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Today is Tue May 7 21:44:18 CEST 2024JD 2460438.3224306
 

GEOS RR-Lyr database

Type star name:  
 

AN Ser

 

GCVS data
GCVS number 760067
Variable star identification155331.05+125740.1

Coordinates:

RA/DEC (J2000.0) 238.3793745 12.9611389 degrees
Proper motion (RA/DEC) -0.002 -0.006 arc sec/year
Epoch of coordinates 2000
Reference for coordinates Hip

Variable star characteristics:

Type RRAB
magnitudes at max 10.4 , at min 11.44 (V)
Elements: 2414708.95 + 0.52207162 E
M-m 18 %
spectrum A7-F5
reference for type [07258] S.Kanyo, B.Szeidl, Bud Mitt N64, 1974
reference for finding chart [02740] A.A.Batyrev, Perem Zvezdy 12, N2, 137, 1959

Remarks

P var? Max = 2429156.260 + 0.5220703d*E (JD2427000 - 38000) [00001]; since JD2438000 - see Table. According to [02740], Blazhko effect with Pi = 21.94d; the presence of the Blazhko effect is denied in [07258]. Delta(S) = 0.

Cross identification

AN 1935.0045
GSC 0951.00213
Hip 077830

Elements

By default the database elements are used in O-C calculation. If several elements are available, the user may choose one of them. A form allows the user to enter his/her own elements. If they are given they become the current elements until the button "Reset to database elements" is pressed.

Elements avalable in database:

2414708.95 + 0.52207162 E (GCVS (Samus et al.; 2011))
2414708.95 + 0.52207162 E (GCVS (Kholopov et al.; 1988-2006))
2434265.2461 + 0.5220713 E (Le Borgne et al., 2007c)

  Origin Period Quad. term  
Type Elements:  
  Or
 

Current elements: 2414708.95 + 0.52207162 E

1 maximums


Symbol colors: green: photographic; yellow: visual; red: photoelectric; bleu: ccd; no color: unknown

Plot O-C as function of HJD Cycle number

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  HJD   Unc.   O-C   E   period   Ref.   Observer   meth.   comments  
    (day)     shift  
  457178.4344      0.0028      -0.005      -3749544      0      J.F. Le Borgne, 2015b, pr. com.      Tarot - Calern      ccd          

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Lightcurve from AAVSO data
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Today is Tue May 7 21:44:18 CEST 2024