Gliese 625

Gliese 625
Observation data
Epoch J2000      Equinox J2000
Constellation Draco
Right ascension 16h 25m 24.62304s[1]
Declination +54° 18′ 14.7655″[1]
Apparent magnitude (V) 10.13[2]
Characteristics
Spectral type M1.5V[3]
B−V color index 1.591±0.027[2]
Astrometry
Radial velocity (Rv)−13.37±0.14[1] km/s
Proper motion (μ) RA: 432.230(19) mas/yr[1]
Dec.: −171.652(22) mas/yr[1]
Parallax (π)154.3503 ± 0.0161 mas[1]
Distance21.131 ± 0.002 ly
(6.4788 ± 0.0007 pc)
Absolute magnitude (MV)11.06[2]
Details
Mass0.240±0.013[4] M☉
Radius0.255±0.034[4] R☉
Luminosity0.01482±0.00022[5] L☉
Surface gravity (log g)4.94±0.06[6] cgs
Temperature3,557±9[7] K
Metallicity [Fe/H]−0.401±0.005[7] dex
Rotation77.8±5.5 d[6]
Rotational velocity (v sin i)2.2±0.7[7] km/s
Other designations
GJ 625, HIP 80459, AC +54 1646, G 202-48, G 226-7, G 225-62, LSPM J1625+5418, NLTT 42804, PLX 3740.03, TYC 3878-1193-1, 2MASS J16252459+5418148[8]
Database references
SIMBADdata

GJ 625 (AC 54 1646-56) is a small red dwarf star with an exoplanetary companion in the northern constellation of Draco. The system is located at a distance of 21.1 light-years from the Sun based on parallax,[1] but is drifting closer with a radial velocity of −13 km/s.[7] It is too faint to be visible to the naked eye, having an apparent visual magnitude of 10.13[2] and an absolute magnitude of 11.06.[2]

This is an M-type main-sequence star with a stellar classification of M1.5V.[3] It is spinning slowly with a rotation period of roughly 78 days, and has a low magnetic activity level.[6] The star has about a quarter of the mass and size of the Sun,[4] and the metal content is 40% the abundances in the Sun's atmosphere. It is radiating just 1.5% of the luminosity of the Sun from its photosphere at an effective temperature of 3,557 K.[7]

  1. ^ a b c d e f 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 Cite error: The named reference Alonso-Floriano_et_al_2015 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Khata_et_al_2020 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SchweitzerPassegger2019 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Suárez Mascareño2017 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference Fouqué_et_al_2018 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).