Zeta Reticuli
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 stars that share a common origin.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Reticulum |
| ζ1 Ret | |
| Right ascension | 03h 17m 46.16331s |
| Declination | −62° 34′ 31.1541″ |
| Apparent magnitude (V) | 5.52 |
| ζ2 Ret | |
| Right ascension | 03h 18m 12.81853s |
| Declination | −62° 30′ 22.9048″ |
| Apparent magnitude (V) | 5.22 |
| Characteristics | |
| Spectral type | G3−5V + G2V |
| U−B color index | +0.08 / +0.01 |
| B−V color index | +0.63 / +0.58 |
| R−I color index | +0.34 / +0.34 |
| Astrometry | |
| ζ1 Ret | |
| Radial velocity (Rv) | +12.21±0.17 km/s |
| Proper motion (μ) | RA: +1,337.591 mas/yr Dec.: +649.930 mas/yr |
| Parallax (π) | 83.0625 ± 0.0739 mas |
| Distance | 39.27 ± 0.03 ly (12.04 ± 0.01 pc) |
| Absolute magnitude (MV) | 5.11±0.01 |
| Absolute bolometric magnitude (Mbol) | 5.03±0.03 |
| ζ2 Ret | |
| Radial velocity (Rv) | +11.5 km/s |
| Proper motion (μ) | RA: +1,331.151 mas/yr Dec.: +648.523 mas/yr |
| Parallax (π) | 83.0122 ± 0.1888 mas |
| Distance | 39.29 ± 0.09 ly (12.05 ± 0.03 pc) |
| Absolute magnitude (MV) | 4.83 |
| Absolute bolometric magnitude (Mbol) | 4.79±0.03 |
| Details | |
| ζ1 Ret | |
| Mass | 0.958 M☉ |
| Radius | 0.92 R☉ |
| Luminosity | 0.761 L☉ |
| Surface gravity (log g) | 4.54±0.03 cgs |
| Temperature | 5,720±13 K |
| Metallicity [Fe/H] | −0.206 dex |
| Rotational velocity (v sin i) | 1.98 km/s |
| Age | 1.5–3.0 Gyr |
| ζ2 Ret | |
| Mass | 0.985 M☉ |
| Radius | 0.99 R☉ |
| Luminosity | 0.972 L☉ |
| Surface gravity (log g) | 4.53±0.02 cgs |
| Temperature | 5,861±12 K |
| Metallicity [Fe/H] | −0.215 dex |
| Rotational velocity (v sin i) | 1.74 km/s |
| Age | 1.5–3.0 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 | |
| SIMBAD | ζ1 Ret |
| ζ2 Ret | |
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