|
Exoplanet Name : |
pi2 UMa b |
|
Alternate Name : |
4 UMa b |
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
0.9078 |
(Rjup) |
10.1759 |
(Rearth) |
|
Mass (Mjup / Me): |
7.1000 |
(Mjup) |
2257.3598 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
0.8700 |
(AU) |
0.8700 |
(AU Est.) |
|
Eccentricity : |
0.4320 |
|
Orbital Period(Yrs) |
0.7373 |
|
Orbital Period(Observed/Estimated) |
269.30 |
(Days Obs.) |
266.82 |
(Days Est.) |
|
Surface Gravity (G Earth) |
21.8001 |
|
Star Radiation at Atmospheric Boundary: |
825.6 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
239.2 |
(K) |
|
Blackbody T 0.3(K) |
224.7 |
(K) |
|
Blackbody T 0.7(K) |
181.8 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
284.5 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
267.2 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Radial Velocity |
|
Mass Detection : |
|
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
pi2 UMa |
|
Alternate Name : |
4 UMa |
|
Star Distance(LY) : |
256.0 |
|
Stellar Radius(Rsun) : |
1.2 |
(Rsun Estimated) |
|
Stellar Mass(Msun) : |
1.2 |
(Msun Measured) |
1.2 |
(Msun Estimated) |
|
Star Age : |
4.6 |
(GY) |
|
Temperature : |
4415 |
(K) |
|
Spectral type : |
K1III |
|
UV portion[%]: |
1.3 |
|
Visible portion[%]: |
29.6 |
|
IR portion[%]: |
69.1 |
|
Metalicity : |
-0.2 |
|
Absolute Magnitude: |
1.3 |
|
Apparent Magnitude: |
5.8 |
|
Right Ascension(RA) |
130.0542 |
|
Declination (DEC) |
64.3281 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
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Discovered by |
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Discovery Paper - Authors |
|
|
Discovery Paper - Title |
|
|
Discovery Paper - Journal |
|
|
Discovery Paper - URL |
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|
SIMBAD LINK |
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Open Exoplanet Database Link |
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pi2 UMa b
pi2 UMa b
pi2 UMa b is an exoplanet orbiting the star pi2 UMa, located about 256.0 light-years (78.5 pc) away from Solar System. Its discovery was publicly announced on 2007.
The host star pi2 UMa has apparent magnitude of 5.8, with absolute magnitude of 1.3. It is 1.2 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 4415 with its spectral types of K1III
In this planetary system, the extrasolar planet pi2 UMa b orbits around the star pi2 UMa every 269.3 days with its orbital distance of 0.87 AU ( 130150147.5 km)
(Projected orbit of pi2 UMa b around its host star pi2 UMa)
The Star pi2 UMa 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 0.489 AU ( 73157123.5 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 0.676 AU ( 101122262.9 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 1.030 AU ( 154087950.4 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 1.516 AU ( 226747169.2 km)
Radiation at Planetary Boundary of pi2 UMa b : 825.59 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star pi2 UMa)
Kopparapu Recent Venus for Star pi2 UMa distance : 0.542 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star pi2 UMa distance : 0.686 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star pi2 UMa distance : 0.662 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star pi2 UMa distance : 0.727 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star pi2 UMa distance : 1.275 AU
Kopparapu Outer Boundary for Early Mars for Star pi2 UMa distance : 1.345 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star pi2 UMa)
Original Kopparapu Recent Venus for Star pi2 UMa distance : 0.534 AU
Original Kopparapu Runaway Greenhouse for Star pi2 UMa distance : 0.708 AU
Original Kopparapu Moist Greenhouse for Star pi2 UMa distance : 0.707 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star pi2 UMa distance : 1.296 AU
Original Kopparapu Outer Boundary for Early Mars for Star pi2 UMa distance : 1.348 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star pi2 UMa)
(Position in Stellar Map of star pi2 UMa and its Exoplanet pi2 UMa b)
(Zoomed position in Stellar Map of star pi2 UMa and its Exoplanet pi2 UMa b (zoom level 3))
(Synthetic Spectrum of star pi2 UMa*)
*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
