RV Andromedae

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RV Andromedae
RVAndLightCurve.png
The visual band light curve of RV Andromedae, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 02h 11m 02.5681s[2]
Declination 48° 56′ 45.048″[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: 11.16±0.92[2] mas/yr
Dec.: −1.67±0.97[2] mas/yr
Parallax (π)0.62 ± 0.98[2] mas
Other designations
BD+48 616, HIP 10192[5]
Database references
SIMBADdata


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]

References[]

  1. ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. ^ a b c d e van Leeuwen, F. (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. S2CID 18759600. Vizier catalog entry
  3. ^ 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.
  4. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy & Astrophysics, 355: L27–L30, Bibcode:2000A&A...355L..27H.
  5. ^ a b "RV And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 12, 2018.
  6. ^ 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.
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