Mu Arae e

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Mu Arae e
Exoplanet List of exoplanets
Parent star
Star Mu Arae
Constellation Ara
Right ascension (α) 17h 44m 08.7s
Declination (δ) −51° 50′ 03″
Apparent magnitude (mV) 5.15
Distance 50.6 ± 0.2 ly
(15.51 ± 0.07 pc)
Spectral type G3IV–V
Mass (m) 1.10 ± 0.01 M
Radius (r) 1.36 ± 0.01 R
Temperature (T) 5820 ± 40 K
Metallicity [Fe/H] 0.30 ± 0.01
Age 6.34 ± 0.40 Gyr
Orbital elements
Semi-major axis (a) 5.235[1] AU
(783.1 Gm)
Periastron (q) 4.719 AU
(705.9 Gm)
Apastron (Q) 5.750 AU
(860.3 Gm)
Eccentricity (e) 0.0985 ± 0.0627[1]
Orbital period (P) 4205.8 ± 758.9[1] d
(11.51 y)
Argument of
(ω) 57.6 ± 43.7[1]°
Time of periastron (T0) 2,450,541 ± 96[1] JD
Semi-amplitude (K) 18.1 ± 1.1[1] m/s
Physical characteristics
Minimum mass (m sin i) 1.814[1] MJ
(576 M)
Discovery information
Discovery date June 13, 2002
Discoverer(s) Butler, Marcy
Discovery method Radial velocity
Discovery site California,  USA
Discovery status Published
Other designations
HD 160691 e
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

Mu Arae e (also known as HD 160691 e) is one of the four extrasolar planets orbiting the star Mu Arae. Its discovery was announced on June 13, 2002. Mu Arae e is a gas giant at least 1.8 times as massive as Jupiter. The planet orbits at Jupiter-like distance at 5.235 AU.

The planet and its host star is one of the planetary systems selected by the International Astronomical Union as part of their public process for giving proper names to exoplanets and their host star (where no proper name already exists).[2][3] The process involves public nomination and voting for the new names, and the IAU plans to announce the new names in mid-November 2015.[4]


  1. ^ a b c d e f g Pepe, F.; Correia, A. C. M.; Mayor, M.; Tamuz, O.; et al. (2007). "The HARPS search for southern extra-solar planets. VIII. μ Arae, a system with four planets". Astronomy and Astrophysics 462 (2): 769–776. arXiv:astro-ph/0608396. Bibcode:2007A&A...462..769P. doi:10.1051/0004-6361:20066194. 
  2. ^ NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars. 9 July 2014
  3. ^ NameExoWorlds.
  4. ^ NameExoWorlds.

Coordinates: Sky map 17h 44m 08.7s, −51° 50′ 03″