Zeta Reticuli

ζ Reticuli
Location of ζ Reticuli (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Reticulum
ζ1 Ret
Right ascension 03h 17m 46.16331s[1]
Declination −62° 34′ 31.1541″[1]
Apparent magnitude (V) 5.52[2]
ζ2 Ret
Right ascension 03h 18m 12.81853s[3]
Declination −62° 30′ 22.9048″[3]
Apparent magnitude (V) 5.22[2]
Characteristics
Spectral type G3−5V + G2V[4]
U−B color index +0.08 / +0.01[2]
B−V color index +0.63 / +0.58[2]
R−I color index +0.34 / +0.34[4]
Astrometry
ζ1 Ret
Radial velocity (Rv)+12.21±0.17[1] km/s
Proper motion (μ) RA: +1,337.591[1] mas/yr
Dec.: +649.930[1] mas/yr
Parallax (π)83.0625 ± 0.0739 mas[1]
Distance39.27 ± 0.03 ly
(12.04 ± 0.01 pc)
Absolute magnitude (MV)5.11±0.01[5]
Absolute bolometric
magnitude (Mbol)		5.03±0.03[4]
ζ2 Ret
Radial velocity (Rv)+11.5[6] km/s
Proper motion (μ) RA: +1,331.151[7] mas/yr
Dec.: +648.523[7] mas/yr
Parallax (π)83.0122 ± 0.1888 mas[7]
Distance39.29 ± 0.09 ly
(12.05 ± 0.03 pc)
Absolute magnitude (MV)4.83[5]
Absolute bolometric
magnitude (Mbol)		4.79±0.03[4]
Details[8]
ζ1 Ret
Mass0.94 M☉
Radius0.90±0.03 R☉
Luminosity0.761[9] L☉
Surface gravity (log g)4.5±0.1 cgs
Temperature5,729±60 K
Metallicity [Fe/H]−0.25±0.06 dex
Rotational velocity (v sin i)2.2±0.8 km/s
Age1.5–3.0[10] Gyr
ζ2 Ret
Mass0.96 M☉
Radius0.98±0.03 R☉
Luminosity0.972[9] L☉
Surface gravity (log g)4.43±0.10 cgs
Temperature5,861±12[11] K
Metallicity [Fe/H]−0.26±0.03 dex
Rotational velocity (v sin i)1.74[12] km/s
Age1.5–3.0[10] Gyr
Other designations
ζ Reticuli, WDS J03182-6230
ζ1 Reticuli: ζ1 Ret, Zeta1 Ret, CPD−63°217, GJ 136, HD 20766, HIP 15330, HR 1006, SAO 248770, LFT 275, LHS 171, LTT 1573
ζ2 Reticuli: ζ2 Ret, Zeta2 Ret, CPD−62°265, GJ 138, HD 20807, HIP 15371, HR 1010, SAO 248774, LFT 276, LHS 172, LTT 1576
Database references
SIMBADζ1 Ret
ζ2 Ret

Zeta Reticuli, Latinized from ζ Reticuli, is a wide binary star system in the southern constellation of Reticulum. From the southern hemisphere the pair can be seen with the naked eye as a double star in very dark skies. Based upon parallax measurements, this system is located at a distance of about 39.3 light-years (12 parsecs) from Earth. Both stars are solar analogs that have characteristics similar to those of the Sun. They belong to the Zeta Herculis Moving Group of co-moving stars that share a common origin.

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