V1094 Tauri
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Taurus |
| A | |
| Right ascension | 04h 12m 03.59s[1] |
| Declination | +21° 56′ 50.6″[1] |
| Apparent magnitude (V) | 8.95 to 9.43[2] |
| B | |
| Right ascension | 04h 12m 05.10s[3] |
| Declination | +21° 56′ 49.7″[3] |
| Apparent magnitude (V) | 14.24[4] |
| Characteristics | |
| A | |
| Spectral type | G0 + G3[5] |
| Variable type | Algol[2] |
| Astrometry | |
| A | |
| Proper motion (μ) | RA: +89.201[1] mas/yr Dec.: −84.886[1] mas/yr |
| Parallax (π) | 8.2523±0.0203 mas[1] |
| Distance | 395.2 ± 1.0 ly (121.2 ± 0.3 pc) |
| B | |
| Radial velocity (Rv) | +5.67±2.98[3] km/s |
| Proper motion (μ) | RA: +88.757[3] mas/yr Dec.: −84.665[3] mas/yr |
| Parallax (π) | 8.2126±0.0166 mas[3] |
| Distance | 397.1 ± 0.8 ly (121.8 ± 0.2 pc) |
| Orbit[6] | |
| Primary | eclipsing primary |
| Name | eclipsing secondary |
| Period (P) | 8.988 d |
| Semi-major axis (a) | 0.091—0.092 AU |
| Eccentricity (e) | 0.2697 |
| Inclination (i) | 90° |
| Semi-amplitude (K1) (primary) | 65.30 km/s |
| Semi-amplitude (K2) (secondary) | 70.98 km/s |
| Details[5] | |
| Eclipsing primary | |
| Mass | 1.0965±0.0040 M☉ |
| Radius | 1.4109±0.0058 R☉ |
| Temperature | 5,850±100 K |
| Metallicity | −0.09±0.11 dex |
| Age | ≈6 Gyr |
| Eclipsing secondary | |
| Mass | 1.0120±0.0028 M☉ |
| Radius | 1.1063±0.0066 R☉ |
| Temperature | 5,700±100 K |
| Metallicity | −0.09±0.11 dex |
| Age | ≈6 Gyr |
| B | |
| Mass | 0.616[7] M☉ |
| Radius | 0.636[7] R☉ |
| Luminosity | 0.088[7] L☉ |
| Surface gravity (log g) | 4.62[7] cgs |
| Temperature | 3,944[7] K |
| Other designations | |
| V1094 Tau, AG+21 394, BD+21 605, HD 284195, SAO 76494, PPM 93323, CCDM J04121+2157, WDS J04121+2157, TYC 1263-642-1, GSC 01263-00642, 2MASS J04120358+2156508 | |
| Database references | |
| SIMBAD | data |
| B | |
V1094 Tauri is a system of at least three stars in the constellation of Taurus. Two stars are resolved 21″ apart; the brighter is an eclipsing binary.[8] In 2015, the parameters for the eclipsing pair were precisely measured.[5] Radial velocity data also revealed apsidal motion with a period of 14,500±3,700 years, which may indicate a third star.[9]
The star system was included in a 2003 study that featured GK Draconis and V1094 Tauri. The study suggested a mass of 1.10 M☉ for the primary star and a mass of 1.01 M☉ for the secondary.[6] The two stars orbit each other at a distance of around 0.091 to 0.092 astronomical units and have an orbital period of around 9 days.
References
[edit]- 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- 1 2 Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085.
- 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ↑ Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)". Vizier Online Data Catalog. Bibcode:2012yCat.1322....0Z.
- 1 2 3 Maxted, P. F. L.; Hutcheon, R. J.; Torres, G.; Lacy, C. H. S.; Southworth, J.; Smalley, B.; Pavlovski, K.; Marschall, L. A.; Clausen, J. V. (2015). "Precise mass and radius measurements for the components of the bright solar-type eclipsing binary star V1094 Tauri". Astronomy and Astrophysics. 578: A25. arXiv:1503.04435. Bibcode:2015A&A...578A..25M. doi:10.1051/0004-6361/201525873.
- 1 2 Griffin, R. F.; Boffin, H. M. J. (2003). "Spectroscopic binary orbits from photoelectric radial velocities. Paper 171: HD 152028 and HDE 284195 (GK Dra and V1094 Tau)". The Observatory. 123: 203. arXiv:astro-ph/0306107. Bibcode:2003Obs...123..203G.
- 1 2 3 4 5 Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
- ↑ "DEBCat: John Southworth's catalogue of well-studied detached eclipsing binaries". www.astro.keele.ac.uk. Retrieved 2026-05-26.
- ↑ Wolf, M.; Claret, A.; Kotková, L.; Kučáková, H.; Kocián, R.; Brát, L.; Svoboda, P.; Šmelcer, L. (2010). "Relativistic apsidal motion in eccentric eclipsing binaries". Astronomy and Astrophysics. 509: A18. Bibcode:2010A&A...509A..18W. doi:10.1051/0004-6361/200911671.
