Gliese 832 information

Gliese 832
	Gliese 832 Location of Gliese 832 in the constellation Grus;
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Grus
Right ascension	21h 33m 33.97512s
Declination	−49° 00′ 32.3994″
Apparent magnitude (V)	8.66
Characteristics
Evolutionary stage	main-sequence star
Spectral type	M2V
B−V color index	1.52
Astrometry
Radial velocity (Rv)	12.72±0.13 km/s
Proper motion (μ)	RA: −45.917 mas/yr ; Dec.: −816.875 mas/yr
Parallax (π)	201.3252 ± 0.0237 mas
Distance	16.200 ± 0.002 ly ; (4.9671 ± 0.0006 pc)
Absolute magnitude (MV)	10.19
Details
Mass	0.441 ± 0.011 M☉
Radius	0.442 ± 0.018 R☉
Luminosity (bolometric)	0.0276 ± 0.0009 L☉
Luminosity (visual, LV)	0.007 L☉
Surface gravity (log g)	4.7 cgs
Temperature	3,539+79; −74 K
Metallicity [Fe/H]	−0.06 ± 0.04 dex
Rotation	37.5+1.4; −1.5 d
Age	6±1.5 Gyr
Other designations
	CD−49°13515, GJ 832, HD 204961, HIP 106440, L 354-89, LHS 3685, PLX 5190, TIC 139754153, TYC 8431-60-1, 2MASS J21333397-4900323
Database references
SIMBAD	The star
	planet c
	planet b
Exoplanet Archive	data
Data sources:
Hipparcos Catalogue,; HD

Gliese 832 (Gl 832 or GJ 832) is a red dwarf of spectral type M2V in the southern constellation Grus.^[8] The apparent visual magnitude of 8.66^[2] means that it is too faint to be seen with the naked eye. It is located relatively close to the Sun, at a distance of 16.2 light years^[1] and has a high proper motion of 818.16 milliarcseconds per year.^[1] Gliese 832 has just under half the mass and radius of the Sun.^[8] Its estimated rotation period is a relatively leisurely 46 days.^[3] The star is roughly 6 billion years old.^[6]

This star achieved perihelion some 52,920 years ago when it came within an estimated 15.71 ly (4.817 pc) of the Sun.^[9]

Gliese 832 emits X-rays.^[10] Despite the strong flare activity, Gliese 832 is producing on average less ionizing radiation than the Sun. Only at extremely short radiation wavelengths (<50nm) does its radiation intensity rise above the level of quiet Sun, but does not reach levels typical for active Sun.^[11]

^ ^a ^b ^c ^d ^e ^f ^g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
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^ ^a ^b ^c ^d Cite error: The named reference Pineda2021 was invoked but never defined (see the help page).
^ Cite error: The named reference Lindgren2017 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Gorrini2022 was invoked but never defined (see the help page).
^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Mike Wall was invoked but never defined (see the help page).
^ Cite error: The named reference aa575_A35 was invoked but never defined (see the help page).
^ Cite error: The named reference Schmitt was invoked but never defined (see the help page).
^ Fontenla, J. M.; Linsky, Jeffrey L.; Garrison, Jesse; France, Kevin; Buccino, A.; Mauas, Pablo; Vietes, Mariela; Walkowicz, Lucianne M. (2016). "Semi-Empirical Modeling of the Photosphere, Chromopshere, Transition Region, and Corona of the M-Dwarf Host Star Gj 832". The Astrophysical Journal. 830 (2): 154. Bibcode:2016ApJ...830..154F. doi:10.3847/0004-637X/830/2/154. hdl:11336/21732. S2CID 119279568.

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[GaiaDR3-1] ^ ^a ^b ^c ^d ^e ^f ^g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).

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[mnras452_3_2745-3] Cite error: The named reference mnras452_3_2745 was invoked but never defined (see the help page).

[Pineda2021-4] Cite error: The named reference Pineda2021 was invoked but never defined (see the help page).

[Lindgren2017-6] Cite error: The named reference Lindgren2017 was invoked but never defined (see the help page).

[Gorrini2022-7] Cite error: The named reference Gorrini2022 was invoked but never defined (see the help page).

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

[Mike_Wall-9] Cite error: The named reference Mike Wall was invoked but never defined (see the help page).

[aa575_A35-10] Cite error: The named reference aa575_A35 was invoked but never defined (see the help page).

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[12] Fontenla, J. M.; Linsky, Jeffrey L.; Garrison, Jesse; France, Kevin; Buccino, A.; Mauas, Pablo; Vietes, Mariela; Walkowicz, Lucianne M. (2016). "Semi-Empirical Modeling of the Photosphere, Chromopshere, Transition Region, and Corona of the M-Dwarf Host Star Gj 832". The Astrophysical Journal. 830 (2): 154. Bibcode:2016ApJ...830..154F. doi:10.3847/0004-637X/830/2/154. hdl:11336/21732. S2CID 119279568.

Observation data Epoch J2000.0 Equinox J2000.0
Gliese 832 Location of Gliese 832 in the constellation Grus
Constellation	Grus
Right ascension	21^h 33^m 33.97512^s^[1]
Declination	−49° 00′ 32.3994″^[1]
Apparent magnitude (V)	8.66^[2]
Characteristics
Evolutionary stage	main-sequence star
Spectral type	M2V^[3]
B−V color index	1.52^[2]
Astrometry

Radial velocity (R_v)	12.72±0.13^[1] km/s
Proper motion (μ)	RA: −45.917 mas/yr^[1] Dec.: −816.875 mas/yr^[1]
Parallax (π)	201.3252 ± 0.0237 mas^[1]
Distance	16.200 ± 0.002 ly (4.9671 ± 0.0006 pc)
Absolute magnitude (M_V)	10.19^[2]

Details

Mass	0.441 ± 0.011^[4] `M`_☉
Radius	0.442 ± 0.018^[4] `R`_☉
Luminosity (bolometric)	0.0276 ± 0.0009 ^[4] `L`_☉
Luminosity (visual, L_V)	0.007^{[note 1]} `L`_☉
Surface gravity (log g)	4.7^[2] cgs
Temperature	3,539+79 −74^[4] K
Metallicity [Fe/H]	−0.06 ± 0.04^[5] dex
Rotation	37.5+1.4 −1.5 d^[6]
Age	6±1.5^[6] Gyr

Other designations
CD−49°13515, GJ 832, HD 204961, HIP 106440, L 354-89, LHS 3685, PLX 5190, TIC 139754153, TYC 8431-60-1, 2MASS J21333397-4900323^[7]
Database references
SIMBAD	The star
	planet c
	planet b
Exoplanet Archive	data
Data sources:
Hipparcos Catalogue, HD

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