RV Andromedae

RV Andromedae
Observation data; Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	02h 11m 02.5681s[1]
Declination	48° 56′ 45.048″[1]
Apparent magnitude (V)	9.0 - 11.5[2]
Characteristics
Spectral type	M4e[2]
B−V color index	1.607[3]
Variable type	Semi-regular[2]
Astrometry
Radial velocity (Rv)	−10.0±2.0[4] km/s
Proper motion (μ)	RA: 11.16±0.92[1] mas/yr ; Dec.: −1.67±0.97[1] mas/yr
Parallax (π)	0.62 ± 0.98[1] mas
Other designations
	BD+48 616, HIP 10192[4]
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.[2]

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.[5]

References

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
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.
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.
"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.

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[van_Leeuwen2007-1] 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

[gcvs-2] 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.

[TYCHO-3] 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.

[SIMBAD-4] "RV And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 12, 2018.

[Cadmus1991-5] 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.