Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus |
Right ascension | 12h 24m 12.93679s [1] |
Declination | −38° 54′ 49.7344″ [1] |
Apparent magnitude (V) | 6.87±0.01 [2] |
Characteristics | |
Evolutionary stage | main sequence [1] |
Spectral type | A7/8 III [3] |
B−V color index | +0.28 [2] |
Astrometry | |
Proper motion (μ) |
RA: +0.085
mas/
yr
[1] Dec.: +0.966 mas/ yr [1] |
Parallax (π) | 12.5254 ± 0.0221 mas [1] |
Distance | 260.4 ± 0.5
ly (79.8 ± 0.1 pc) |
Absolute magnitude (MV) | +2.41 [4] |
Details [1] | |
Mass | 1.6 M☉ |
Radius | 1.9 R☉ |
Luminosity | 8.9 L☉ |
Surface gravity (log g) | 4.01 cgs |
Temperature | 7,261 K |
Metallicity [Fe/H] | −0.62 dex |
Age | 1.2 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 107914 is the primary component of a binary star system in the constellation Centaurus, with an estimated distance of 255.5 light-years (78.3 pc) [6] from the Solar System. It has a stellar classification of A7-8 III, making it a giant star.
Measurement of the proper motion of this system show that it has a low transverse velocity relative to the Sun. For this reason, it has been compared to the hypothetical " Nemesis" star since it may pass through the Oort cloud in the future. [6] The star is too far away to be a companion to the Sun. However, preliminary measurements of the H-alpha line in the star's spectrum show a radial velocity in the range from –13 to +3 km/s. (This result was obtained by M. Muterspaugh and M. Williamson at a robotic spectroscopic telescope in Arizona. [7]) Such values for the radial velocity are too small to produce a likely collision course with the Solar System. For example, if Vr = –10 km/s, then the distance from the Sun to HD 107914 at closest approach will be about 5.2 ly (1.6 pc).