Astronomy:RV Andromedae

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Short description: Star in the constellation Andromeda
RV Andromedae
RVAndLightCurve.png
The visual band light curve of RV Andromedae, from AAVSO data[1]
Observation data
Equinox J2000.0]] (ICRS)
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[2] mas
Distance3,000 ± 100 ly
(910 ± 40 pc)
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. https://www.aavso.org/data-download. 
  2. 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  3. 3.0 3.1 3.2 3.3 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. et al. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy & Astrophysics 355: L27–L30, Bibcode2000A&A...355L..27H. 
  5. 5.0 5.1 "RV And". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=RV+And. 
  6. Cadmus, R. R. Jr. et al. (1991), "Observation of Possible Mode Switching in Three Semiregular Variable Stars", Astronomical Journal 101: 1043, doi:10.1086/115746, Bibcode1991AJ....101.1043C.