Astronomy:Gliese 623
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Short description: Star system in the constellation Hercules
Coordinates: 
16h 24m 09.32495s, +48° 21′ 10.4611″
300px Gliese 623, imaged by the Hubble Space Telescope. The fainter companion is to the right. | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[3] mas/yr Dec.: −450.7[3] mas/yr |
| Parallax (π) | 125.0 ± 0.3[3] mas |
| 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 astronomical unit|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 periapsis (ω) (primary) | 65.4±0.5° |
| Details | |
| A | |
| Mass | 0.379±0.007[3] M☉ |
| Radius | 0.404 ± 0.024[5][lower-alpha 1] 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][lower-alpha 2] R☉ |
| Luminosity | 0.00103+0.00013 −0.00011[5] L☉ |
| Temperature | 2,840±27[5] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
  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]
See also
Notes
- ↑ 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:
- ↑ 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
- ↑ 1.0 1.1 1.2 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 "G 202-45". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=G+202-45.
- ↑ 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.
- ↑ 4.0 4.1 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. doi:10.1086/513868. Bibcode: 2007ApJ...661..496M. http://www.iop.org/EJ/article/0004-637X/661/1/496/70964.html.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 Hillenbrand, Lynne A.; White, Russel J. (2004-04-01). "An Assessment of Dynamical Mass Constraints on Pre-Main-Sequence Evolutionary Tracks" (in en). The Astrophysical Journal 604 (2): 741. doi:10.1086/382021. ISSN 0004-637X. Bibcode: 2004ApJ...604..741H.
- ↑ 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.
External links
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