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Today is Fri May 3 22:24:09 CEST 2024JD 2460434.3501042
 

GEOS RR-Lyr database

Type star name:  
 

EP Her

 

GCVS data
GCVS number 400159
Variable star identification175509.38+263618.6

Coordinates:

RA/DEC (J2000.0) 268.789083 26.6051667 degrees
Proper motion (RA/DEC) -0.005 -0.009 arc sec/year
Epoch of coordinates 2000
Reference for coordinates UCAC2

Variable star characteristics:

Type RRAB
magnitudes at max 12.44 , at min 13.54 (V)
Elements: 2428048.349 + 0.4257209 E
M-m 13 %
spectrum
reference for type [00611] V.P.Zessewitsch, Odessa Byull N1, 1945
reference for finding chart [02312] MVS N248, 1957

Cross identification

AN 1931.0196
GSC 2098.02384

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:

2428048.349 + 0.4257209 E (GCVS (Kholopov et al.; 1988-2006))
2428048.349 + 0.4257209 E (GCVS (Samus et al.; 2011))

  Origin Period Quad. term  
Type Elements:  
  Or
 

Current elements: 2428048.349 + 0.4257209 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

Toggle period shift ON OFF

  HJD   Unc.   O-C   E   period   Ref.   Observer   meth.   comments  
    (day)     shift  
  457153.0872      0.0011      0.079      -4629548      0      J.F. Le Borgne, 2015, pr. com.      Kenji Hirosawa      ccd      V filter     

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Lightcurve from AAVSO data
Enter JD of beginning and end of lightcurve and click on the " AAVSO lightcurve " button.
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Today is Fri May 3 22:24:09 CEST 2024