Gliese 282

Gliese 282
Observation data
Epoch J2000      Equinox 2000
Constellation Monoceros
Right ascension 07h 39m 59.33s[1]
Declination −03° 35′ 51.0″
Apparent magnitude (V) (7.30 + 9.01)[2]
Characteristics
Spectral type K2V[3] + K7V[4] + M1.5Ve[5]
Apparent magnitude (U) 12.9
Apparent magnitude (B) 11.844
Apparent magnitude (V) 10.385
Apparent magnitude (R) 9.365
Apparent magnitude (I) 8.065
Apparent magnitude (J) 6.795
Apparent magnitude (H) 6.306
Apparent magnitude (K) 6.032
Variable type A: BY Dra[6]
Astrometry
Radial velocity (Rv)−18.15[7] km/s
Proper motion (μ) RA: 69.90[1] mas/yr
Dec.: -278.33[1] mas/yr
Parallax (π)91.65 ± 3.50 mas[1]
Distance36 ± 1 ly
(10.9 ± 0.4 pc)
Details
Gl 282 A
Surface gravity (log g)4.40[8] cgs
Temperature4,956[8] K
Metallicity [Fe/H]−0.12[8] dex
Rotational velocity (v sin i)1.77[6] km/s
Age300−350[5] Myr
Gl 282 B
Metallicity [Fe/H]−0.25[9] dex
Age680−720[5] Myr
Other designations
Gl 282, HD 61606, HIP 37349, WDS J07400-0336, 2MASS J07395932-0335506, V869 Mon[10]
Gl 282 A: BD−03° 2001, SAO 134954
Gl 282 B: BD−03° 2002, SAO 134958
Gl 282 C: G 112-29, NLTT 18149
Database references
SIMBADAB
A
B
C
ARICNSA
B
C

Gliese 282 is a star system composed of four stars in the equatorial constellation of Monoceros. At a distance of 36 light years, this star has an apparent magnitude of 7.26 when viewed from Earth. It is not visible to the naked eye.

The Gl 282AB star system is composed of two K- type main-sequence stars. The primary component, Gliese 282A, is a BY Draconis type variable star with a stellar classification of K2V. It has an effective temperature of 4,956 K. The companion, Gliese 282B, is a smaller, class K5V star. As of 2003, the pair had an angular separation of 58.30 arc seconds along a position angle of 113°.[2] This is equivalent to a projected physical separation of 824 AU.[5]

There is a distant common proper motion companion (G 112-29) at an angular separation of 1.09°. At the estimated distance of Gl 282AB, this corresponds to a projected separation of 55,733 AU, making it one of the widest known physical companions. Initially believed to be a red dwarf star with a stellar classification of M1.5Ve,[5] it turned out to be a pair of red dwarfs (Ca and Cb) with masses 0.55M☉ and 0.19M☉, orbiting each other on 6591+136
−177 days orbit.[11]

  1. ^ a b c d Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference mnras328_1_45 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference aj132_1_161 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference apj706_1_343 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference aa547_A106 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference APJSS141 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference aa552_A128 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aj147_1_20 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Baroch, D.; et al. (2021), "The CARMENES search for exoplanets around M dwarfs", Astronomy & Astrophysics, 653: A49, arXiv:2105.14770, doi:10.1051/0004-6361/202141031, S2CID 235253852