GJ 1151
Red dwarf star / From Wikipedia, the free encyclopedia
GJ 1151 is a star located in the northern circumpolar constellation of Ursa Major at a distance of 26.2 light-years (8.0 parsecs) from the Sun. It has a reddish hue and is too faint to be visible to the naked eye with an apparent visual magnitude of 14.0[2] The star is moving closer with a radial velocity of −36 km/s,[5] and has a relatively large proper motion, traversing the celestial sphere at a rate of 1.815″·yr−1.[7]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Ursa Major |
Right ascension | 11h 50m 57.72053s[1] |
Declination | +48° 22′ 38.5612″[1] |
Apparent magnitude (V) | 14.008[2] |
Characteristics | |
Spectral type | dM4.5[2] |
B−V color index | 1.787[3] |
Astrometry | |
Radial velocity (Rv) | −36.13±0.26[1] km/s |
Proper motion (μ) | RA: -1545.069 mas/yr[1] Dec.: -962.724 mas/yr[1] |
Parallax (π) | 124.3378 ± 0.0549 mas[1] |
Distance | 26.23 ± 0.01 ly (8.043 ± 0.004 pc) |
Absolute magnitude (MV) | 14.482±0.022[2] |
Details | |
Mass | 0.1639±0.0093[4] M☉ |
Radius | 0.1781±0.0042[4] R☉ |
Luminosity (bolometric) | 0.003315±0.000018[4] L☉ |
Surface gravity (log g) | 5.09±0.09[4] cgs |
Temperature | 3,143±26[2] K |
Metallicity [Fe/H] | −0.12±0.10[4] dex |
Rotation | 140±10 d |
Rotational velocity (v sin i) | 2.0[5] km/s |
Age | 2.5[3] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Close
This is a small red dwarf star of spectral type dM4.5.[2] It is 2.5[3] billion years old and is spinning with a projected rotational velocity of 2.0 km/s.[5] The star has 15.4%[3] of the mass of the Sun and 19.0%[3] of the Sun's radius, with an effective temperature of 3,143 K.[2]