HD 154857 b

HD 154857 b
Exoplanet List of exoplanets
Parent star
Star HD 154857
Constellation Ara
Right ascension (α) 17h 11m 15.7219s
Declination (δ) –56° 40 50.865
Distance223.55 ly
(68.54 pc)
Spectral type G5V
Orbital elements
Semi-major axis(a) 1.2±0.2 AU
Periastron (q) 0.64 AU
Apastron (Q) 1.8 AU
Eccentricity (e) 0.47±0.02
Orbital period(P) 409±1 d
(1.12 y)
Argument of
periastron
(ω) 59±4°
Time of periastron (T0) 2450346±5 JD
Semi-amplitude (K) 50.4±1 m/s
Physical characteristics
Mass(m)>1.8±0.4 MJ
(>570±100 M)
Discovery information
Discovery date 2004
Discoverer(s) McCarthy et al.
AAT
 Australia
Discovery method Radial velocity
Discovery site AAPS
Discovery status Published
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

HD 154857 b is an extrasolar planet approximately 224 light years away in the constellation of Ara. This is a gas giant mass that orbits the star in an eccentric orbit. This planet was detected by using Anglo-Australian Telescope (AAT) UCLE spectrometer.[1][2]

References

  1. McCarthy, Chris; et al. (2004). "Multiple Companions to HD 154857 and HD 160691". The Astrophysical Journal 617 (1): 575–579. arXiv:astro-ph/0409335. Bibcode:2004ApJ...617..575M. doi:10.1086/425214.
  2. O'Toole, Simon J.; et al. (2007). "New Planets around Three G Dwarfs". The Astrophysical Journal 660 (2): 1636–1641. arXiv:astro-ph/0702213. Bibcode:2007ApJ...660.1636O. doi:10.1086/513563.

External links

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


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