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 | 3424±16[2] K |
| Metallicity [Fe/H] | +0.23±0.17[2] dex |
| Other designations | |
| 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.
| 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
References
- 1 2 3 4 5 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
- 1 2 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.
- ↑ 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: 
04h 52m 05.7273s, +06° 28′ 35.542″
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