HD 154857 c

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HD 154857 c
Exoplanet List of exoplanets
Parent star
Star HD 154857
Constellation Ara
Right ascension (α) 17h 11m 15.7219s
Declination (δ) –56° 40′ 50.865″
Distance 223.55 ly
(68.54 pc)
Spectral type G5V
Orbital elements
Semi-major axis (a) 5.36 AU
Eccentricity (e) 0.06
Orbital period (P) 3470 d
(9.5 y)
Semi-amplitude (K) >23 m/s
Physical characteristics
Minimum mass (m sin i) 2.6 MJ
Discovery information
Discovery date 9 February 2007
Discoverer(s) O’Toole
Discovery method Doppler spectroscopy
Discovery site  Australia
Discovery status Published
Other designations
HIP 84069 c, SAO 244491 c
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

HD 154857 c is an extrasolar planet located approximately 224 light-years away in the constellation of Ara, orbiting the star HD 154857. This planet takes about 3470 days (9.5 years) to orbit the star.

The first signs of this planet were noticed on 9 February 2007 by O’Toole in Australia using the method Doppler spectroscopy, along with HD 23127 b and HD 159868 b. The orbit had not yet been completely observed, so the values quoted were lower limits. The previously unconstrained orbital period and minimum mass were constrained in January 2014.[1][2]

See also[edit]


  1. ^ O'Toole, Simon J.; et al. (2007). "New Planets around Three G Dwarfs". The Astrophysical Journal. 660 (2): 1636–1641. Bibcode:2007ApJ...660.1636O. arXiv:astro-ph/0702213Freely accessible. doi:10.1086/513563. 
  2. ^ The Anglo-Australian Planet Search. XXIII. Two New Jupiter Analogs: Robert A. Wittenmyer, Jonathan Horner, C.G. Tinney, R.P. Butler, H.R.A. Jones, Mikko Tuomi, G.S. Salter, B.D. Carter, F. Elliott Koch, S.J. O'Toole, J. Bailey, D. Wright

External links[edit]

Coordinates: Sky map 17h 11m 15.7219s, −56° 40′ 50.865″