HD 215497 b

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 215497 b
Extrasolar planet List of extrasolar planets
HD 215497 b SuperEarth.png
Artist's conception of HD 215497 b, as a hot "super-Earth".
Parent star
Star HD 215497
Constellation Tucana
Right ascension (α) 22h 46m 36.755s[1]
Declination (δ) –56° 35′ 58.32″[1]
Apparent magnitude (mV) 8.97
Distance 142 ± 7[1] ly
(44 ± 2[1] pc)
Spectral type K3V
Mass (m) 0.872 ± 0.023[2] M
Radius (r) 1.01 ± 0.11 R
Temperature (T) 5113 ± 93[2] K
Metallicity [Fe/H] 0.23 ± 0.07[2]
Orbital elements
Semimajor axis (a) 0.047[2] AU
Eccentricity (e) 0.16 ± 0.09[2]
Orbital period (P) 3.93404 ± 0.00066[2] d
Argument of
periastron
(ω) 96 ± 34[2]°
Time of periastron (T0) 2,454,858.95 ± 0.37[2] JD
Semi-amplitude (K) 2.98 ± 0.34[2] m/s
Physical characteristics
Minimum mass (m sin i) 0.02[2] MJ
(6.6[2] M)
Discovery information
Discovery date October 19, 2009
Discoverer(s) Lo Curto et al.
Discovery method Radial velocity (HARPS)
Discovery site La Silla Observatory
Discovery status Published[2]
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data

HD 215497 b is an extrasolar planet which orbits the K-type main sequence star HD 215497, located approximately 142 light years away in the constellation Tucana. This planet has at least 6.6 times the mass of Earth.[2] This planet was detected by HARPS on October 19, 2009, together with 29 other planets, including HD 215497 c.

References[edit]

Coordinates: Sky map 22h 46m 36.7543s, −56° 35′ 58.322″