Gliese 777 information

Gliese 777
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Cygnus
Right ascension	20h 03m 37.41s
Declination	+29° 53′ 48.5″
Apparent magnitude (V)	+5.73 / +14.40
Characteristics
Spectral type	G6IV / M4.5V
B−V color index	0.749[citation needed]
Astrometry
Radial velocity (Rv)	-45.3[citation needed] km/s
Proper motion (μ)	RA: 683.94 ± 0.22 mas/yr ; Dec.: -524.70 ± 0.27 mas/yr
Parallax (π)	63.06 ± 0.34 mas
Distance	51.7 ± 0.3 ly ; (15.86 ± 0.09 pc)
Absolute magnitude (MV)	+4.70[citation needed] / +13.39
Details
Mass	0.82±0.17 M☉
Radius	1.061±0.013 R☉
Luminosity	1.127±0.019 L☉
Surface gravity (log g)	4.3±0.09 cgs
Temperature	5,781±37 K
Metallicity [Fe/H]	0.2 dex
Age	6.7[citation needed] Gyr
Other designations
	Gliese 777
	HD 190360: BD+29°3872, Gliese 777 A, HIP 98767, HR 7670, LHS 3510.
	G 125-55: Gliese 777 B, LHS 3509.
Database references
SIMBAD	AB
	A
	B
Exoplanet Archive	data
ARICNS	data
	data2

Gliese 777, often abbreviated as Gl 777 or GJ 777, is a yellow subgiant approximately 52 light-years away in the constellation of Cygnus. The system is also a binary star system made up of two stars and possibly a third. As of 2005, two extrasolar planets are known to orbit the primary star.

^ ^a ^b ^c ^d ^e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Ligi2016 was invoked but never defined (see the help page).

[van_Leeuwen2007-1] Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).

[Ligi2016-2] Cite error: The named reference Ligi2016 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Cygnus
Right ascension	20^h 03^m 37.41^s^[1]
Declination	+29° 53′ 48.5″^[1]
Apparent magnitude (V)	+5.73^[2] / +14.40
Characteristics
Spectral type	G6IV^[2] / M4.5V
B−V color index	0.749^{[citation needed]}
Astrometry

Radial velocity (R_v)	-45.3^{[citation needed]} km/s
Proper motion (μ)	RA: 683.94 ± 0.22^[1] mas/yr Dec.: -524.70 ± 0.27^[1] mas/yr
Parallax (π)	63.06 ± 0.34 mas^[1]
Distance	51.7 ± 0.3 ly (15.86 ± 0.09 pc)
Absolute magnitude (M_V)	+4.70^{[citation needed]} / +13.39

Details^[2]

Mass	0.82±0.17 `M`_☉
Radius	1.061±0.013 `R`_☉
Luminosity	1.127±0.019 `L`_☉
Surface gravity (log g)	4.3±0.09 cgs
Temperature	5,781±37 K
Metallicity [Fe/H]	0.2 dex
Age	6.7^{[citation needed]} Gyr

Other designations
Gliese 777
HD 190360: BD+29°3872, Gliese 777 A, HIP 98767, HR 7670, LHS 3510.
G 125-55: Gliese 777 B, LHS 3509.
Database references
SIMBAD	AB
	A
	B
Exoplanet Archive	data
ARICNS	data
	data2

Gliese 777 information

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