Iota Reticuli
| |
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
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Constellation | Reticulum |
Right ascension | 04h 01m 18.15162s[1] |
Declination | −61° 04′ 43.7559″[1] |
Apparent magnitude (V) | +4.97[2] |
Characteristics | |
Spectral type | K4 III[3] |
U−B color index | +1.70[2] |
B−V color index | +1.42[2] |
Astrometry | |
Radial velocity (Rv) | ±0.8 +60.5[4] km/s |
Proper motion (μ) | RA: +66.79[1] mas/yr Dec.: +94.80[1] mas/yr |
Parallax (π) | 10.22 ± 0.16[1] mas |
Distance | 319 ± 5 ly (98 ± 2 pc) |
Details | |
Luminosity | 59[5] L☉ |
Temperature | 7,358[5] K |
Other designations | |
Database references | |
SIMBAD | data |
Iota Reticuli (ι Reticuli) is a solitary,[7] orange-hued star in the southern constellation of Reticulum. It is faintly visible to the naked eye, having a combined apparent visual magnitude of +4.97.[2] Based upon an annual parallax shift of 10.22 mas as seen from Earth,[1] it is located around 319 light years from the Sun. This is an evolved K-type giant star with a stellar classification of K4 III.[3]
Iota Reticuli is moving through the Galaxy at a speed of 80.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 12,300 and 25,100 light years from the center of the Galaxy.[8]
Iota Reticuli came closest to the Sun 883,000 years ago when it had brightened to magnitude 4.08 from a distance of 212 light years.[8]
References
- 1 2 3 4 5 6 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357.
- 1 2 3 4 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
- 1 2 Houk, Nancy; Cowley, A. P. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
- ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, Bibcode:2012A&A...546A..61D, arXiv:1208.3048 , doi:10.1051/0004-6361/201219219, A61.
- 1 2 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, Bibcode:2012MNRAS.427..343M, arXiv:1208.2037 , doi:10.1111/j.1365-2966.2012.21873.x.
- ↑ "iot Ret". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-07-14.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
- 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended Hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971 . doi:10.1134/S1063773712050015.