Gliese 179

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Gliese 179
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Orion
Right ascension 04h 52m 05.73s[1]
Declination +06° 28′ 35.5″[1]
Apparent magnitude (V) 11.96
Characteristics
Spectral type M4V
Apparent magnitude (U) 14.791
Apparent magnitude (B) 13.56
Apparent magnitude (R) 10.854
Apparent magnitude (I) 9.334
Apparent magnitude (J) 7.814
Apparent magnitude (H) 7.209
Apparent magnitude (K) 6.942
U−B color index 1.23
B−V color index 1.60
V−R color index 1.11
R−I color index 1.520
Variable type none
Astrometry
Radial velocity (Rv) –9.1 km/s
Proper motion (μ) RA: 142.98 ± 4.06[1] mas/yr
Dec.: -309.39 ± 2.38[1] mas/yr
Parallax (π) 81.38 ± 4.04[1] mas
Distance 40 ± 2 ly
(12.3 ± 0.6 pc)
Absolute magnitude (MV) 11.54
Details
Mass 0.357 M
Radius 0.38 R
Luminosity 0.016 L
Surface gravity (log g) 4.83 cgs
Temperature 3,424 ± 16[2] K
Metallicity [Fe/H] +0.23 ± 0.17[2] dex
Other designations
G 83-37, G 84-15, G 82-52, HIP 22627, LTT 11525, NLTT 14088, Ross 401, Wolf 1539
Database references
SIMBAD data
Exoplanet Archive data
ARICNS data
Extrasolar Planets
Encyclopaedia
data

Gliese 179 is a 12th magnitude M-type main sequence star located approximately 40 light years away in the constellation Orion. This star is smaller, cooler, fainter, and less massive than our Sun. Also its metal content is twice as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.

The Gliese 179 system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥0.82 ± 0.07 MJ 2.41 ± 0.04 2288 ± 59 0.21 ± 0.08

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 Rojas-Ayala, Bárbara et al. (April 2012). "Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs". The Astrophysical Journal 748 (2): 93. arXiv:1112.4567. Bibcode:2012ApJ...748...93R. doi:10.1088/0004-637X/748/2/93. 
  3. ^ Howard, Andrew W. et al. (2010). "The California Planet Survey. I. Four New Giant Exoplanets". The Astrophysical Journal 721 (2): 1467–1481. arXiv:1003.3488. Bibcode:2010ApJ...721.1467H. doi:10.1088/0004-637X/721/2/1467. 

Coordinates: Sky map 04h 52m 05.7273s, +06° 28′ 35.542″