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Name
  RR Gem  
AAVSO UID
000-BBM-940 (62390 observations)  
Constellation
Gemini Sequence
J2000.0
07 21 33.53 +30 52 59.5  (110.38971 +30.88319) Search nearby
B1950.0 07 18 22.18 +30 58 42.1
Proper motion
RA: -0.184 +/- 0.245 mas/yDec: 1.287 +/- 0.160 mas/ySource: Gaia DR1
Galactic coord. 187.447 +19.521
Other names

(Internal only)
AAVSO 0715+31 AN 13.1903 HIP 35667
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Variability type
RRAB/BL
Spectral type A9-F6
Mag. range
10.62 - 11.99 V
Discoverer L. Ceraski
Epoch
09 Feb 1972 (HJD 2441357.205) Ephemeris
Outburst --
Period 0.3973106 d  (9.53545 h)
Rise/eclipse dur. 13%  (1.240 h)
Remarks
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1 Admin, VSX Blazhko period 7.2d, amplitude 0.09V [2009arXiv0908.1015J].
2 GCVS Team P var. Max = 2415219.734 + 0.39729235d*E (JD2412000 - 18000); Max = 2418278.900 + 0.39727274d*E (JD2418000 - 21000); Max = 2422865.229 + 0.39724027d*E (JD2421000 - 25000) [W.F.H.Waterfield, HB N848, 25, 1927.]; Max = 2427150.267 + 0.3972596d*E (JD2426200 - 27850); Max = 2434806.289 + 0.3973103d*E (JD2428200 - 34900) [P.P.Parenago, Perem. Zvezdy 11, N4, 236, 1958.]; since JD2436000 - see Table. Blazhko effect, PB = 48d [J.Balazs-Detre, KVB N27, 1960.], PB = 37d [B.Szeidl, IAU Coll N29, Invited Papers, P.133, 1976.]. Delta(S) = 3.
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References
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1 J. Jurcsik et al., 2009, arXiv:0908.1015v1 [astro-ph.SR] 2009arXiv0908.1015J
2 G.A.Lange, V.D.Motrich, B.N.Firmanyuk, V.P.Zessewitsch, Astron. Tsirk.
N900, 1976.
--
3 W.Ceraski, Mosc Ann (2), 5, Kartenserie 1, 1908. --
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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 = 10.45H = 10.19K = 10.18J - K = 0.27
AllWISE W1 = 10.22W2 = 10.22W3 = 10.05W1 - W2 = 0.00
APASS-DR9 B = 11.29V = 11.10g' = 11.02r' = 11.03i' = 11.06B - V = 0.19
SDSS-DR12 u = 14.87g = 13.91r = 14.01i = 13.47z = 13.32u - g = 0.96r - i = 0.54
Images
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Supporting Documents
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Revision History
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4 Billiaert, Bruno 2015-12-28 11:51 UTC discoverer added (1903AN....161..363C)
3 Admin, VSX 2015-12-18 21:44 UTC Updated variability type to indicate Blazhko effect.
2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.