23 Librae b

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23 Librae b
Exoplanet List of exoplanets
Parent star
Star 23 Librae
Constellation Libra
Right ascension (α) 15h 13m 28s
Declination (δ) –25° 18′ 33″
Apparent magnitude (mV) 6.45
Distance 83.7 ly
(25.6 pc)
Mass (m) 1.05 M
Radius (r) 1.2 R
Temperature (T) 5559 K
Metallicity [Fe/H] 0.23
Age 7.32 Gyr
Orbital elements
Semi-major axis (a) 0.81 ± 0.02 AU
Eccentricity (e) 0.233 ± 0.002
Orbital period (P) 258.19 ± 0.07 d
(0.7069 y)
Argument of
periastron
(ω) 358.3 ± 3.7°
Time of periastron (T0) 2,450,331.7 ± 2.2 JD
Semi-amplitude (K) 49.52 ± 0.57 m/s
Physical characteristics
Minimum mass (m sin i) 1.59 ± 0.02 MJ
Discovery information
Discovery date November 1, 1999[1]
Discoverer(s) Vogt et al.[2]
Discovery method Radial velocity
Discovery site Keck Observatory[1]
Discovery status Published[2]
Other designations
HD 134987 b
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data
Exoplanet Archive data
Open Exoplanet Catalogue data

23 Librae b (23 Lib b) is an extrasolar Jovian planet discovered in November 1999 orbiting the star 23 Librae. It orbits in its star's habitable zone.[1][2][3]

As of 1999, the planet was known to have at least 1.5 times Jupiter's mass. The planet orbits 23 Librae at an average distance of 0.82 AUs, which is between that of Venus and the Earth in the Solar System.[4]

References[edit]

  1. ^ a b c "Astronomers discover six new planets orbiting nearby stars" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. November 1, 1999. Retrieved December 19, 2017. 
  2. ^ a b c Vogt, Steven S.; et al. (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal. 536 (2): 902–914. arXiv:astro-ph/9911506Freely accessible. Bibcode:2000ApJ...536..902V. doi:10.1086/308981. 
  3. ^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493Freely accessible. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. 
  4. ^ Jones, Hugh R. A.; et al. (2010). "A long-period planet orbiting a nearby Sun-like star". Monthly Notices of the Royal Astronomical Society. 403 (4): 1703–1713. arXiv:0912.2716Freely accessible. Bibcode:2010MNRAS.403.1703J. doi:10.1111/j.1365-2966.2009.16232.x. 

Coordinates: Sky map 15h 13m 28s, −25° 18′ 33″