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Name
V Equ
AAVSO UID
Constellation
J2000.0
B1950.0
21 13 02.23 +07 02 42.3
Galactic coord.
58.178 -27.489
Other names(Internal only)
1SWASP J211530.40+071513.6
AN 113.1925
ASASSN-V J211530.31+071513.8
CSS_J211530.4+071513
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Variability type
RRAB/BL
Spectral type
--
Mag. range
14.40 - 15.70 V
Discoverer
Karl Reinmuth (1926)
Epoch
Outburst
--
Period
0.5251688 d (12.60405 h)
Rise/eclipse dur.
11% (1.386 h)
Remarks
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1
Wunder, Edgar
Based on data from 2003 to 2020 a 9.34-year (=3411 days) Blazhko modulation period in V Equulei is established. The alleged 320-day Blazhko period suspected by Greer et al. (2017) is an artefact. In the most extreme phases of the
Blazhko cycle the magnitude of the star varies between V=14.40 and 15.70, or V=14.95 to 15.35, respectively. Therefore the amplitude of the Blazhko modulation in V Equulei is 0.9 mag in V-band. Additionally three sudden changes of the fundamental pulsation period of V Equulei are detected in 2007, 2012 and 2016.
2
2017A&A...607A..11G
Detected Blazhko period 320.5 d. (2017A&A...607A..11G ).
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References
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1
Wunder, E., 2021, A 9-year Blazhko modulation period in V Equulei
2021BAVSR..70....1W
2
Greer, P. A.; Payne, S. G.; Norton, A. J.; et al., 2017, The SuperWASP
2017A&A...607A..11G
3
A.J. Drake, M. Catelan, S.G. Djorgovski et al., 2012, arXiv:1211.2866
2012arXiv1211.2866D
4
V.P.Zessewitsch, Letter, 1976.
--
5
Guthnick, P.; et al., 1926, Benennung von neu entdeckten veränderlichen
1926AN....227..161G
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service . These data may not be complete.
2MASS
J = 14.19 H = 13.90 K = 13.85 J - K = 0.34
AllWISE
W1 = 13.92 W2 = 13.87 W1 - W2 = 0.05
APASS-DR9
B = 15.53 V = 15.03 g' = 15.16 r' = 14.89 i' = 14.89 B - V = 0.50
GALEX-DR5
FUV = 22.02 NUV = 18.79 FUV - NUV = 3.23
SDSS-DR12
u = 16.70 g = 15.42 r = 15.13 i = 15.02 z = 14.96 u - g = 1.28 r - i = 0.11
Images
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Supporting Documents
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Revision History
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