GJ 1005

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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]
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
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
Cetus constellation map.svg
Red pog.png
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]

Related Research Articles

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<span class="mw-page-title-main">Delta Cephei</span> Binary star system in the constellation Cepheus

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<span class="mw-page-title-main">Theta Cygni</span> Star in the constellation Cygnus

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<span class="mw-page-title-main">Gliese 22</span> Star in the constellation Cassiopeia

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<span class="mw-page-title-main">HD 139664</span> Star in the constellation Lupus

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<span class="mw-page-title-main">Y Sagittarii</span> Variable star in the constellation of Sagittarius

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<span class="mw-page-title-main">51 Eridani</span> F-type main sequence star in the constellation Eridanus

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<span class="mw-page-title-main">Tucana-Horologium association</span> Large stellar association

The Tucana-Horologium association (Tuc-Hor), or Tucana Horologium moving group, is a stellar association with an age of 45 ± 4 Myr and it is one of the largest stellar associations within 100 parsecs. The association has a similar size to the Beta Pictoris moving group (BPMG) and contains, like BPMG, more than 12 stars with spectral type B, A and F. The association is named after two southern constellations, the constellation Tucana and the constellation Horologium.

References

  1. 1 2 3 4 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. 1 2 3 4 5 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. 1 2 3 4 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. 1 2 3 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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