GJ 1005

GJ 1005

GJ 1005 Location of GJ 1005 in the constellation Cetus
Observation data Epoch J2000        Equinox J2000
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  mas [3]
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☉
Radius	0.23  R☉
Temperature	3,341±224 [6]   K
Metallicity [Fe/H]	−0.41 [5]   dex
GJ 1005 B
Mass	0.112±0.001  M☉
Other designations
Gaia DR2 2368293487260807040, HIP 1242, G 158-50, G 266-76, LHS 1047, LP 764-87, LTT 114, 2MASS J00152799-1608008
Database references
SIMBAD	data
ARICNS	A
	B

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. van Leeuwen, F.; et al. (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. S2CID   18759600.
2. 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. Bibcode:2010MNRAS.403.1949K. doi: 10.1111/j.1365-2966.2009.16182.x .
3. Benedict, G. F.; Henry, T. J.; Franz, O. G.; McArthur, B. E.; Wasserman, L. H.; Jao, Wei-Chun; Cargile, P. A.; Dieterich, S. B.; Bradley, A. J.; Nelan, E. P.; Whipple, A. L. (2016). "The Solar Neighborhood. XXXVII. The Mass–Luminosity Relation for Main-Sequence M Dwarfs". The Astronomical Journal. 152 (5): 141. arXiv: 1608.04775 . Bibcode:2016AJ....152..141B. doi: 10.3847/0004-6256/152/5/141 . S2CID   54029447.
4. Nidever, David L.; et al. (2013). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series. 141 (2): 503–522. arXiv: astro-ph/0112477 . Bibcode:2002ApJS..141..503N. doi:10.1086/340570. S2CID   51814894.
5. Mann, Andrew W.; Dupuy, Trent; Kraus, Adam L.; Gaidos, Eric; Ansdell, Megan; Ireland, Michael; Rizzuto, Aaron C.; Hung, Chao-Ling; Dittmann, Jason; Factor, Samuel; Feiden, Gregory; Martinez, Raquel A.; Ruíz-Rodríguez, Dary; Chia Thao, Pa (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. arXiv: 1811.06938 . Bibcode:2019ApJ...871...63M. doi: 10.3847/1538-4357/aaf3bc . S2CID   119372932.
6. 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. arXiv: 2110.01658 . doi: 10.1093/mnras/stab2831 .
7. Hershey, John L.; Taff, L. G. (1998-01-01). "Hubble Space Telescope Fine Guidance Sensor Astrometry of the Low-Mass Binary L722-22". The Astronomical Journal. 116 (3): 1440. Bibcode:1998AJ....116.1440H. doi: 10.1086/300516 . ISSN   1538-3881.