Gliese 317 information

Gliese 317
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Pyxis
Right ascension	08h 40m 59.2056s
Declination	−23° 27′ 22.5986″
Apparent magnitude (V)	11.98
Characteristics
Spectral type	M2.5V
V−R color index	0.338
Astrometry
Radial velocity (Rv)	87.8 km/s
Proper motion (μ)	RA: −461.162±0.139 mas/yr ; Dec.: 805.571±0.126 mas/yr
Parallax (π)	65.7744 ± 0.0557 mas
Distance	49.59 ± 0.04 ly ; (15.20 ± 0.01 pc)
Absolute magnitude (MV)	11.06±0.04
Details
Mass	0.42±0.05 M☉
Radius	0.4170±0.0013 R☉
Luminosity	0.02175±0.00034 L☉
Temperature	3,510±50 K
Metallicity [Fe/H]	+0.3 dex
Rotation	69 days
Age	~5 Gyr
Other designations
	GJ 317, LFT 538, LHS 2037, LPM 296, LTT 3215
Database references
SIMBAD	data
Exoplanet Archive	data

Gliese 317 is a small red dwarf star with two exoplanetary companions^[3]^[8] in the southern constellation of Pyxis. It is located at a distance of 49.6 light-years from the Sun based on parallax measurements,^[1] and is drifting further away with a radial velocity of +87.8 km/s.^[3] This star is too faint to be viewed with the naked eye, having an apparent visual magnitude of 11.98^[2] and an absolute magnitude of 11.06.^[3]

This is an M-type main-sequence star with a stellar classification of M2.5V.^[3] Photometric calibrations and infrared spectroscopic measurements indicate that the star is enriched in heavy elements compared to the Sun.^[5] The star is estimated to be roughly five billion years old and has a low activity level for a star of its class.^[3] It has 42%^[3]^[4] of the mass and radius of the Sun and is spinning with a rotation period of 69 days.^[6] The star is radiating 2.2%^[4] of the Sun's luminosity from its photosphere at an effective temperature of 3,510 K.^[3]

^ ^a ^b ^c ^d ^e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Zach2013 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ Cite error: The named reference a12 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference Schweitzer_et_al_2019 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference m12 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Feng_et_al_2020 was invoked but never defined (see the help page).
^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
^ Cite error: The named reference j07 was invoked but never defined (see the help page).

[Gaia_DR2-1] Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).

[Zach2013-2] Cite error: The named reference Zach2013 was invoked but never defined (see the help page).

[a12-3] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ Cite error: The named reference a12 was invoked but never defined (see the help page).

[Schweitzer_et_al_2019-4] Cite error: The named reference Schweitzer_et_al_2019 was invoked but never defined (see the help page).

[m12-5] Cite error: The named reference m12 was invoked but never defined (see the help page).

[Feng_et_al_2020-6] Cite error: The named reference Feng_et_al_2020 was invoked but never defined (see the help page).

[SIMBAD-7] Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

[j07-8] Cite error: The named reference j07 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Pyxis
Right ascension	08^h 40^m 59.2056^s^[1]
Declination	−23° 27′ 22.5986″^[1]
Apparent magnitude (V)	11.98^[2]
Characteristics
Spectral type	M2.5V^[3]
V−R color index	0.338^[2]
Astrometry

Radial velocity (R_v)	87.8^[3] km/s
Proper motion (μ)	RA: −461.162±0.139 mas/yr^[1] Dec.: 805.571±0.126 mas/yr^[1]
Parallax (π)	65.7744 ± 0.0557 mas^[1]
Distance	49.59 ± 0.04 ly (15.20 ± 0.01 pc)
Absolute magnitude (M_V)	11.06±0.04^[3]

Details

Mass	0.42±0.05^[3] `M`_☉
Radius	0.4170±0.0013^[4] `R`_☉
Luminosity	0.02175±0.00034^[4] `L`_☉
Temperature	3,510±50^[3] K
Metallicity [Fe/H]	+0.3^[3]^[5] dex
Rotation	69 days^[6]
Age	~5^[3] Gyr

Other designations
GJ 317, LFT 538, LHS 2037, LPM 296, LTT 3215^[7]
Database references
SIMBAD	data
Exoplanet Archive	data

Gliese 317 information

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