|
Exoplanet Name : |
HIP 77257 b |
|
Alternate Name : |
HD 141004 b |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.2110 |
(Rjup) |
2.3651 |
(Rearth) |
|
Mass (Mjup / Me): |
0.0428 |
(Mjup) |
13.6077 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.1238 |
(AU) |
0.1238 |
(AU Est.) |
|
Eccentricity : |
0.1600 |
|
Orbital Period(Yrs) |
0.0425 |
|
Orbital Period(Observed/Estimated) |
15.51 |
(Days Obs.) |
20.51 |
(Days Est.) |
|
Surface Gravity (G Earth) |
2.4328 |
|
Star Radiation at Atmospheric Boundary: |
107017.5 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
807.2 |
(K) |
|
Blackbody T 0.3(K) |
758.1 |
(K) |
|
Blackbody T 0.7(K) |
613.4 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
960.0 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
901.5 |
(K) |
|
Size Class: |
sub-Neptune-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 : |
HIP 77257 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
38.9 |
|
Stellar Radius(Rsun) : |
1.0 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
0.6 |
(Msun Measured) |
1.1 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
6050 |
(K) |
|
Spectral type : |
G0 |
|
UV portion[%]: |
0.3 |
|
Visible portion[%]: |
1.5 |
|
IR portion[%]: |
98.2 |
|
Metalicity : |
0.0 |
|
Absolute Magnitude: |
21.6 |
|
Apparent Magnitude: |
22.0 |
|
Right Ascension(RA) |
236.6125 |
|
Declination (DEC) |
7.3531 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
|
|
SIMBAD LINK |
https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HIP+77257&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
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HIP 77257 b
HIP 77257 b
HIP 77257 b is an exoplanet orbiting the star HIP 77257, located about 38.9 light-years (11.9 pc) away from Solar System. Its discovery was publicly announced on 2021.
The host star HIP 77257 has apparent magnitude of 22.0, with absolute magnitude of 21.6. It is 0.6 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 6050 with its spectral types of G0
In this planetary system, the extrasolar planet HIP 77257 b orbits around the star HIP 77257 every 15.5 days with its orbital distance of 0.12 AU ( 18520216.4 km)
(Projected orbit of HIP 77257 b around its host star HIP 77257)
The Star HIP 77257 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.792 AU ( 118523320.6 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 1.095 AU ( 163830203.0 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.669 AU ( 249640973.8 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 2.456 AU ( 367357629.0 km)
Radiation at Planetary Boundary of HIP 77257 b : 107017.53 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HIP 77257)
Kopparapu Recent Venus for Star HIP 77257 distance : 0.808 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HIP 77257 distance : 1.023 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HIP 77257 distance : 0.988 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HIP 77257 distance : 1.083 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 77257 distance : 1.794 AU
Kopparapu Outer Boundary for Early Mars for Star HIP 77257 distance : 1.893 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HIP 77257)
Original Kopparapu Recent Venus for Star HIP 77257 distance : 0.813 AU
Original Kopparapu Runaway Greenhouse for Star HIP 77257 distance : 1.050 AU
Original Kopparapu Moist Greenhouse for Star HIP 77257 distance : 1.076 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 77257 distance : 1.826 AU
Original Kopparapu Outer Boundary for Early Mars for Star HIP 77257 distance : 1.899 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HIP 77257)
(Position in Stellar Map of star HIP 77257 and its Exoplanet HIP 77257 b)
(Zoomed position in Stellar Map of star HIP 77257 and its Exoplanet HIP 77257 b (zoom level 3))
(Synthetic Spectrum of star HIP 77257*)
*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
