119 Tauri
new.png) The sky position of 119 Tauri | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05h 32m 12.75251s[1] |
| Declination | +18° 35′ 39.2436″[1] |
| Apparent magnitude (V) | 4.33[2] (4.23-4.54[3]) |
| Characteristics | |
| Spectral type | M2Iab-Ib[3] |
| U−B color index | +2.23[2] |
| B−V color index | +2.08[2] |
| Variable type | SRc[3] |
| Astrometry | |
| Radial velocity (Rv) | +23.75[4] km/s |
| Proper motion (μ) | RA: 1.86[1] mas/yr Dec.: −4.48[1] mas/yr |
| Parallax (π) | 1.82 ± 0.26[1] mas |
| Distance | approx. 1,800 ly (approx. 550 pc) |
| Absolute magnitude (MV) | −5.20[5] |
| Details | |
| Mass | 8.0[6] M☉ |
| Radius | 601[6] R☉ |
| Luminosity | 43,000[6] L☉ |
| Surface gravity (log g) | -0.21[6] cgs |
| Temperature | 3,400[6] K |
| Metallicity | 0.0[6] |
| Other designations | |
| Database references | |
| SIMBAD | data |
119 Tauri (CE Tau) is a star in the constellation Taurus. It is one of the largest stars known, having a diameter about 600 times that of the Sun. CE Tau is close enough that its distance can be determined accurately by parallax and so the actual diameter can be determined directly from the angular diameter.
119 Tauri is a M-type red supergiant with a mean apparent magnitude of +4.32. It is approximately 1,800 light years from Earth. The star is classified as a semiregular variable star and its brightness varies from magnitude +4.23 to +4.54 with a period of 165 days.[3] With a colour index of +2.07, it is one of the reddest naked eye stars in the night sky.[2] CE Tauri lies 4.6 degrees off the ecliptic. This makes it a candidate for occultations by the Moon and (extremely rarely) by one of the bright planets. The star's angular diameter and a linear radius of 450 Solar radii have been measured in three colors by lunar occultation.[7] The diameter has also been measured directly by VLTI, leading to a measurement of the radius with a margin of error of 83 R☉.[6]
Notes
- 1 2 3 4 5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 3 4 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237: 0. Bibcode:2002yCat.2237....0D.
- 1 2 3 4 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S 1: 02025. Bibcode:2009yCat....102025S.
- ↑ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data". Astronomy and Astrophysics 430 (1): 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272.
- ↑ Wasatonic, R. & Guinan, E. F. (1998). "Variations of Luminosity, Radius, and Temperature of the Pulsating Red Supergiant CE Tauri". Information Bulletin on Variable Stars 4629: 1. Bibcode:1998IBVS.4629....1W.
- 1 2 3 4 5 6 7 Cruzalebes, P.; Jorissen, A.; Rabbia, Y.; Sacuto, S.; Chiavassa, A.; Pasquato, E.; Plez, B.; Eriksson, K.; Spang, A.; Chesneau, O. (2013). "Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER". Monthly Notices of the Royal Astronomical Society 434 (1): 437–450. arXiv:1306.3288. Bibcode:2013MNRAS.434..437C. doi:10.1093/mnras/stt1037.
- ↑ White, N. M. (1980). "The occultation of 119 Tauri and the effective temperatures of three M supergiants". The Astrophysical Journal 242: 646. Bibcode:1980ApJ...242..646W. doi:10.1086/158501.
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