Gliese 832

Gliese 832
Gliese 832 is located in the constellation Grus.
Gliese 832 is located in the constellation Grus.
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[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 (Rv)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]
Distance16.200 ± 0.002 ly
(4.9671 ± 0.0006 pc)
Absolute magnitude (MV)10.19[2]
Details
Mass0.441 ± 0.011[4] M☉
Radius0.442 ± 0.018[4] R☉
Luminosity (bolometric)0.0276 ± 0.0009 [4] L☉
Luminosity (visual, LV)0.007[note 1] L☉
Surface gravity (log g)4.7[2] cgs
Temperature3,539+79
−74[4] K
Metallicity [Fe/H]−0.06 ± 0.04[5] dex
Rotation37.5+1.4
−1.5 d[6]
Age6±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
SIMBADThe star
planet c
planet b
Exoplanet Archivedata
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]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference bailey08 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference mnras452_3_2745 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Pineda2021 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Lindgren2017 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Gorrini2022 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Mike Wall was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aa575_A35 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Schmitt was invoked but never defined (see the help page).
  11. ^ 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. arXiv:1608.00934. Bibcode:2016ApJ...830..154F. doi:10.3847/0004-637X/830/2/154. hdl:11336/21732. S2CID 119279568.


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