|
Exoplanet Name : |
HR 8799 d |
|
Alternate Name : |
|
|
Status : |
Confirmed |
|
Radius (Rjup / Re): |
1.2000 |
(Rjup) |
13.4508 |
(Rearth) |
|
Mass (Mjup / Me): |
8.3000 |
(Mjup) |
2638.8854 |
(Mearth) |
|
Semi Major Axis / Orbital Distance Calculated |
27.0000 |
(AU) |
27.0000 |
(AU Est.) |
|
Eccentricity : |
0.1000 |
|
Orbital Period(Yrs) |
112.3966 |
|
Orbital Period(Observed/Estimated) |
41054.00 |
(Days Obs.) |
41027.36 |
(Days Est.) |
|
Surface Gravity (G Earth) |
14.5856 |
|
Star Radiation at Atmospheric Boundary: |
18.0 |
(W/m2) |
|
Measured Temperature (K) |
0.0 |
(K) |
|
Blackbody T 0.1(K) |
92.0 |
(K) |
|
Blackbody T 0.3(K) |
86.4 |
(K) |
|
Blackbody T 0.7(K) |
69.9 |
(K) |
|
Tidally Locked Blackbody T 0.1(K) |
109.4 |
(K) |
|
Tidally Locked Blackbody T 0.3(K) |
102.7 |
(K) |
|
Size Class: |
Jupiter-size |
|
Mass Class: |
|
|
Detection Type : |
Imaging |
|
Mass Detection : |
Spectrum |
|
Radius Detection : |
|
|
Habitability by Solar Eq. Astronomical Unit: |
Not habitable |
|
Habitability by Kopparapu: |
Not habitable |
|
Star Name : |
HR 8799 |
|
Alternate Name : |
HD 218396 |
|
Star Distance(LY) : |
118.8 |
|
Stellar Radius(Rsun) : |
1.5 |
(Rsun Measured) |
|
Stellar Mass(Msun) : |
1.6 |
(Msun Measured) |
1.6 |
(Msun Estimated) |
|
Star Age : |
0.1 |
(GY) |
|
Temperature : |
8310 |
(K) |
|
Spectral type : |
A5V |
|
UV portion[%]: |
0.3 |
|
Visible portion[%]: |
1.5 |
|
IR portion[%]: |
98.2 |
|
Metalicity : |
-0.5 |
|
Absolute Magnitude: |
3.2 |
|
Apparent Magnitude: |
6.0 |
|
Right Ascension(RA) |
346.8708 |
|
Declination (DEC) |
21.1342 |
|
Hubble Space Telescope Guide Star Catalog (GSC) ID |
|
|
Discovered by |
|
|
Discovery Paper - Authors |
"Baines,llyn.; White,ussel.; Huber,aniel; Jones,eremy; Boyajian,abetha; McAlister,arold.; tenrummelaar,heo.; Turner,ils.; Sturmann,udit; Sturmann,aszlo; Goldfinger,..; Farrington,hristopher.; Riedel,dric.; Ireland,ichael; vonraun,aspar; Ridgway,tephen." |
|
Discovery Paper - Title |
The CHARA Array Angular Diameter of HR 8799 Favors Planetary Masses for its Imaged Companions |
|
Discovery Paper - Journal |
0 |
|
Discovery Paper - URL |
0 |
|
SIMBAD LINK |
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HR+8799+&submit=SIMBAD+search |
|
Open Exoplanet Database Link |
http://www.openexoplanetcatalogue.com/planet/HR%208799%20d/ |
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HR 8799 d
HR 8799 d
HR 8799 d is an exoplanet orbiting the star HR 8799, located about 118.8 light-years (36.4 pc) away from Solar System. Its discovery was publicly announced on 2008.
The host star HR 8799 has apparent magnitude of 6.0, with absolute magnitude of 3.2. It is 1.6 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 8310 with its spectral types of A5V
In this planetary system, the extrasolar planet HR 8799 d orbits around the star HR 8799 every 41054.0 days with its orbital distance of 27.00 AU ( 4039142508.9 km)
(Projected orbit of HR 8799 d around its host star HR 8799)
The Star HR 8799 's habitable zone is located at the following distance
Inner Boundary (the orbital distance at Venus's Equivalent Radiation )
: 2.244 AU ( 335700060.2 km)
Earth Boundary (the orbital distance at Earth's Equivalent Radiation)
: 3.102 AU ( 464025212.1 km)
Outer Boundary (the orbital distance at Mars's Equivalent Radiation)
: 4.726 AU ( 707071734.6 km)
Snow Line (the orbital distance at Snow Line Equivalent Radiation)
: 6.955 AU ( 1040487032.3 km)
Radiation at Planetary Boundary of HR 8799 d : 18.05 W/m2
(Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HR 8799)
Kopparapu Recent Venus for Star HR 8799 distance : 2.120 AU
Kopparapu Runaway Greenhouse for Earth-sized planet for Star HR 8799 distance : 2.686 AU
Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HR 8799 distance : 2.594 AU
Kopparapu Runaway Greenhouse for Mars-sized planet for Star HR 8799 distance : 2.838 AU
Kopparapu Outer Boundary for Maximum Greenhouse for Star HR 8799 distance : 4.634 AU
Kopparapu Outer Boundary for Early Mars for Star HR 8799 distance : 4.886 AU
(Habitable zone calculated based on Kopparapu et al.(2013) around the star HR 8799)
Original Kopparapu Recent Venus for Star HR 8799 distance : 2.201 AU
Original Kopparapu Runaway Greenhouse for Star HR 8799 distance : 2.739 AU
Original Kopparapu Moist Greenhouse for Star HR 8799 distance : 2.913 AU
Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HR 8799 distance : 4.714 AU
Original Kopparapu Outer Boundary for Early Mars for Star HR 8799 distance : 4.902 AU
(Habitable zone calculated based on Kopparapu et al.(Original) around the star HR 8799)
(Position in Stellar Map of star HR 8799 and its Exoplanet HR 8799 d)
(Zoomed position in Stellar Map of star HR 8799 and its Exoplanet HR 8799 d (zoom level 3))
(Synthetic Spectrum of star HR 8799*)
*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
