HR 7703 (HJ 5173) A
8 Planets (size proportional to Sqrt(Radius))
Sun Rock Rock Ice Ice Sub-Jovian Martian Jovian Martian See
Key
Stellar charactersistics
Stellar mass 0.82 solar masses
Stellar luminosity 0.23
Age 5.445 billion years
(30.207 billion left on main sequence)
Habitable ecosphere radius 0.480 AU

Planetary Overview
#TypeDist.MassRadius
1 Rock Rock 0.289 AU 0.065 EM 0.405 ER
2 Rock Rock 0.487 AU 0.030 EM 0.312 ER
3 Ice Ice 0.642 AU 1.006 EM 1.002 ER
4 Ice Ice 0.985 AU 0.728 EM 0.902 ER
5 Sub-Jovian Sub-Jovian 2.072 AU 11.032 EM 3.780 ER
6 Martian Martian 2.516 AU 0.151 EM 0.718 ER
7 Jovian Jovian 5.185 AU 326.879 EM 10.962 ER
8 Martian Martian 6.844 AU 1.549 EM 1.531 ER

Planet #1 Statistics
Planet typeRockRock
Tidally Locked 1 Face
Low-G, Hot, Airless, 1-Face
Distance from primary star4.3E+07 KM0.289 AU
Mass3.9E+23Kg0.065 Earth masses
Surface gravity385.5 cm/sec20.39 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature 72.8° Celcius
163.1° Fahrenheit		+58.8° C Earth temperature
+105.9° F Earth temperature
Normal temperature range
MinMax
-217.1° C
-358.7° F		 - 250.0° C
482.0° F
Equatorial radius2583.7 Km0.41 Earth radii
Density5.34 grams/cc0.97 Earth densities
Eccentricity of orbit0.018
Escape Velocity 4.5 Km/sec
Molecular weight retained109.9 and aboveXe
Axial tilt13°
Planetary albedo 0.07
Exospheric Temperature3513.80° K+2240.80° C Earth temperature
Length of year62.56 Earth days1.00 Local days
Length of day1501.36 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 star7.3E+07 KM0.487 AU
Mass1.8E+23Kg0.030 Earth masses
Surface gravity296.6 cm/sec20.30 Earth gees
Surface pressure 0 millibars0.000 Earth atmospheres
Surface temperature -6.7° Celcius
20.0° Fahrenheit		-20.7° C Earth temperature
-37.2° F Earth temperature
Normal temperature range
MinMax
-236.6° C
-393.9° F		 - 149.1° C
300.5° F
Equatorial radius1992.0 Km0.31 Earth radii
Density5.33 grams/cc0.97 Earth densities
Eccentricity of orbit0.086
Escape Velocity 3.4 Km/sec
Molecular weight retained65.3 and aboveSO3, Kr, Xe
Axial tilt19°
Planetary albedo 0.07
Exospheric Temperature1236.94° K-36.06° C Earth temperature
Length of year136.88 Earth days1.00 Local days
Length of day3285.17 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 typeIceIce
Cold, Icy, Arid, Cloudless, Normal atmosphere
Distance from primary star9.6E+07 KM0.642 AU
Mass6E+24Kg1.006 Earth masses
Surface gravity982.2 cm/sec21.00 Earth gees
Surface pressure 1249 millibars1.233 Earth atmospheres
Surface temperature-69.8° Celcius
-93.7° Fahrenheit		-83.8° C Earth temperature
-150.9° F Earth temperature
Normal temperature range
NightDay
-76.5° C
-105.7° F		 - -63.9° C
-83.1° F
MinMax
-97.0° C
-142.5° F		 - -44.7° C
-48.4° F
Equatorial radius6390.4 Km1 Earth radii
Density5.50 grams/cc1 Earth densities
Eccentricity of orbit0.188
Escape Velocity11.2 Km/sec
Molecular weight retained 3.6 and aboveHe, N, O, CH4, NH3, H2O, Ne, N2...
Axial tilt29°
Planetary albedo 0.70
Exospheric Temperature709.65° K-563.35° C Earth temperature
Length of year207.65 Earth days133.83 Local days
Length of day37.24 hours
Boiling point of water106.1° Celcius
223.0° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.3
Ice cover percentage99.3


Planet #4 Statistics
Planet typeIceIce
Cold, Icy, Arid, Cloudless, Normal atmosphere
Distance from primary star1.5E+08 KM0.985 AU
Mass4.4E+24Kg0.728 Earth masses
Surface gravity877.8 cm/sec20.90 Earth gees
Surface pressure 654 millibars0.646 Earth atmospheres
Surface temperature-114.5° Celcius
-174.1° Fahrenheit		-128.5° C Earth temperature
-231.3° F Earth temperature
Normal temperature range
NightDay
-118.0° C
-180.3° F		 - -111.3° C
-168.3° F
MinMax
-138.6° C
-217.5° F		 - -92.2° C
-133.9° F
Equatorial radius5750.4 Km0.9 Earth radii
Density5.46 grams/cc0.99 Earth densities
Eccentricity of orbit0.071
Escape Velocity10.0 Km/sec
Molecular weight retained 1.9 and aboveH2, He, N, O, CH4, NH3, H2O, Ne...
Axial tilt22°
Planetary albedo 0.70
Exospheric Temperature301.97° K-971.03° C Earth temperature
Length of year394.12 Earth days550.06 Local days
1.08 Earth years
Length of day17.20 hours
Boiling point of water88.5° Celcius
191.3° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.1
Ice cover percentage100.0


Planet #5 Statistics
Planet typeSub-JovianSub-Jovian
Distance from primary star3.1E+08 KM2.072 AU
Mass6.6E+25Kg11.032 Earth masses
7.031 Earth masses dust
4.001 Earth masses gas
Equatorial radius24107.1 Km3.8 Earth radii
Density1.12 grams/cc0.2 Earth densities
Eccentricity of orbit0.110
Escape Velocity19.1 Km/sec
Molecular weight retained 0.2 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt19°
Planetary albedo 0.45
Exospheric Temperature 68.18° K-1204.82° C Earth temperature
Length of year1203.28 Earth days1943.99 Local days
3.29 Earth years
Length of day14.86 hours


Planet #6 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Unbreathably thin atmosphere
Distance from primary star3.8E+08 KM2.516 AU
Mass9E+23Kg0.151 Earth masses
Surface gravity287.4 cm/sec20.29 Earth gees
Surface pressure 15 millibars0.015 Earth atmospheres
Surface temperature-159.5° Celcius
-255.2° Fahrenheit		-173.5° C Earth temperature
-312.4° F Earth temperature
Normal temperature range
NightDay
-172.0° C
-277.5° F		 - -147.3° C
-233.1° F
MinMax
-195.0° C
-319.0° F		 - -125.4° C
-193.8° F
Equatorial radius4579.9 Km0.72 Earth radii
Density2.25 grams/cc0.41 Earth densities
Eccentricity of orbit0.136
Escape Velocity 5.1 Km/sec
Molecular weight retained 1.1 and aboveH2, He, N, O, CH4, NH3, H2O, Ne...
Axial tilt33°
Planetary albedo 0.26
Exospheric Temperature 46.24° K-1226.76° C Earth temperature
Length of year1610.10 Earth days1366.09 Local days
4.41 Earth years
Length of day28.29 hours
Boiling point of water11.7° Celcius
53.0° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage20.4


Planet #7 Statistics
Planet typeJovianJovian
Distance from primary star7.8E+08 KM5.185 AU
Mass2E+27Kg326.879 Earth masses
32.730 Earth masses dust
294.149 Earth masses gas
Equatorial radius69918.6 Km11 Earth radii
Density1.36 grams/cc0.25 Earth densities
Eccentricity of orbit0.101
Escape Velocity61.1 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt22°
Planetary albedo 0.49
Exospheric Temperature 10.89° K-1262.11° C Earth temperature
Length of year4759.77 Earth days14432.70 Local days
13.03 Earth years
Length of day7.91 hours


Planet #8 Statistics
Planet typeMartianMartian
Low-G, Cold, Icy, Arid, Cloudless, Normal atmosphere
Distance from primary star1E+09 KM6.844 AU
Mass9.3E+24Kg1.549 Earth masses
Surface gravity647.4 cm/sec20.66 Earth gees
Surface pressure 1587 millibars1.566 Earth atmospheres
Surface temperature-198.3° Celcius
-325.0° Fahrenheit		-212.3° C Earth temperature
-382.2° F Earth temperature
Normal temperature range
NightDay
-199.5° C
-327.1° F		 - -197.2° C
-323.0° F
MinMax
-211.7° C
-349.1° F		 - -186.3° C
-303.3° F
Equatorial radius9767.5 Km1.5 Earth radii
Density2.37 grams/cc0.43 Earth densities
Eccentricity of orbit0.071
Escape Velocity11.2 Km/sec
Molecular weight retained 0.0 and aboveH, H2, He, N, O, CH4, NH3, H2O...
Axial tilt47°
Planetary albedo 0.40
Exospheric Temperature 6.25° K-1266.75° C Earth temperature
Length of year7221.78 Earth days9201.47 Local days
19.77 Earth years
Length of day18.84 hours
Boiling point of water113.0° Celcius
235.4° Fahrenheit
Hydrosphere percentage 0.0
Cloud cover percentage 0.0
Ice cover percentage45.9


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