HD 102365

HD 102365
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]
Distance30.40 ± 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]
Distance30.362 ± 0.010 ly
(9.309 ± 0.003 pc)
Details
A
Mass0.889[8] M☉
Radius0.96[8] R☉
Luminosity0.85[9] L☉
Surface gravity (log g)4.51[5] cgs
Temperature5,643[9] K
Metallicity [Fe/H]−0.28[9] dex
Rotational velocity (v sin i)0.5[10] km/s
Age4.5–5.7[11] Gyr
Other designations
CD−39°7301, GJ 442, HD 102365, HIP 57443, HR 4523, SAO 223020, G 66 Centauri, LHS 311, LTT 4373[12]
Database references
SIMBADA
B
ARICNSdata

HD 102365 (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.

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