Eta2 Hydri b

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Eta2 Hydri b
Exoplanet List of exoplanets
Parent star
Star Eta2 Hydri
Constellation Hydrus
Right ascension (α) 01h 54m 56s
Declination (δ) −67° 38′ 50″
Distance 216.89 ly
(66.53 pc)
Spectral type G8.5III
Orbital elements
Semi-major axis (a) 1.93 AU
Eccentricity (e) 0.40±0.07
Orbital period (P) 711±8 d
Argument of
(ω) 351.5±9.5°
Time of periastron (T0) 2,451,420 JD
Semi-amplitude (K) 105±8 m/s
Physical characteristics
Mass (m) >6.54 MJ
Discovery information
Discovery date 25 May 2005
Discoverer(s) Setiawan et al.
Discovery method Radial velocity
Discovery site Chile La Silla
Discovery status Published

Eta2 Hydri b2 Hyi b, η2 Hydri b), commonly known as HD 11977 b, is an extrasolar planet that is approximately 217 light-years away in the constellation of Hydrus. The presence of the planet around an intermediately massive giant star provides indirect evidence for the existence of planetary systems around A-type stars.


External links[edit]

Coordinates: Sky map 01h 54m 56s, −67° 38′ 50″