GJ 1005

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.

GJ 1005
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]
Distance19.58 ± 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
Mass0.179 ± 0.002 M
Temperature3341±224[6] K
Metallicity [Fe/H]-0.41[5] dex
GJ 1005 B
Mass0.112 ± 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
SIMBADdata
ARICNSA
B
GJ 1005 is located in the constellation Cetus.
GJ 1005 is located in the constellation Cetus.
GJ 1005
Location of GJ 1005 in the constellation Cetus

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.
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