Gliese 784

Gliese 784
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Telescopium
Right ascension 20h 13m 53.396s[1]
Declination −45° 09′ 50.47″[1]
Apparent magnitude (V) 7.96[2]
Characteristics
Spectral type M0V[2]
B−V color index 1.45[2]
Astrometry
Radial velocity (Rv)−33.5±0.5[1] km/s
Proper motion (μ) RA: 778.331 mas/yr[1]
Dec.: -159.939 mas/yr[1]
Parallax (π)162.2171 ± 0.0225 mas[1]
Distance20.106 ± 0.003 ly
(6.1646 ± 0.0009 pc)
Absolute magnitude (MV)9.01[3]
Details
Mass0.58[4] M☉
Radius0.58[5] R☉
Luminosity0.06[5] L☉
Temperature3,754±92[6] K
Metallicity [Fe/H]−0.07±0.06[6] dex
Rotation48±12[7]
Rotational velocity (v sin i)1.0[2] km/s
Age0.85±0.4[8] Gyr
Other designations
CD−45 13677, HD 191849, HIP 99701, SAO 230110, PPM 325963, Ci 20 1196, LFT 1532, LHS 3531, LPM 730, LTT 7999, NLTT 48880, PLX 4794, PM 20103-4519, TYC 8392-2673-1, 2MASS J20135335-4509506[9]
Database references
SIMBADdata
Gliese 784 is located in the constellation Telescopium
Gliese 784 is located in the constellation Telescopium
Gliese 784
Location of Gliese 784 in the constellation Telescopium

Gliese 784 is a single[8] red dwarf star located in the southern constellation of Telescopium that may host an exoplanetary companion. The star was catalogued in 1900, when it was included in the Cordoba Durchmusterung (CD) by John M. Thome with the designation CD−45 13677.[10] It is too faint to be viewed with the naked eye, having an apparent visual magnitude of 7.96.[2] Gliese 784 is located at a distance of 20.1 light-years from the Sun as determined from parallax measurements, and is drifting closer with a radial velocity of −33.5 km/s.[1] The system is predicted to come as close as 11.4 light-years in ~121,700 years time.[11]

This is a small M-type main-sequence star with a stellar classification of M0V.[2] It is much younger than Sun at 0.85±0.4 billion years.[8] Despite this, it appears to be rotating slowly with a period of roughly 48 days.[7] The star has 58% of the mass and 58% of the radius of the Sun. It is radiating just 6%[5] of the luminosity of the Sun from its photosphere at an effective temperature of 3,754 K.[6]

  1. ^ a b c d e f Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Torres_et_al_2006 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference RECONS was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Gáspár_et_al_2016 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Hojjatpanah_et_al_2019 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Byrne_Doyle_1989 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Brems2019 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 Thome1900 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Bailer_et_al_2018 was invoked but never defined (see the help page).