Observation data
Epoch J2000.0 Equinox J2000.0
Constellation Reticulum
Zeta1 Reticuli
Right ascension 03h 17m 46.2s
Declination -62° 34′ 31″
Apparent magnitude (V) 5.54
Zeta2 Reticuli
Right ascension 03h 18m 12.8s
Declination -62° 30′ 22.9″
Apparent magnitude (V) 5.24
Characteristics
Spectral type G2.5 V / G1 V
U-B color index 0.07 / 0.01
B-V color index 0.63 / 0.59
Astrometry
Radial velocity (Rv) +12.2 km/s
Proper motion (μ) RA: 1,337.73 / 1,331.01 mas/yr
Dec.: 648.84 / 646.97 mas/yr
Parallax (π) 82.51 / 82.79 ± 0.54 / 0.53 mas
Distance 39.51 / 39.38 ly
(12.12 / 12.08 pc)
Absolute magnitude (MV) 5.12 / 4.83
Details
Zeta1 Reticuli
Mass 0.93 M☉
Radius 0.91 R☉
Luminosity 0.79 L☉
Temperature 5720 K
Metallicity 0.6
Age 8 × 109 years
Zeta2 Reticuli
Mass 0.99 M☉
Radius 0.99 R☉
Luminosity 1.02 L☉
Temperature 5840 K
Metallicity 0.6
Age 8 × 109 years
Other designations
Zeta1 Reticuli
CD -63°217, GCTP 701.00, Gl 136, HD 20766, HIP 15330, HR 1066, LFT 275, LHS 171, LTT 1573, SAO 248770
Zeta2 Reticuli
CD -62°265, GCTP 705.00, Gl 138, HD 20807, HIP 15371, HR 1010, LFT 276, LHS 172, LTT 1576, SAO 248774
[ 本帖最后由 deepgreen 于 2008-11-24 14:55 编辑 ] |