Astronomy:GJ 1005
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Short description: Star system in the constellation Cetus
Coordinates: 
00h 15m 28.11090s, −16° 08′ 01.6303″
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cetus |
| Right ascension | 00h 15m 28.11090s[1] |
| Declination | −16° 08′ 01.6303″[1] |
| Apparent magnitude (V) | 11.483[2] |
| Characteristics | |
| Spectral type | M3.5V[3] |
| Astrometry | |
| Radial velocity (Rv) | -26.43 ± 0.1[4] km/s |
| Proper motion (μ) | RA: 731.83[1] mas/yr Dec.: -607.73[1] mas/yr |
| Parallax (π) | 166.6 ± 0.3[3] mas |
| Distance | 19.58 ± 0.04 ly (6.00 ± 0.01 pc) |
| Absolute magnitude (MV) | 12.70 ± 0.01 / 15.12 ± 0.09[3] |
| Orbit[3] | |
| Period (P) | 4.55726+0.00075−0.00074 y.[5] |
| Semi-major axis (a) | 0.3037 ± 0.0005″ |
| Eccentricity (e) | 0.36136+0.00097−0.00098[5] |
| Inclination (i) | 143.93+0.25−0.24[5]° |
| Longitude of the node (Ω) | 62.8 ± 0.4° |
| Periastron epoch (T) | JD 2449850.4 ± 0.8 |
| Argument of periastron (ω) (secondary) | 166.6 ± 0.5° |
| Details[3] | |
| GJ 1005 A | |
| Mass | 0.179 ± 0.002 M☉ |
| Temperature | 3341±224[6] K |
| Metallicity [Fe/H] | -0.41[5] dex |
| GJ 1005 B | |
| Mass | 0.112 ± 0.001 M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | A |
| B | |
  GJ 1005 Location of GJ 1005 in the constellation Cetus | |
GJ 1005 is a system of two red dwarfs, located in constellation Cetus at 19.6 light-years from Earth.[7] The primary star is a M4V class star while the secondary is a class M7V.[citation needed]
The system was observed with the Hubble Space Telescope in the 1990s with its Fine Guidance Sensor.[7] This data helped determine the mass of each of the components of L722-22/ LHS 1047 / GJ 1005.[7]
References
- ↑ 1.0 1.1 1.2 1.3 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL.
- ↑ Koen, C.; Kilkenny, D.; van Wyk, F.; Marang, F. (2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society 403 (4): 1949–1968. doi:10.1111/j.1365-2966.2009.16182.x. Bibcode: 2010MNRAS.403.1949K.
- ↑ 3.0 3.1 3.2 3.3 3.4 Benedict, G. F.; Henry, T. J.; Franz, O. G.; McArthur, B. E.; Wasserman, L. H.; Jao, Wei-Chun; Cargile, P. A.; Dieterich, S. B. et al. (2016). "The Solar Neighborhood. XXXVII. The Mass–Luminosity Relation for Main-Sequence M Dwarfs". The Astronomical Journal 152 (5): 141. doi:10.3847/0004-6256/152/5/141. Bibcode: 2016AJ....152..141B.
- ↑ Nidever, David L. (2013). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series 141 (2): 503–522. doi:10.1086/340570. Bibcode: 2002ApJS..141..503N.
- ↑ 5.0 5.1 5.2 5.3 Mann, Andrew W.; Dupuy, Trent; Kraus, Adam L.; Gaidos, Eric; Ansdell, Megan; Ireland, Michael; Rizzuto, Aaron C.; Hung, Chao-Ling et al. (2019), "How to Constrain Your M Dwarf. II. The Mass–Luminosity–Metallicity Relation from 0.075 to 0.70 Solar Masses", The Astrophysical Journal 871 (1): 63, doi:10.3847/1538-4357/aaf3bc, Bibcode: 2019ApJ...871...63M
- ↑ Costa-Almeida, Ellen; De Mello, Gustavo F Porto; Giribaldi, Riano E.; Lorenzo-Oliveira, Diego; Ubaldo-Melo, Maria L. (2021), "M dwarf spectral indices at moderate resolution: Accurate Teff and [Fe/H] for 178 southern stars", Monthly Notices of the Royal Astronomical Society 508 (4): 5148–5162, doi:10.1093/mnras/stab2831
- ↑ 7.0 7.1 7.2 Hershey, John L.; Taff, L. G. (1998-01-01). "Hubble Space Telescope Fine Guidance Sensor Astrometry of the Low-Mass Binary L722-22" (in en). The Astronomical Journal 116 (3): 1440. doi:10.1086/300516. ISSN 1538-3881. Bibcode: 1998AJ....116.1440H. http://stacks.iop.org/1538-3881/116/i=3/a=1440.
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