|
Exoplanet Name : |
PSR B1957+20 b |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
22.0000 |
(Mjup) |
6994.6360 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.0000 |
(AU) |
0.0115 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
0.0010 |
|
Orbital Period(Observed/Estimated) |
0.38 |
(Days Obs.) |
0.00 |
(Days Est.) |
|
Surface Gravity (G Earth) |
67.5495 |
|
Star Radiation at Atmospheric Boundary: |
0.0 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
9.1 |
(K) |
|
Blackbody T 0.3(K) |
8.6 |
(K) |
|
Blackbody T 0.7(K) |
6.9 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
10.9 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
10.2 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Pulsar |
|
Mass Detection : |
|
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
PSR B1957+20 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
4990.2 |
|
Stellar Radius(Rsun) : |
0.0 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
1.4 |
(Msun Measured) |
1.4 |
(Msun Estimated) |
|
Star Age : |
2.2 |
(GY) |
|
Temperature : |
5500 |
(K) |
|
Spectral type : |
PSR |
|
UV portion[%]: |
6.9 |
|
Visible portion[%]: |
43.2 |
|
IR portion[%]: |
49.9 |
|
Metalicity : |
0.0 |
|
Absolute Magnitude: |
11.1 |
|
Apparent Magnitude: |
22.0 |
|
Right Ascension(RA) |
299.9032 |
|
Declination (DEC) |
20.8042 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
0 |
|
Discovery Paper - Title |
0 |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=PSR+B1957%2B20+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
0 |
 |
 |
 |
 |
/
PSR B1957+20 b
PSR B1957+20 b
PSR B1957+20 b is an exoplanet orbiting the star PSR B1957+20, located about 4990.2 light-years (1530.0 pc) away from Solar System. Its discovery was publicly announced on 1988.
The host star PSR B1957+20 has apparent magnitude of 22.0, with absolute magnitude of 11.1. It is 1.4 times more massive compared with our Sun. The surface temperature is 5500 with its spectral types of PSR
In this planetary system, the extrasolar planet PSR B1957+20 b orbits around the star PSR B1957+20 every 0.4 days with its orbital distance of 0.01 AU ( 1718292.1 km)
(Projected orbit of PSR B1957+20 b around its host star PSR B1957+20)
The Star PSR B1957+20 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.000 AU ( 1409.2 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.000 AU ( 1947.8 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 0.000 AU ( 2968.1 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 0.000 AU ( 4367.6 km)
Radiation at Planetary Boundary of PSR B1957+20 b : 0.00 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star PSR B1957+20)
Kopparapu Recent Venus for Star PSR B1957+20 distance : 0.762 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star PSR B1957+20 distance : 0.965 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star PSR B1957+20 distance : 0.932 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star PSR B1957+20 distance : 1.022 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star PSR B1957+20 distance : 1.718 AU
Kopparapu Outer Boundary for Early Mars for Star PSR B1957+20 distance : 1.812 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star PSR B1957+20)
Original Kopparapu Recent Venus for Star PSR B1957+20 distance : 0.759 AU
Original Kopparapu Runaway Greenhouse for Star PSR B1957+20 distance : 0.992 AU
Original Kopparapu Moist Greenhouse for Star PSR B1957+20 distance : 1.004 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star PSR B1957+20 distance : 1.747 AU
Original Kopparapu Outer Boundary for Early Mars for Star PSR B1957+20 distance : 1.817 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star PSR B1957+20)
(Position in Stellar Map of star PSR B1957+20 and its Exoplanet PSR B1957+20 b)
(Zoomed position in Stellar Map of star PSR B1957+20 and its Exoplanet PSR B1957+20 b (zoom level 3))
(Synthetic Spectrum of star PSR B1957+20*)
*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
