| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 02h 11m 02.56581s[2] |
| Declination | 48° 56′ 45.0634″[2] |
| Apparent magnitude (V) | 9.0–11.5[3] |
| Characteristics | |
| Spectral type | M4e[3] |
| B−V color index | 1.607[4] |
| Variable type | Semi-regular[3] |
| Astrometry | |
| Radial velocity (Rv) | −10.0±2.0[5] km/s |
| Proper motion (μ) | RA: 10.456(48)[2] mas/yr Dec.: −0.958(56)[2] mas/yr |
| Parallax (π) | 1.0950 ± 0.0483 mas[2] |
| Distance | 3,000 ± 100 ly (910 ± 40 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
RV Andromedae is a variable star in the constellation of Andromeda. It is classified as a semiregular variable pulsating giant star, and varies from an apparent visual magnitude of 11.5 at minimum brightness to a magnitude of 9.0 at maximum brightness, with a period of approximately 168.9 days.[3]
This is one of the Mira variables where mode switching of pulsations have been observed; amplitude and periods have been seen decreasing and subsequently increasing back to values near the previous ones.[6]
- ^ Cite error: The named reference
aavsowas invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
Gaia EDR3was invoked but never defined (see the help page). - ^ a b c d RV 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 Accessed on line 2009-06-30.
- ^ Cite error: The named reference
TYCHOwas invoked but never defined (see the help page). - ^ a b "RV And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 12, 2018.
- ^ Cadmus, R. R. Jr.; et al. (1991), "Observation of Possible Mode Switching in Three Semiregular Variable Stars", Astronomical Journal, 101: 1043, Bibcode:1991AJ....101.1043C, doi:10.1086/115746.