Delta Reticuli

Delta Reticuli
Diagram showing star positions and boundaries of the Reticulum constellation and its surroundings
Location of δ Reticuli (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Reticulum
Right ascension 03h 58m 44.74945s
Declination −61° 24′ 00.6673″
Apparent magnitude (V) 4.60
Characteristics
Evolutionary stage asymptotic giant branch
Spectral type M2 III
U−B color index +2.02
B−V color index +1.61
Variable type Suspected
Astrometry
Radial velocity (Rv)−1.4±2.8 km/s
Proper motion (μ) RA: +9.80 mas/yr
Dec.: −14.30 mas/yr
Parallax (π)6.20±0.25 mas
Distance530 ± 20 ly
(161 ± 7 pc)
Absolute magnitude (MV)−1.47
Details
Radius56 R☉
Luminosity1,100 L☉
Temperature3,891 K
Other designations
δ Ret, CPD−61 290, FK5 1110, HD 25422, HIP 18597, HR 1247, SAO 248918
Database references
SIMBADdata

Delta Reticuli (Delta Ret, δ Reticuli, δ Ret) is a star in the southern constellation of Reticulum. It is visible to the naked eye, having an apparent visual magnitude of 4.60. The distance to this star, as estimated from its annual parallax shift of 6.20 mas, is roughly 530 light-years from the Sun.

This is an evolved red giant star on the asymptotic giant branch, having a stellar classification of M2 III. It has expanded to around 56 times the radius of the Sun and radiates 1,100 times the solar luminosity from its cool outer atmosphere at an effective temperature of 3,891 K.

Delta Reticuli is moving through the Milky Way at a speed of 13.3 km/s relative to the Sun. Its projected galactic orbit carries it between 22,700 and 30,400 light-years from the center of the galaxy.

References

  1. 1 2 3 4 5 6 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. 1 2 3 4 Feinstein, A. (1966), "Photoelectric observations of Southern late-type stars", The Information Bulletin for the Southern Hemisphere, 8: 30, Bibcode:1966IBSH....8...30F.
  3. 1 2 Eggen, O. J. (1992), "Asymptotic giant branch stars near the sun", The Astronomical Journal, 104: 275, Bibcode:1992AJ....104..275E, doi:10.1086/116239.
  4. 1 2 Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  5. ↑ Samus, N. N.; Durlevich, O. V.; et al. (2004), "Combined General Catalogue of Variable Stars (GCVS4.2)", VizieR On-line Data Catalog, Institute of Astronomy of Russian Academy of Sciences and Sternberg State Astronomical Institute of the Moscow State University, Bibcode:2004yCat.2250....0S.
  6. ↑ 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, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
  7. ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  8. 1 2 Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics, 367 (3rd ed.): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  9. 1 2 3 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
  10. ↑ "del Ret". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-02-14.{{cite web}}: CS1 maint: postscript (link)
  11. ↑ "Delta Reticuli (HIP 18597)". Archived from the original on 2014-04-14. Retrieved 2012-08-17.