1° C
663.9° F
Equatorial radius1640.8 Km0.26 Earth radii
Density5.32 grams/cc0.96 Earth densities
Eccentricity of orbit0.022
Escape Velocity 2.8 Km/sec
Molecular weight retained617.2 and above
Axial tilt21°
Planetary albedo 0.07
Exospheric Temperature8053.16° K+6780.16° C Earth temperature
Length of year106.25 Earth days1.00 Local days
Length of day2549.99 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 star8.4E+07 KM0.559 AU
Mass3.1E+24Kg0.522 Earth masses
Surface gravity782.7 cm/sec20.80 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature 98.2° Celcius
208.7° Fahrenheit		+84.2° C Earth temperature
+151.5° F Earth temperature
Normal temperature range
MinMax
-225.0° C
-373.0° F		 - 283.6° C
542.4° F
Equatorial radius5156.3 Km0.81 Earth radii
Density5.43 grams/cc0.98 Earth densities
Eccentricity of orbit0.034
Escape Velocity 9.0 Km/sec
Molecular weight retained35.5 and aboveAr, CO2, N2O, NO2, O3, SO2, SO3, Kr...
Axial tilt22°
Planetary albedo 0.07
Exospheric Temperature4662.30° K+3389.30° C Earth temperature
Length of year160.09 Earth days1.00 Local days
Length of day3842.05 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
High-G, Thick atmosphere (He - unbreathable)
Distance from primary star1.8E+08 KM1.171 AU
Mass1.3E+25Kg2.107 Earth masses
Surface gravity1275.5 cm/sec21.30 Earth gees
Surface pressure 4942 millibars4.877 Earth atmospheres
Surface temperature 15.8° Celcius
60.5° Fahrenheit		+1.8° C Earth temperature
+3.3° F Earth temperature
+41.0° C greenhouse effect
Normal temperature range
NightDay
13.9° C
57.1° F		 - 17.6° C
63.7° F
MinMax
1.3° C
34.4° F		 - 29.6° C
85.3° F
Equatorial radius8116.6 Km1.3 Earth radii
Density5.62 grams/cc1 Earth densities
Eccentricity of orbit0.054
Escape Velocity14.4 Km/sec
Molecular weight retained 3.2 and aboveHe, N, O, CH4, NH3, H2O, Ne, N2...
Helium 99.6%  4920 mb (ipp: 4857) 
Nitrogen  0.4%  21 mb (ipp: 21) 
Axial tilt14°
Planetary albedo 0.43
Exospheric Temperature1063.49° K-209.51° C Earth temperature
Length of year485.01 Earth days861.91 Local days
1.33 Earth years
Length of day13.51 hours
Boiling point of water149.7° Celcius
301.5° Fahrenheit
Hydrosphere percentage100.0
Cloud cover percentage77.6
Ice cover percentage 2.1


Planet #5 Statistics
Planet typeJovianJovian
Distance from primary star3.1E+08 KM2.065 AU
Mass1.3E+26Kg22.266 Earth masses
7.506 Earth masses dust
14.760 Earth masses gas
Equatorial radius27664.8 Km4.3 Earth radii
Density1.50 grams/cc0.27 Earth densities
Eccentricity of orbit0.072
Escape Velocity25.3 Km/sec
Molecular weight retained 0.4 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt28°
Planetary albedo 0.48
Exospheric Temperature341.83° K-931.17° C Earth temperature
Length of year1136.13 Earth days2272.37 Local days
3.11 Earth years
Length of day12.00 hours


Planet #6 Statistics
Planet typeSub-JovianSub-Jovian
Distance from primary star6.6E+08 KM4.407 AU
Mass7.4E+25Kg12.457 Earth masses
4.406 Earth masses dust
8.051 Earth masses gas
Equatorial radius24877.3 Km3.9 Earth radii
Density1.15 grams/cc0.21 Earth densities
Eccentricity of orbit0.177
Escape Velocity20.0 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt40°
Planetary albedo 0.51
Exospheric Temperature 75.03° K-1197.97° C Earth temperature
Length of year3542.83 Earth days5894.17 Local days
9.70 Earth years
Length of day14.43 hours


Planet #7 Statistics
Planet typeJovianJovian
Distance from primary star1.1E+09 KM7.229 AU
Mass4.5E+27Kg760.282 Earth masses
42.491 Earth masses dust
717.791 Earth masses gas
Equatorial radius85999.5 Km13 Earth radii
Density1.71 grams/cc0.31 Earth densities
Eccentricity of orbit0.047
Escape Velocity84.0 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt43°
Planetary albedo 0.50
Exospheric Temperature 27.89° K-1245.11° C Earth temperature
Length of year7433.06 Earth days27946.03 Local days
20.35 Earth years
Length of day6.38 hours


Planet #8 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Thin atmosphere
Distance from primary star1.4E+09 KM9.394 AU
Mass3.8E+24Kg0.631 Earth masses
Surface gravity470.1 cm/sec20.48 Earth gees
Surface pressure 238 millibars0.234 Earth atmospheres
Surface temperature-182.3° Celcius
-296.2° Fahrenheit		-196.3° C Earth temperature
-353.4° F Earth temperature
Normal temperature range
NightDay
-186.2° C
-303.2° F		 - -178.7° C
-289.6° F
MinMax
-205.0° C
-337.0° F		 - -161.7° C
-259.0° F
Equatorial radius7317.5 Km1.1 Earth radii
Density2.30 grams/cc0.42 Earth densities
Eccentricity of orbit0.085
Escape Velocity 8.3 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt39°
Planetary albedo 0.32
Exospheric Temperature 16.52° K-1256.48° C Earth temperature
Length of year11024.05 Earth days11969.86 Local days
30.18 Earth years
Length of day22.10 hours
Boiling point of water64.1° Celcius
147.3° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage30.1


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