|
Exoplanet Name : |
HD 23439 Ab |
|
Alternate Name : |
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Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1592 |
(Rjup) |
1.7841 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0290 |
(Mjup) |
9.2202 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.2131 |
(AU) |
0.2131 |
(AU Est.) |
|
Eccentricity : |
0.5000 |
|
Orbital Period(Yrs) |
0.1251 |
|
Orbital Period(Observed/Estimated) |
45.68 |
(Days Obs.) |
38.75 |
(Days Est.) |
|
Surface Gravity (G Earth) |
2.8968 |
|
Star Radiation at Atmospheric Boundary: |
9534.8 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
441.0 |
(K) |
|
Blackbody T 0.3(K) |
414.2 |
(K) |
|
Blackbody T 0.7(K) |
335.1 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
524.5 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
492.5 |
(K) |
|
Size Class: |
super-Earth-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
Radial Velocity |
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
HD 23439 A |
|
Alternate Name : |
"*V580 Per, GJ 1064 A, GJ 9130 A" |
|
Star Distance(LY) : |
77.9 |
|
Stellar Radius(Rsun) : |
0.7 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.9 |
(Msun Measured) |
0.6 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
5098 |
(K) |
|
Spectral type : |
K2V |
|
UV portion[%]: |
3.9 |
|
Visible portion[%]: |
38.4 |
|
IR portion[%]: |
57.7 |
|
Metalicity : |
-1.1 |
|
Absolute Magnitude: |
6.2 |
|
Apparent Magnitude: |
8.1 |
|
Right Ascension(RA) |
56.7588 |
|
Declination (DEC) |
41.4273 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
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Discovered by |
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|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
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|
SIMBAD LINK |
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|
Open Exoplanet Database Link |
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/
HD 23439 Ab
HD 23439 Ab
HD 23439 Ab is an exoplanet orbiting the star HD 23439 A, located about 77.9 light-years (23.9 pc) away from Solar System. Its discovery was publicly announced on 2020.
The host star HD 23439 A has apparent magnitude of 8.1, with absolute magnitude of 6.2. It is 0.9 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 5098 with its spectral types of K2V
In this planetary system, the extrasolar planet HD 23439 Ab orbits around the star HD 23439 A every 45.7 days with its orbital distance of 0.21 AU ( 31879306.2 km)
(Projected orbit of HD 23439 Ab around its host star HD 23439 A)
The Star HD 23439 A 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.407 AU ( 60897024.4 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.563 AU ( 84175602.0 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.857 AU ( 128264989.4 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.262 AU ( 188747550.8 km)
Radiation at Planetary Boundary of HD 23439 Ab : 9534.85 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 23439 A)
Kopparapu Recent Venus for Star HD 23439 A distance : 0.438 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 23439 A distance : 0.555 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 23439 A distance : 0.536 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 23439 A distance : 0.588 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 23439 A distance : 1.002 AU
Kopparapu Outer Boundary for Early Mars for Star HD 23439 A distance : 1.057 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 23439 A)
Original Kopparapu Recent Venus for Star HD 23439 A distance : 0.434 AU
Original Kopparapu Runaway Greenhouse for Star HD 23439 A distance : 0.572 AU
Original Kopparapu Moist Greenhouse for Star HD 23439 A distance : 0.574 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 23439 A distance : 1.019 AU
Original Kopparapu Outer Boundary for Early Mars for Star HD 23439 A distance : 1.059 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 23439 A)
(Position in Stellar Map of star HD 23439 A and its Exoplanet HD 23439 Ab)
(Zoomed position in Stellar Map of star HD 23439 A and its Exoplanet HD 23439 Ab (zoom level 3))
(Synthetic Spectrum of star HD 23439 A*)
*Yamashiki YA et al. 2019 ApJ 881 114
MUSCLES Paper I - France et al. 2016 ApJ 820 89
MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102
