Gliese 179

Gliese 179

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Orion
Right ascension	04h 52m 05.73s
Declination	+06° 28′ 35.5″
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 mas/yr Dec.: −309.39±2.38 mas/yr
Parallax (π)	81.38 ± 4.04 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	3424±16 K
Metallicity [Fe/H]	+0.23±0.17 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 planetary system

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

• HD 34445
• HD 126614
• HD 24496
• HD 13931
• QS Virginis
• HIP 79431
• Gliese 849
• Gliese 876
• Gliese 317
• Gliese 832
• List of extrasolar planets