91 Aquarii b

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91 Aquarii b
Exoplanet List of exoplanets
Planet at Psi1 Aquarii.png
Artist's conception of planet orbiting Psi1 Aquarii, with background visual binary.
Parent star
Star 91 Aquarii A
Constellation Aquarius
Right ascension (α) 23h 15m 53.5s
Declination (δ) −9° 05′ 16″
Apparent magnitude (mV) 4.21
Distance 149.7 ± 2.0 ly
(45.9 ± 0.6 pc)
Spectral type K0III
Mass (m) 1.4 ± 0.1 M
Radius (r) 11.0 ± 0.1 R
Temperature (T) 4665 ± 18 K
Metallicity [Fe/H] -0.03 ± 0.1
Age 3.56 ± 0.63 Gyr
Orbital elements
Semi-major axis (a) 0.7 AU
Eccentricity (e) 0.027 ± 0.026
Orbital period (P) 181.4 ± 0.1 d
Argument of
periastron
(ω) 177.3 ± 0.8°
Time of periastron (T0) April 11, 2005
2453472.1 ± 24 JD
Semi-amplitude (K) 91.0 ± 2.3 m/s
Physical characteristics
Minimum mass (m sin i) 3.2 MJ
Discovery information
Discovery date 16 November 2003
Discoverer(s) Mitchell et al.
Discovery method Radial velocity
Discovery site  United States
Discovery status Published
Other designations
HD 219449 b
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data
Exoplanet Archive data
Open Exoplanet Catalogue data

91 Aquarii b, also known as HD 219449 b, is an extrasolar planet orbiting in the 91 Aquarii system approximately 148 light-years away in the constellation of Aquarius. It orbits at the average distance of 105 Gm from its star, which is slightly closer than Venus is to the sun (108 gm). The planet takes half a year to revolve around the star in a very circular orbit (e=<0.053).

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Coordinates: Sky map 23h 15m 53.5s, −09° 05′ 16″