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Kappa Reticuli
Star system in the constellation Reticulum / From Wikipedia, the free encyclopedia
Kappa Reticuli (κ Reticuli) is a binary star[3] system in the southern constellation of Reticulum. It is visible to the naked eye, having a combined apparent visual magnitude of +4.71.[2] Based upon an annual parallax shift of 46.12 mas as seen from Earth,[1] it is located 71 light-years from the Sun. Based upon its space velocity components, this star is a member of the Hyades supercluster of stars that share a common motion through space.[14]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Reticulum |
Right ascension | 03h 29m 22.67724s[1] |
Declination | −62° 56′ 15.0991″[1] |
Apparent magnitude (V) | +4.71[2] + 10.7[3] |
Characteristics | |
Spectral type | F3 V[4] or F3 IV/V[5] + M1[6] |
U−B color index | −0.04[2] |
B−V color index | +0.39[2] |
Astrometry | |
Radial velocity (Rv) | +12.5±0.4[7] km/s |
Proper motion (μ) | RA: +382.84[1] mas/yr Dec.: +373.05[1] mas/yr |
Parallax (π) | 46.12 ± 0.13 mas[1] |
Distance | 70.7 ± 0.2 ly (21.68 ± 0.06 pc) |
Absolute magnitude (MV) | +2.98[8] |
Details | |
κ Ret A | |
Mass | 1.32[9] M☉ |
Radius | 1.1[10] R☉ |
Surface gravity (log g) | 4.31[9] cgs |
Temperature | 6,796±231[9] K |
Metallicity [Fe/H] | −0.07[11] dex |
Rotational velocity (v sin i) | 13.5±0.7[12] km/s |
Age | 848[9] Myr |
κ Ret B | |
Mass | 0.54[6] M☉ |
Radius | 0.50[6] R☉ |
Luminosity | 0.043[6] L☉ |
Temperature | 3,733[6] K |
Other designations | |
Database references | |
SIMBAD | data |
Houk and Cowley (1978) catalogued the yellow-hued[15] primary, component A, with a stellar classification of F3 IV/V,[5] indicating this is an F-type star that showing mixed traits of a main-sequence and a more evolved subgiant star. Later, Grey et al. (2006) listed a class of F3 V,[4] suggesting it is an F-type main-sequence star. It is emitting a statistically significant amount of infrared excess, suggesting the presence of an orbiting debris disk.[16] The secondary, component B, is an orange-hued[15] star with a visual magnitude of 10.4 at an angular separation of 54 arcseconds from the primary.[3]