HD 179079

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 179079
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aquila
Right ascension 19h 11m 09.8291s[1]
Declination −02° 38′ 18.185″[1]
Apparent magnitude (V) 7.96[2]
Characteristics
Spectral type G5IV[3]
Apparent magnitude (B) 8.66[2]
Apparent magnitude (J) 6.734[2]
Apparent magnitude (H) 6.402[2]
Apparent magnitude (K) 6.311[2]
B−V color index 0.70[2]
Astrometry
Proper motion (μ) RA: −133.89 ± 0.80[1] mas/yr
Dec.: −90.10 ± 0.58[1] mas/yr
Parallax (π) 15.26 ± 0.77[1] mas
Distance 210 ± 10 ly
(66 ± 3 pc)
Absolute magnitude (MV) 3.9[4]
Details
Mass 1.087 ± 0.1[3] M
Radius 1.48[3] R
Metallicity [Fe/H] 0.29 ± 0.04[3] dex
Other designations
BD−02 4881, HIP 94256, PPM 202620, SAO 143111.[2]
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia
data

HD 179079 is a G-type subgiant star in the constellation of Aquila.[3] It has an apparent visual magnitude of approximately 7.96.[2] It is larger than our Sun as it has a radius of approximately 1.48 solar radii.[3] An exoplanet, HD 179079 b, was announced in August 2009 to be orbiting this star. The planet was detected by the radial velocity method, using the HIRES spectrometer at Keck Observatory.[5]

The HD 179079 planetary system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥0.08 MJ 0.11 14.476 ± 0.011 0.115 ± 0.087

See also[edit]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b c d e f g h HIP 94256 -- Star, database entry, SIMBAD. Accessed on line September 2, 2009.
  3. ^ a b c d e f g Star : HD 179079, entry, Extrasolar Planets Encyclopaedia. Accessed on line September 2, 2009.
  4. ^ From apparent magnitude and parallax.
  5. ^ Valenti, Jeff A. et al. (2009). "Two Exoplanets Discovered at Keck Observatory". The Astrophysical Journal 702 (2): 989–997. arXiv:0908.1612. Bibcode:2009ApJ...702..989V. doi:10.1088/0004-637X/702/2/989. 

Coordinates: Sky map 19h 11m 09.8291s, −02° 38′ 18.185″