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Exoplanet Name : |
HD 217786 Ac |
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Alternate Name : |
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Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.1502 |
(Rjup) |
1.6831 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0230 |
(Mjup) |
7.3126 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0380 |
(AU) |
0.0380 |
(AU Est.) |
|
Eccentricity : |
0.3990 |
|
Orbital Period(Yrs) |
0.0068 |
|
Orbital Period(Observed/Estimated) |
2.50 |
(Days Obs.) |
2.68 |
(Days Est.) |
|
Surface Gravity (G Earth) |
2.5814 |
|
Star Radiation at Atmospheric Boundary: |
1735313.9 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
1619.9 |
(K) |
|
Blackbody T 0.3(K) |
1521.3 |
(K) |
|
Blackbody T 0.7(K) |
1230.9 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
1926.4 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
1809.1 |
(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 |
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Star Name : |
HD 217786 A |
|
Alternate Name : |
HD 217786 |
|
Star Distance(LY) : |
178.7 |
|
Stellar Radius(Rsun) : |
1.3 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.0 |
(Msun Measured) |
1.2 |
(Msun Estimated) |
|
Star Age : |
7.6 |
(GY) |
|
Temperature : |
5966 |
(K) |
|
Spectral type : |
F8V |
|
UV portion[%]: |
0.3 |
|
Visible portion[%]: |
1.5 |
|
IR portion[%]: |
98.2 |
|
Metalicity : |
-0.1 |
|
Absolute Magnitude: |
4.1 |
|
Apparent Magnitude: |
7.8 |
|
Right Ascension(RA) |
345.7833 |
|
Declination (DEC) |
0.4297 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
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Discovered by |
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Discovery Paper - Authors |
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|
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 217786 Ac
HD 217786 Ac
HD 217786 Ac is an exoplanet orbiting the star HD 217786 A, located about 178.7 light-years (54.8 pc) away from Solar System. Its discovery was publicly announced on 2022.
The host star HD 217786 A has apparent magnitude of 7.8, with absolute magnitude of 4.1. It is 1.0 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 5966 with its spectral types of F8V
In this planetary system, the extrasolar planet HD 217786 Ac orbits around the star HD 217786 A every 2.5 days with its orbital distance of 0.04 AU ( 5684719.1 km)
(Projected orbit of HD 217786 Ac around its host star HD 217786 A)
The Star HD 217786 A 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.979 AU ( 146496865.2 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 1.354 AU ( 202496951.9 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 2.063 AU ( 308560542.2 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 3.035 AU ( 454060355.0 km)
Radiation at Planetary Boundary of HD 217786 Ac : 1735313.94 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 217786 A)
Kopparapu Recent Venus for Star HD 217786 A distance : 1.003 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 217786 A distance : 1.271 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 217786 A distance : 1.227 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 217786 A distance : 1.345 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 217786 A distance : 2.233 AU
Kopparapu Outer Boundary for Early Mars for Star HD 217786 A distance : 2.356 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 217786 A)
Original Kopparapu Recent Venus for Star HD 217786 A distance : 1.009 AU
Original Kopparapu Runaway Greenhouse for Star HD 217786 A distance : 1.305 AU
Original Kopparapu Moist Greenhouse for Star HD 217786 A distance : 1.335 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 217786 A distance : 2.273 AU
Original Kopparapu Outer Boundary for Early Mars for Star HD 217786 A distance : 2.364 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 217786 A)
(Position in Stellar Map of star HD 217786 A and its Exoplanet HD 217786 Ac)
(Zoomed position in Stellar Map of star HD 217786 A and its Exoplanet HD 217786 Ac (zoom level 3))
(Synthetic Spectrum of star HD 217786 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
