Gliese 623

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Gliese 623
Gliese 623.jpg
Gliese 623, imaged by the Hubble Space Telescope. The fainter companion is to the right.
Observation data
Epoch J2000       Equinox J2000
Constellation Hercules
Right ascension 16h 24m 09.314s [1]
Declination +48° 21′ 11.11″ [1]
Characteristics
Spectral type M3.0V [2]
Astrometry
Radial velocity (Rv)−28.06±0.59 [1] km/s
Proper motion (μ)RA: 1,145.2 mas/yr [3]
Dec.: −450.7 mas/yr [3]
Parallax (π)125.0±0.3  mas [3]
Distance 26.09 ± 0.06  ly
(8.00 ± 0.02  pc)
Orbit [3]
Period (P)1,367.4±0.6 d
Semi-major axis (a)1.894±0.019  AU [4]
Eccentricity (e)0.629±0.004
Inclination (i)152.5±0.2°
Longitude of the node (Ω)98.3±0.5°
Periastron epoch (T)45838.7±2.8
Argument of periastron (ω)
(secondary)		245.4±0.5°
Argument of periastron (ω)
(primary)		65.4±0.5°
Details
A
Mass 0.379±0.007 [3]   M☉
Radius 0.404 ± 0.024 [5] [a]   R☉
Luminosity 0.0196+0.0024
−0.0021 [5]   L☉
Temperature 3,400±25 [5]   K
B
Mass 0.114±0.002 [3]   M☉
Radius 0.133 ± 0.008 [5] [b]   R☉
Luminosity0.00103+0.00013
−0.00011 [5]   L☉
Temperature 2,840±27 [5]   K
Other designations
GJ 623, HIP 80346, G 202-45, LHS 417 [2]
Database references
SIMBAD data
Hercules constellation map.svg
Red pog.png
Gliese 623
Location of Gliese 623 in the constellation Hercules

Gliese 623 is a dim binary star 26.09 light-years from Earth in the constellation Hercules. It was photographed by the NASA/ESA Hubble Space Telescope's Faint Object Camera in 1994. [6] The binary system consists of two red dwarfs orbiting each other at a distance of 1.9 astronomical units. [4]

Contents

See also

Notes

  1. ↑ Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of 5,772  K:
  2. ↑ Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of 5,772  K:

References

  1. 1 2 3 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  2. 1 2 "G 202-45". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 18 March 2025.
  3. 1 2 3 4 5 6 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. 1 2 Martinache, Frantz; Lloyd, James P.; Ireland, Michael J.; Yamada, Ryan S.; Tuthill, Peter G. (2007). "Precision Masses of the Low-Mass Binary System GJ 623". The Astrophysical Journal. 661 (1): 496–501. arXiv: astro-ph/0612138 . Bibcode:2007ApJ...661..496M. doi:10.1086/513868. S2CID   14648386.
  5. 1 2 3 4 5 6 Hillenbrand, Lynne A.; White, Russel J. (2004-04-01). "An Assessment of Dynamical Mass Constraints on Pre-Main-Sequence Evolutionary Tracks". The Astrophysical Journal. 604 (2): 741. arXiv: astro-ph/0312189 . Bibcode:2004ApJ...604..741H. doi:10.1086/382021. ISSN   0004-637X.
  6. ↑ Barbieri, C.; De Marchi, G.; Nota, A.; Corrain, G.; Hack, W.; Ragazzoni, R.; MacChetto, D. (November 1996). "First HST/FOC images of the low mass companion of the astrometric binary Gliese 623". Astronomy and Astrophysics . 315 (1): 418–420. Bibcode:1996A&A...315..418B.


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