Delta3 Tauri
 
| |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 25m 29.38340s[1] |
| Declination | +17° 55′ 40.4579″[1] |
| Apparent magnitude (V) | +4.32 (4.35 + 8.37)[2] |
| Characteristics | |
| Spectral type | A2IV |
| Astrometry | |
| Proper motion (μ) | RA: +41.91[1] mas/yr Dec.: −34.54[1] mas/yr |
| Parallax (π) | 21.96 ± 0.51[1] mas |
| Distance | 149 ± 3 ly (46 ± 1 pc) |
| Details | |
| Mass | 2.27±0.23[3] M☉ |
| Luminosity | 1.47±0.05[3] L☉ |
| Surface gravity (log g) | 3.95[3] cgs |
| Temperature | 9,025[3] K |
| Rotational velocity (v sin i) | 11.3[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Delta3 Tauri (δ3 Tauri) is a binary star[2] system in the zodiac constellation of Taurus. Based upon an annual parallax shift of 21.96 mas as seen from Earth,[1] it is located roughly 149 light years distant from the Sun. It is visible to the naked eye with a combined apparent visual magnitude of +4.32.[2] δ3 Tauri is separated from δ1 Tauri by 0.72° on the sky. This star also has the traditional latin name Cleeia,[5][6] from the Greek Kleeia (transliteration of Κλεεια),[7] who was one of the Hyades sisters. It is considered a member of the Hyades cluster.[3]
The magnitude 4.35[2] primary, component A, appears to be an A-type subgiant star with a stellar classification of A2 IV. It is a candidate blue straggler and shows characteristics of an Am star. Abt (1985) gave it a classification of A2kA3hA5m, indicating that the spectrum displays the K-line of an A2 star, the hydrogen lines of an A3 star and the metal lines of an A5 star. It is deficient in scandium but has enhanced iron peak and heavy elements.[3] Although suspect of variability in the past,[8] Delta3 Tauri A was subsequently determined to be photometrically constant.[9]
The companion, component B, is a magnitude 8.37[2] star at an angular separation of 1.80 arc seconds along a position angle of 341°, as of 2010. At 77 arcseconds away (as of 2006) is a magnitude 11.12 visual companion, designated component C.[10]
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 5 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 3 4 5 6 7 Gebran, M.; Vick, M.; Monier, R.; Fossati, L. (November 2010), "Chemical composition of A and F dwarfs members of the Hyades open cluster", Astronomy and Astrophysics, 523: 13, Bibcode:2010A&A...523A..71G, doi:10.1051/0004-6361/200913273, A71.
- ↑ "del03 Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-08-07.
- ↑ Falkner, David E. (2011), The Mythology of the Night Sky: An Amateur Astronomer's Guide to the Ancient Greek and Roman Legends, The Patrick Moore Practical Astronomy Series, Springer Science & Business Media, p. 36, ISBN 1461401372.
- ↑ Bagnall, Philip M. (2012), The Star Atlas Companion: What you need to know about the Constellations, Springer Praxis Books, Springer Science & Business Media, p. 422, ISBN 146140830X
- ↑ "Family of the Hyades", Theoi Greek Mythology, retrieved 2017-08-08.
- ↑ Kholopov, P. N.; et al. (February 1981), "65th Name-List of Variable Stars", Information Bulletin on Variable Stars, 1921: 1, Bibcode:1981IBVS.1921....1K.
- ↑ Adelman, S. J. (June 1997), "On the possible variability of metallic-line and Mercury-Manganese stars", A & A Supplement series, 123: 445−447, Bibcode:1997A&AS..123..445A, doi:10.1051/aas:1997167.
- ↑ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122: 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920.