Zeta-2 Reticuli, a yellow main-sequence star in Reticulum
Zeta-2 Reticuli is a yellow main-sequence star in the constellation Reticulum. At 39 light years away, it shines at an apparent visual magnitude of 5.24.
Zeta-2 Reticuli (HIP 15371)
Zeta-2 Reticuli is a yellow main-sequence star in the constellation Reticulum. At 39 light years away, it shines at an apparent visual magnitude of 5.24. Zeta-2 Reticuli is the primary component of a multiple-star system. The star's age is estimated to be 3 billion years but is certainly no greater than 7.1 billion years. The iron abundance of Zeta-2 Reticuli is -0.22 (60.3% of the Sun). It is moving through the Galaxy at a speed of 85.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 13,100 and 27,200 light years from the center of the Galaxy. Zeta-2 Reticuli has no confirmed planets to date (early 2012), but does have a circumstellar debris disk.
Sky position: RA 3h 18.2m, Dec -62° 30.6'
Common designations: Zeta-2 Reticuli, HIP 15371, HD 20807, Gliese 138
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Brightest stars in Reticulum:
(list all)
| Rank | Mag. | Star |
| 1 | 3.33 | Alpha Reticuli |
| 2 | 3.84 | Beta Reticuli |
| 3 | 4.44 | Epsilon Reticuli |
| 4 | 4.48 | Gamma Reticuli |
| 5 | 4.56 | Delta Reticuli |
| 6 | 4.71 | Kappa Reticuli |
| 7 | 4.97 | Iota Reticuli |
8
| 5.24
) Zeta-2 Reticuli
| Rank | Mag. | Star |
| 9 | 5.24 | Eta Reticuli |
| 10 | 5.45 | HR 1340 |
| 11 | 5.53 | Zeta-1 Reticuli |
| 12 | 5.74 | HR 1435 |
| 13 | 5.79 | HR 1475 |
| 14 | 5.81 | HR 1092 |
| 15 | 5.88 | Theta Reticuli |
| 16 | 5.94 | HR 1416 |
| 17 | 6.03 | HR 1014 |
Galactic Orbit of Zeta-2 Reticuli
(compared to the Sun)
E
ccentricity: 34.9% vs. 16.0%Angle φ : -139.5°vs. 26.0°
Semi-major axis : 6,189 pc vs. 8,686 pc
Semi-minor axis: 5,799 pc vs. 8,574 pc
Focus-to-center
: 2,162 pcvs. 1,388 pcSemilatus rectum : 5,434 pc vs. 8,464 pc
Perigalacticon: 4,027 pc vs. 7,297 pc
Apogalacticon
: 8,352 pcvs. 10,074 pcSome Tabulated XHIP Data for Zeta-2 Reticuli
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 49.54640433° ±0.17 mas | 1,330.74 ±0.21 mas/yr. |
| Declination: | -62.50793544° ±0.16 mas | 647.11 ±0.19 mas/yr. |
| Galactic Longitude: | 278.97458332° | -1,334.59 mas/yr. |
| Galactic Latitude: | -47.21859882° | 639.14 mas/yr. |
Parallax: 83.11 ± 0.19 mas
Spectrography
Spectral Type: G0V 2006AJ....132..161G.
Radial Velocity: 11.60 ±0.50 km/s [A rating] 2005ApJS..159..141V.
Iron Abundance [Fe/H]:
-0.22 ±0.01 dex
2011A&A...530A.138C, 2008A&A...487..373S, 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, 2000A&A...363..692T, 1996A&A...314..191G, 1994A&A...291..895A, 1994A&A...287..191P, 1993A&A...275..101E, 1986A&A...160..264F, 1981A&A...100...97G.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 5.84 | 5.44 |
| V | 5.24 | 4.84 |
| R | ||
| I | 4.57 | 4.17 |
| J | 4.27 | 3.87 |
| H | 3.87 | 3.47 |
| K | 3.86 | 3.46 |
B-V: +0.60 V-I: +0.67
Derivations
Heliocentric distance: 12.03 pc (0.2% margin of error)
Galactocentric distance: 7,399 pc
Transverse velocity: 84.4 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) | -69.8 km/s | -46.1 km/s | 16.2 km/s |