V473 Lyrae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 15m 59.48949s[1] |
| Declination | +27° 55′ 34.6870″[1] |
| Apparent magnitude (V) | 5.99 - 6.35[2] |
| Characteristics | |
| Spectral type | F6Ib-II |
| Variable type | Classical Cepheid |
| Astrometry | |
| Proper motion (μ) | RA: 4.31 ± 0.22[1] mas/yr Dec.: 0.63 ± 0.34[1] mas/yr |
| Parallax (π) | 2.33 ± 0.32[1] mas |
| Distance | approx. 1,400 ly (approx. 430 pc) |
| Details | |
| Other designations | |
| Database references | |
| SIMBAD | data |
V473 Lyrae is a variable star in the constellation Lyra. It is an unusual Classical Cepheid variable with a range of 5.99 to 6.35 and a period of 1.49078 days.[2] It is unique in that it is the only known Cepheid in the Milky Way to undergo periodic phase and amplitude changes, analogous to the Blazhko effect in RR Lyrae stars.[3] At 1.5 days, its period was the shortest known for a classical Cepheid at the time of its discovery.[4]
References
- 1 2 3 4 5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
- 1 2 Watson, Christopher (17 September 2013). "V473 Lyrae". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 20 August 2015.
- ↑ Molnar, L.; Szabados, L. (2014). "V473 Lyrae, a unique second-overtone Cepheid with two modulation cycles". Monthly Notices of the Royal Astronomical Society 442 (4): 3222–3234. arXiv:1406.0494. Bibcode:2014MNRAS.442.3222M. doi:10.1093/mnras/stu1091.
- ↑ Breger, M. (1981). "The unusual Cepheid HR 7308 with a variable amplitude". The Astrophysical Journal 249: 666. Bibcode:1981ApJ...249..666B. doi:10.1086/159327.
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