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  DR And  
Andromeda Sequence
01 05 10.70 +34 13 06.0  (16.29458 +34.21833) Search nearby
B1950.0 01 02 24.55 +33 57 02.3
Galactic coord. 126.166 -28.567
Other names

(Internal only)
AAVSO 0059+33 SON 4709  
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Variability type
Spectral type A
Mag. range
12.0 - 12.8 p
Discoverer --
12 Oct 1960 (HJD 2437220.319) Ephemeris
Outburst --
Period 0.563118 d  (13.5148 h)
Rise/eclipse dur. 18%  (2.43 h)
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1 2006MNRAS.368.1757W Possible Blazhko star, period 57d.
2 GCVS Team P var. Before ~JD2437000 Max = 2436078.384 + 0.5630609d*E [V.P.Zessewitsch, Astron. Tsirk. N185, 1957.]; then P changed abruptly. Delta(m) changes by ~0.3m, Max A1 = 2436078.8 + 69.486d*N1, Max A2 = 2437646.65 + 69.719d*N2. Other possible cycles are 2000d (interaction of cycles N1 and N2) and ~30 years [Yu.S.Romanov, V.P.Zessewitsch, L.I. Shakun, P.S.Zgonyajko, Astron. Tsirk. N981, 1978.].
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1 Samus, N. N.; Kazarovets, E. V.; Durlevich, O. V.; et al., 2017, General
Catalogue of Variable Stars: Version GCVS 5.1 (November 2019)
2 Greer, P. A.; Payne, S. G.; Norton, A. J.; et al., 2017, The SuperWASP
catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect
3 Drake, A. J.; et al., 2013, RRab stars from Mount Lemmon Survey (MLS) and
Catalina Schmidt Survey (CSS)
4 Wils P., Lloyd C., Bernhard K., 2006, MNRAS 368, 1757 2006MNRAS.368.1757W
5 L.N.Berdnikov, Perem. Zvezdy Supplement 3, 321, 1977. 1977PZP.....3..321B
6 MVS N313, 1957. --
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Revision History
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6 Otero, Sebastian Alberto 2020-05-22 23:32 UTC Range and rise duration from the GCVS (November 2019 version).
5 Otero, Sebastian Alberto 2016-05-30 18:59 UTC Type, period and amplitude from CSS data. UCAC4 position.
4 Admin, VSX 2015-12-18 21:37 UTC Updated variability type to indicate Blazhko effect.
3 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2007-03-23 16:03 UTC Update from [2006MNRAS.368.1757W].
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.