Gliese 623

Gliese 623
	; 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
Declination	+48° 21′ 11.11″
Characteristics
Spectral type	M3.0V
Astrometry
Radial velocity (Rv)	−28.06±0.59 km/s
Proper motion (μ)	RA: 1,151.232 mas/yr ; Dec.: −499.079 mas/yr
Parallax (π)	127.4785±0.4818 mas
Distance	25.59 ± 0.10 ly ; (7.84 ± 0.03 pc)
Orbit
Period (P)	1365.6±0.3 d
Semi-major axis (a)	1.894±0.019 AU
Eccentricity (e)	0.631±0.002
Inclination (i)	154.0±0.1°
Longitude of the node (Ω)	98.5±0.47°
Periastron epoch (T)	1313.3±0.6 reduced JD
Argument of periastron (ω); (secondary)	248.68±0.46°
Details
Primary (A)
Mass	0.371±0.015 M☉
Secondary (B)
Mass	0.115±0.0023 M☉
Other designations
	GJ 623, HIP 80346, G 202-45, LHS 417
Database references
SIMBAD	data
	Gliese 623 Location of Gliese 623 in the constellation Hercules;

Gliese 623 is a dim binary star 25.6 light-years from Earth in the constellation Hercules. It was photographed by the NASA/ESA Hubble Space Telescope's Faint Object Camera in 1994.^[4] The binary system consists of two red dwarfs orbiting each other at a distance of 1.9 astronomical units.^[3]

References

^ ^a ^b ^c ^d ^e 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.
^ ^a ^b "G 202-45". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 March 2025.
^ ^a ^b ^c 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.
^ 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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Observation data Epoch J2000 Equinox J2000
Gliese 623, imaged by the Hubble Space Telescope. The fainter companion is to the right.
Constellation	Hercules
Right ascension	16^h 24^m 09.314^s^[1]
Declination	+48° 21′ 11.11″^[1]
Characteristics
Spectral type	M3.0V^[2]
Astrometry

Radial velocity (R_v)	−28.06±0.59^[1] km/s
Proper motion (μ)	RA: 1,151.232 mas/yr^[1] Dec.: −499.079 mas/yr^[1]
Parallax (π)	127.4785±0.4818 mas^[1]
Distance	25.59 ± 0.10 ly (7.84 ± 0.03 pc)

Orbit^[3]
Period (P)	1365.6±0.3 d
Semi-major axis (a)	1.894±0.019 AU
Eccentricity (e)	0.631±0.002
Inclination (i)	154.0±0.1°
Longitude of the node (Ω)	98.5±0.47°
Periastron epoch (T)	1313.3±0.6 reduced JD
Argument of periastron (ω) (secondary)	248.68±0.46°
Details^[3]
Primary (A)
Mass	0.371±0.015 `M`_☉
Secondary (B)
Mass	0.115±0.0023 `M`_☉
Other designations
GJ 623, HIP 80346, G 202-45, LHS 417^[2]
Database references
SIMBAD	data
Gliese 623 Location of Gliese 623 in the constellation Hercules