Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pisces |
Right ascension | 23h 49m 12.52508s [2] |
Declination | 02° 24′ 04.4055″ [2] |
Apparent magnitude (V) | 8.93 - 9.03 [3] |
Characteristics | |
Spectral type | M1V Fe-1 [4] |
Variable type | BY Dra [3] |
Astrometry | |
Radial velocity (Rv) | −71.37±0.12 [2] km/s |
Proper motion (μ) | RA: +992.720 mas/yr [2] Dec.: −968.806 mas/yr [2] |
Parallax (π) | 169.2163±0.0281 mas [2] |
Distance | 19.275 ± 0.003 ly (5.9096 ± 0.0010 pc) |
Absolute magnitude (MV) | +10.1 [5] |
Details | |
Mass | 0.37 [6] M☉ |
Radius | 0.409±0.023 [7] R☉ |
Luminosity (bolometric) | 0.0253±0.0006 [7] L☉ |
Surface gravity (log g) | 4.86 [8] cgs |
Temperature | 3,600±100 [7] K |
Metallicity [Fe/H] | −0.51±0.05 [9] dex |
Rotation | 50.83±0.35 [10] days |
Rotational velocity (v sin i) | 2.25 [11] km/s |
Other designations | |
BR Piscium, BD+01°4774, GJ 908 [12] , HIP 117473 [13] , SAO 128397, PPM 174453, G 29-68, G 31-6, LHS 550 [14] , LTT 17014, PLX 5763 [15] , TYC 586-610-1 [16] , GSC 00586-00610, IRAS 23466+0207, 2MASS J23491255+0224037, Lalande 46650 | |
Database references | |
SIMBAD | data |
Location of Gliese 908 in the constellation Pisces |
Gliese 908 is a red dwarf star, located in constellation Pisces at 19.3 light-years from Earth. It is a BY Draconis variable star with a variable star designation of BR Piscium. Its apparent magnitude varies between magnitude 8.93 and magnitude 9.03 as a result of starspots and varying chromospheric activity.
The variability of Gliese 908 was confirmed in 1994, although no period could be detected in its brightness changes. [17] It was entered into the General Catalogue of Variable Stars in 1997. [18]
Gliese 908 is a cool main sequence star, a red dwarf, with a spectral class of M1V Fe-1. The suffix indicates a noticeable deficiency in heavy elements. [4]