U Andromedae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 01h 15m 29.69623s[1] |
| Declination | +40° 43′ 08.39324″[1] |
| Apparent magnitude (V) | 9.0 to 15.0[2] |
| Characteristics | |
| Spectral type | M6e[2] |
| Variable type | Mira[2] |
| Astrometry | |
| Radial velocity (Rv) | -4.0 ± 5[3] km/s |
| Proper motion (μ) | RA: 11.416 ± 0.321 [1] mas/yr Dec.: -8.392 ± 0.297 [1] mas/yr |
| Parallax (π) | 1.4745 ± 0.1511[1] mas |
| Distance | approx. 2,200 ly (approx. 680 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
U Andromedae is a variable star in the constellation of Andromeda. It is a star of spectral type M6e, then it is classified as a Mira variable, and varies from an apparent visual magnitude of 9.0 at maximum brightness to a magnitude of 15.0 at minimum brightness, with a period of approximately 347 days.[2] It was first observed to be variable by Thomas D. Anderson during 1894 and 1895.[4][5]
References
- 1 2 3 4 5 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
- 1 2 3 4 U And, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250.
- 1 2 "U And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 8, 2018.
- ↑ New variable star in Andromeda, T. D. Anderson, Astronomische Nachrichten 139 (1896), p. 117–118, Bibcode: 1896AN....139Q.117A.
- ↑ Third catalogue of variable stars, S. C. Chandler, Astronomical Journal 16, #19 (issue #379, July 8, 1896), pp. 145–172, Bibcode: 1896AJ.....16..145C, doi:10.1086/102484.
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