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Exoplanet Name : |
Kepler-451 d |
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Alternate Name : |
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Status : |
Confirmed |
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Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
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Mass (Mjup / Me): |
1.7600 |
(Mjup) |
559.5709 |
(Mearth) |
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Semi Major Axis / Orbital Distance Calculated |
0.2000 |
(AU) |
0.2000 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.1177 |
|
Orbital Period(Observed/Estimated) |
43.00 |
(Days Obs.) |
42.18 |
(Days Est.) |
|
Surface Gravity (G Earth) |
5.4040 |
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Star Radiation at Atmospheric Boundary: |
8173.7 |
(W/m2) |
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Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
424.4 |
(K) |
|
Blackbody T 0.3(K) |
398.5 |
(K) |
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Blackbody T 0.7(K) |
322.5 |
(K) |
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Tidally Locked Blackbody T 0.1(K) |
504.7 |
(K) |
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Tidally Locked Blackbody T 0.3(K) |
473.9 |
(K) |
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Size Class: |
Jupiter-size |
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Mass Class: |
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Detection Type : |
Timing |
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Mass Detection : |
Timing |
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Radius Detection : |
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Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
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Habitability by Kopparapu: |
Not habitable |
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Star Name : |
2M 1938+46 |
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Alternate Name : |
Kepler-451 |
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Star Distance(LY) : |
0.0 |
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Stellar Radius(Rsun) : |
0.5 |
(Rsun Estimated) |
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Stellar Mass(Msun) : |
0.6 |
(Msun Measured) |
0.6 |
(Msun Estimated) |
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Star Age : |
0.0 |
(GY) |
|
Temperature : |
5500 |
(K) |
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Spectral type : |
sdB+M |
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UV portion[%]: |
6.9 |
|
Visible portion[%]: |
43.2 |
|
IR portion[%]: |
49.9 |
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Metalicity : |
0.0 |
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Absolute Magnitude: |
25.0 |
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Apparent Magnitude: |
22.0 |
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Right Ascension(RA) |
294.6375 |
|
Declination (DEC) |
46.0664 |
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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 |
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Discovery Paper - Journal |
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|
Discovery Paper - URL |
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SIMBAD LINK |
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Open Exoplanet Database Link |
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Kepler-451 d
Kepler-451 d
Kepler-451 d is an exoplanet orbiting the star 2M 1938+46. Its discovery was publicly announced on 2022.
The host star 2M 1938+46 has apparent magnitude of 22.0, with absolute magnitude of 25.0. It is 0.6 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 5500 with its spectral types of sdB+M
In this planetary system, the extrasolar planet Kepler-451 d orbits around the star 2M 1938+46 every 43.0 days with its orbital distance of 0.20 AU ( 29919574.1 km)
(Projected orbit of Kepler-451 d around its host star 2M 1938+46)
The Star 2M 1938+46 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.354 AU ( 52916884.0 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.489 AU ( 73144962.5 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.745 AU ( 111456735.9 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.096 AU ( 164013469.5 km)
Radiation at Planetary Boundary of Kepler-451 d : 8173.67 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 2M 1938+46)
Kopparapu Recent Venus for Star 2M 1938+46 distance : 0.373 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star 2M 1938+46 distance : 0.472 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star 2M 1938+46 distance : 0.456 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star 2M 1938+46 distance : 0.500 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star 2M 1938+46 distance : 0.840 AU
Kopparapu Outer Boundary for Early Mars for Star 2M 1938+46 distance : 0.886 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star 2M 1938+46)
Original Kopparapu Recent Venus for Star 2M 1938+46 distance : 0.371 AU
Original Kopparapu Runaway Greenhouse for Star 2M 1938+46 distance : 0.485 AU
Original Kopparapu Moist Greenhouse for Star 2M 1938+46 distance : 0.491 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 2M 1938+46 distance : 0.855 AU
Original Kopparapu Outer Boundary for Early Mars for Star 2M 1938+46 distance : 0.889 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star 2M 1938+46)
(Position in Stellar Map of star 2M 1938+46 and its Exoplanet Kepler-451 d)
(Zoomed position in Stellar Map of star 2M 1938+46 and its Exoplanet Kepler-451 d (zoom level 3))
(Synthetic Spectrum of star 2M 1938+46*)
*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
