|
Exoplanet Name : |
BD+20 274 c |
|
Alternate Name : |
|
|
Status : |
Suspended |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
4.2000 |
(Mjup) |
1335.3396 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
1.3000 |
(AU) |
1.3000 |
(AU Est.) |
|
Eccentricity : |
0.0000 |
|
Orbital Period(Yrs) |
1.5830 |
|
Orbital Period(Observed/Estimated) |
578.20 |
(Days Obs.) |
605.29 |
(Days Est.) |
|
Surface Gravity (G Earth) |
12.8958 |
|
Star Radiation at Atmospheric Boundary: |
73972.0 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
736.1 |
(K) |
|
Blackbody T 0.3(K) |
691.2 |
(K) |
|
Blackbody T 0.7(K) |
559.3 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
875.3 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
822.0 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
|
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
BD+20 274 |
|
Alternate Name : |
|
|
Star Distance(LY) : |
3545.2 |
|
Stellar Radius(Rsun) : |
17.3 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
0.8 |
(Msun Measured) |
0.9 |
(Msun Estimated) |
|
Star Age : |
0.0 |
(GY) |
|
Temperature : |
4296 |
(K) |
|
Spectral type : |
K5 |
|
UV portion[%]: |
0.9 |
|
Visible portion[%]: |
27.5 |
|
IR portion[%]: |
71.6 |
|
Metalicity : |
-0.5 |
|
Absolute Magnitude: |
-0.8 |
|
Apparent Magnitude: |
9.4 |
|
Right Ascension(RA) |
25.9203 |
|
Declination (DEC) |
21.0050 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
01211-00603 |
|
Discovered by |
|
|
Discovery Paper - Authors |
"Gettel,.; Wolszczan,.; Niedzielski,.; Nowak,.; Adam_w,.; Zieli_ski,.; Maciejewski,." |
|
Discovery Paper - Title |
Planets around the K-giants BD+20 274 and HD 219415 |
|
Discovery Paper - Journal |
"The Astrophysical Journal,olume 756,umber 1" |
|
Discovery Paper - URL |
http://iopscience.iop.org/article/10.1088/0004-637X/756/1/53/meta |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BD%2B20+274+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/BD%2B20%20274%20b/ |
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BD+20 274 c
BD+20 274 c
BD+20 274 c is an exoplanet orbiting the star BD+20 274, located about 3545.2 light-years (1087.0 pc) away from Solar System. Its discovery was publicly announced on 2012.
The host star BD+20 274 has apparent magnitude of 9.4, with absolute magnitude of -0.8. It is 0.8 times more massive and 17.3 times bigger compared with our Sun. The surface temperature is 4296 with its spectral types of K5
In this planetary system, the extrasolar planet BD+20 274 c orbits around the star BD+20 274 every 578.2 days with its orbital distance of 1.30 AU ( 194477231.9 km)
(Projected orbit of BD+20 274 c around its host star BD+20 274)
The Star BD+20 274 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 6.917 AU ( 1034743628.7 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 9.561 AU ( 1430286105.7 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 14.569 AU ( 2179439503.5 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 21.438 AU ( 3207140704.5 km)
Radiation at Planetary Boundary of BD+20 274 c : 73972.01 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star BD+20 274)
Kopparapu Recent Venus for Star BD+20 274 distance : 7.690 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star BD+20 274 distance : 9.734 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star BD+20 274 distance : 9.402 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star BD+20 274 distance : 10.329 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star BD+20 274 distance : 18.206 AU
Kopparapu Outer Boundary for Early Mars for Star BD+20 274 distance : 19.206 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star BD+20 274)
Original Kopparapu Recent Venus for Star BD+20 274 distance : 7.588 AU
Original Kopparapu Runaway Greenhouse for Star BD+20 274 distance : 10.056 AU
Original Kopparapu Moist Greenhouse for Star BD+20 274 distance : 10.040 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star BD+20 274 distance : 18.500 AU
Original Kopparapu Outer Boundary for Early Mars for Star BD+20 274 distance : 19.240 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star BD+20 274)
(Position in Stellar Map of star BD+20 274 and its Exoplanet BD+20 274 c)
(Zoomed position in Stellar Map of star BD+20 274 and its Exoplanet BD+20 274 c (zoom level 3))
(Synthetic Spectrum of star BD+20 274*)
*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
