HD 102365
Binary star system in the constellation Centaurus / From Wikipedia, the free encyclopedia
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HD 102345 (66 G. Centauri) is a binary star system that is located in the northeastern part of the Centaurus constellation, at a distance of about 30.4 light-years (9.3 parsecs) from the Solar System. The larger member of the system is a G-type star that is smaller than the Sun but of similar mass. It has a common proper motion companion that was discovered by W. J. Luyten in 1960.[6] This M-type star appears to be in a wide orbit around the primary at a current separation of about 211 astronomical units (AU),[6] (or 211 times the separation of the Earth from the Sun). By comparison, Neptune orbits at an average distance of 30 AU.
Quick Facts Observation data Epoch J2000 Equinox J2000, Apparent magnitude (V) ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Centaurus |
HD 102365 A | |
Right ascension | 11h 46m 31.07253s[1] |
Declination | −40° 30′ 01.2859″[1] |
Apparent magnitude (V) | 4.88[2] |
HD 102365 B | |
Right ascension | 11h 46m 32.68988s[3] |
Declination | −40° 29′ 47.6048″[3] |
Apparent magnitude (V) | 15[4] |
Characteristics | |
Spectral type | G2V[5] + M4V[6] |
U−B color index | 0.10[2] |
B−V color index | 0.67[2] |
Astrometry | |
HD 102365 A | |
Radial velocity (Rv) | 16.94±0.12[1] km/s |
Proper motion (μ) | RA: −1530.971 mas/yr[1] Dec.: +403.287 mas/yr[1] |
Parallax (π) | 107.3024 ± 0.0873 mas[1] |
Distance | 30.40 ± 0.02 ly (9.319 ± 0.008 pc) |
Absolute magnitude (MV) | 5.07[7] |
HD 102365 B | |
Radial velocity (Rv) | 17.23±0.27[3] km/s |
Proper motion (μ) | RA: −1534.679 mas/yr[3] Dec.: +381.396 mas/yr[3] |
Parallax (π) | 107.4237 ± 0.0351 mas[3] |
Distance | 30.362 ± 0.010 ly (9.309 ± 0.003 pc) |
Details | |
A | |
Mass | 0.889[8] M☉ |
Radius | 0.96[8] R☉ |
Luminosity | 0.85[9] L☉ |
Surface gravity (log g) | 4.51[5] cgs |
Temperature | 5,643[9] K |
Metallicity [Fe/H] | −0.28[9] dex |
Rotational velocity (v sin i) | 0.5[10] km/s |
Age | 4.5–5.7[11] Gyr |
Other designations | |
Database references | |
SIMBAD | A |
B | |
ARICNS | data |
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