Location of ι Tauri (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05 03 05.74725 |
| Declination | 21° 35′ 23.8627″ |
| Apparent magnitude (V) | 4.62 |
| Characteristics | |
| Spectral type | A7 V |
| U−B color index | +0.15 |
| B−V color index | +0.16 |
| Astrometry | |
| Radial velocity (Rv) | +38.30 km/s |
| Proper motion (μ) | RA: +68.88 mas/yr Dec.: -41.06 mas/yr |
| Parallax (π) | 18.88 ± 0.30 mas |
| Distance | 173 ± 3 ly (53.0 ± 0.8 pc) |
| Absolute magnitude (MV) | 1.00 |
| Details | |
| Mass | 2.22 M☉ |
| Radius | 2.6 R☉ |
| Luminosity | 36 L☉ |
| Surface gravity (log g) | 3.97 cgs |
| Temperature | 8,054 K |
| Metallicity | +0.15 dex |
| Rotational velocity (v sin i) | 131 km/s |
| Age | 717 Myr |
| Other designations | |
| ι Tau, 102 Tauri, BD+21° 751, FK5 184, GC 6158, HD 32301, HIP 23497, HR 1620, SAO 76920, WDS J05031+2135AB, GSC 01293-02747 | |
| Database references | |
| SIMBAD | data |
Iota Tauri, Latinized from ι Tauri, is a white-hued star in the zodiac constellation Taurus and an outlying member of the Hyades star cluster. It is visible to the naked eye with an apparent visual magnitude of 4.62, and is located at an estimated distance of about 173 light years based upon parallax measurements. The star is moving away from the Sun with a radial velocity of +38 km/s.
This has been reported as a double star with two components at separation 0.1", both of type A7V and magnitude 5.4. The combined spectrum matches a stellar classification of A7 V, which would normally indicate an A-type main-sequence star that is generating energy through hydrogen fusion at its core. It has an estimated age of 717 million years.
References
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- ^ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789. Vizier catalog entry
- Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. Vizier catalog entry
- ^ David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. S2CID 33401607. Vizier catalog entry
- Varenne, O.; Monier, R. (November 1999), "Chemical abundances of A and F-type stars: the Hyades open cluster", Astronomy and Astrophysics, 351: 247–266, Bibcode:1999A&A...351..247V.
- Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry
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