Exoplanet Name : |
PSR B1257+12 b |
Alternate Name : |
|
Status : |
Confirmed |
Radius (Rjup / Re): |
0.0302 |
(Rjup) |
0.3381 |
(Rearth) |
Mass (Mjup / Me): |
0.0001 |
(Mjup) |
0.0223 |
(Mearth) |
Semi Major Axis / Orbital Distance Calculated |
0.1900 |
(AU) |
0.1900 |
(AU Est.) |
Eccentricity : |
0.0000 |
Orbital Period(Yrs) |
0.0692 |
Orbital Period(Observed/Estimated) |
25.26 |
(Days Obs.) |
0.00 |
(Days Est.) |
Surface Gravity (G Earth) |
0.1947 |
Star Radiation at Atmospheric Boundary: |
0.0 |
(W/m2) |
Measured Temperature (K) |
0.0 |
(K) |
Blackbody T 0.1(K) |
2.2 |
(K) |
Blackbody T 0.3(K) |
2.1 |
(K) |
Blackbody T 0.7(K) |
1.7 |
(K) |
Tidally Locked Blackbody T 0.1(K) |
2.7 |
(K) |
Tidally Locked Blackbody T 0.3(K) |
2.5 |
(K) |
Size Class: |
Mercury-size |
Mass Class: |
|
Detection Type : |
Timing |
Mass Detection : |
|
Radius Detection : |
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
Habitability by Kopparapu: |
Not habitable |
Star Name : |
PSR B1257+12 |
Alternate Name : |
PSR J1300+1240 |
Star Distance(LY) : |
2315.7 |
Stellar Radius(Rsun) : |
0.0 |
(Rsun Estimated) |
Stellar Mass(Msun) : |
0.0 |
(Msun Measured) |
1.4 |
(Msun Estimated) |
Star Age : |
1.0 |
(GY) |
Temperature : |
5500 |
(K) |
Spectral type : |
PSR |
UV portion[%]: |
6.9 |
Visible portion[%]: |
43.2 |
IR portion[%]: |
49.9 |
Metalicity : |
0.0 |
Absolute Magnitude: |
12.7 |
Apparent Magnitude: |
22.0 |
Right Ascension(RA) |
195.0167 |
Declination (DEC) |
12.6822 |
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
Discovered by |
|
Discovery Paper - Authors |
|
Discovery Paper - Title |
|
Discovery Paper - Journal |
|
Discovery Paper - URL |
|
SIMBAD LINK |
|
Open Exoplanet Database Link |
|
![](PSR_B1257+12_b_CSun.png) |
![](PSR_B1257+12_b_CJup.png) |
![](PSR_B1257+12_b_CNep.png) |
![](PSR_B1257+12_b_CEar.png) |
/
PSR B1257+12 b
PSR B1257+12 b
PSR B1257+12 b is an exoplanet orbiting the star PSR B1257+12, located about 2315.7 light-years (710.0 pc) away from Solar System. Its discovery was publicly announced on 1992.
The host star PSR B1257+12 has apparent magnitude of 22.0, with absolute magnitude of 12.7.
In this planetary system, the extrasolar planet PSR B1257+12 b orbits around the star PSR B1257+12 every 25.3 days with its orbital distance of 0.19 AU ( 28423595.4 km)
(Projected orbit of PSR B1257+12 b around its host star PSR B1257+12)
![](PSR_B1257+12_b_Orb.png)
The Star PSR B1257+12 '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 B1257+12 b : 0.00 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star PSR B1257+12)
![](PSR_B1257+12_b_OrbH.png)
Kopparapu Recent Venus for Star PSR B1257+12 distance : 0.762 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star PSR B1257+12 distance : 0.965 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star PSR B1257+12 distance : 0.932 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star PSR B1257+12 distance : 1.022 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star PSR B1257+12 distance : 1.718 AU
Kopparapu Outer Boundary for Early Mars for Star PSR B1257+12 distance : 1.812 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star PSR B1257+12)
![](PSR_B1257+12_b_OrbK.png)
Original Kopparapu Recent Venus for Star PSR B1257+12 distance : 0.759 AU
Original Kopparapu Runaway Greenhouse for Star PSR B1257+12 distance : 0.992 AU
Original Kopparapu Moist Greenhouse for Star PSR B1257+12 distance : 1.004 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star PSR B1257+12 distance : 1.747 AU
Original Kopparapu Outer Boundary for Early Mars for Star PSR B1257+12 distance : 1.817 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star PSR B1257+12)
![](PSR_B1257+12_b_OrbKO.png)
(Position in Stellar Map of star PSR B1257+12 and its Exoplanet PSR B1257+12 b)
![](PSR_B1257+12_b_STZ0.png)
(Zoomed position in Stellar Map of star PSR B1257+12 and its Exoplanet PSR B1257+12 b (zoom level 3))
![](PSR_B1257+12_b_STZ3.png)
(Synthetic Spectrum of star PSR B1257+12*)
![](PSR_B1257+12_b_Spc.png)
*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