Zeta-1 Reticuli, a yellow main-sequence star in Reticulum
Zeta-1 Reticuli is a yellow main-sequence star in the constellation Reticulum. At 39 light years away, it shines at an apparent visual magnitude of 5.53.
Zeta-1 Reticuli (HIP 15330)
Zeta-1 Reticuli is a yellow main-sequence star in the constellation Reticulum. At 39 light years away, it shines at an apparent visual magnitude of 5.53. Zeta-1 Reticuli is the secondary component of a multiple-star system. The star's age is estimated to be 200 million years but is certainly no greater than 7.1 billion years. The iron abundance of Zeta-1 Reticuli is -0.22 (60.3% of the Sun). It is moving through the Galaxy at a speed of 85.6 km/s relative to the Sun.
Sky position: RA 3h 17.7m, Dec -62° 34.8'
Common designations: Zeta-1 Reticuli, HIP 15330, HD 20766, Gliese 136
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Galactic Orbit of
Zeta-1 Reticuli
(compared to the
Sun)
E
ccentricity: 35.4% vs. 16.0%Angle φ : -140.1°vs. 26.0°
Semi-major axis : 6,164 pc vs. 8,686 pc
Semi-minor axis: 5,766 pc vs. 8,574 pc
Focus-to-center
: 2,179 pcvs. 1,388 pcSemilatus rectum : 5,393 pc vs. 8,464 pc
Perigalacticon: 3,985 pc vs. 7,297 pc
Apogalacticon
: 8,343 pcvs. 10,074 pcSome Tabulated XHIP Data for Zeta-1 Reticuli
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 49.43528835° ±0.18 mas | 1,338.40 ±1.10 mas/yr. |
| Declination: | -62.57689909° ±0.18 mas | 650.30 ±1.10 mas/yr. |
| Galactic Longitude: | 279.10099582° | -1,343.99 mas/yr. |
| Galactic Latitude: | -47.21565504° | 638.66 mas/yr. |
Parallax: 83.28 ± 0.20 mas
Spectrography
Spectral Type: G4V 2006A&A...460..695T.
Radial Velocity: 12.30 ±0.58 km/s [A rating] 2005ApJS..159..141V.
Iron Abundance [Fe/H]:
-0.22 ±0.01 dex
2011A&A...530A.138C, 2007A&A...465..271R, 2006MNRAS.370..163B, 2005ApJS..161..444T, 2005ApJS..159..141V, 2004A&A...420..183A, 2004A&A...415.1153S, 2001A&A...373.1019S, 1994A&A...287..191P, 1986A&A...160..264F, 1981A&A...100...97G.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 6.17 | 5.77 |
| V | 5.53 | 5.13 |
| R | ||
| I | 4.81 | 4.41 |
| J | 4.46 | 4.06 |
| H | 4.04 | 3.64 |
| K | 3.99 | 3.60 |
B-V: +0.64 V-I: +0.72
Derivations
Heliocentric distance: 12.01 pc (0.2% margin of error)
Galactocentric distance: 7,399 pc
Transverse velocity: 84.7 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 1.3 pc | -8.1 pc | -8.8 pc |
| Velocity (U, V, W) | -70.0 km/s | -46.7 km/s | 15.7 km/s |