Gliese 674

Gliese 674
Gliese 674 is located in the constellation Ara.
Gliese 674 is located in the constellation Ara.
Gliese 674
Location of Gliese 674 in the constellation Ara

Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 28m 39.94558s[1]
Declination –46° 53′ 42.6881″[1]
Apparent magnitude (V) 9.38[2]
Characteristics
Spectral type M3V[3]
U−B color index 1.20[4]
B−V color index 1.553±0.017[2]
R−I color index 1.33[4]
Astrometry
Radial velocity (Rv)−2.904±0.0004[5] km/s
Proper motion (μ) RA: 572.568(40) mas/yr[1]
Dec.: −880.583(27) mas/yr[1]
Parallax (π)219.6463 ± 0.0262 mas[1]
Distance14.849 ± 0.002 ly
(4.5528 ± 0.0005 pc)
Absolute magnitude (MV)11.09[2]
Details
Mass0.353±0.008[6] M☉
Radius0.361+0.012
−0.011[6] R☉
Luminosity0.01575±0.00037[6] L☉
Temperature3,404+59
−57[6] K
Metallicity [Fe/H]−0.30±0.08[6] dex
Rotation32.9±0.1 d[7]
Rotational velocity (v sin i)3.2±1.2[3] km/s
Age0.1–1.0[8] Gyr
Other designations
CD−46°11540, GJ 674, HIP 85523, LFT 1351, LHS 449, LPM 645, LTT 6942[9]
Database references
SIMBADThe star
b
Exoplanet Archivedata
ARICNSdata

Gliese 674 (GJ 674) is a small red dwarf star with an exoplanetary companion in the southern constellation of Ara. It is too faint to be visible to the naked eye, having an apparent visual magnitude of 9.38[2] and an absolute magnitude of 11.09.[2] The system is located at a distance of 14.85 light-years from the Sun based on parallax measurements,[1] but is drifting closer with a radial velocity of −2.9 km/s.[5] It is a candidate member of the 200 million year old Castor stream of co-moving stars.[10]

This is a low-mass M-type main-sequence star with a stellar classification of M3V.[3] The star is weakly active and show star spots on a regular basis. Even low activity red dwarfs can flare, and in 2018 this star was observed emitting a hot ultraviolet flare with a total energy of 5.6×1023 Joules and a duration of a few hours. GJ 674 is at an intermediate stage of spin-down with a rotation period of 33.4 days, suggesting an age of up to a few billion years.[11] It is smaller and less massive than the Sun, and is radiating just 1.6%[8] of the Sun's luminosity from its photosphere at an effective temperature of 3,404 K.[6]

  1. ^ a b c d e 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 Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Torres_et_al_2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Koen_et_al_2010 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference Pineda_et_al_2021 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference mnras452_3_2745 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Bonfils2007 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Caballero2010 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Christian_Schneider_et_al_2019 was invoked but never defined (see the help page).