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Today is Sat May 4 10:25:57 CEST 2024JD 2460434.8513542
 

GEOS RR-Lyr database

Type star name:  
 

BL Ari

 

GCVS data

 Not a GCVS star

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:
2451409.93 + 0.50921 E (GCVS (Samus et al.; 2011))

  Origin Period Quad. term  
Type Elements:  
  Or
 

Current elements: 2451409.93 + 0.50921 E

2 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  
  457310.0564      0.0016      0.094      -3916066      0      J.F. Le Borgne, 2015, pr. com.      Kenji Hirosawa      ccd      V filter     
  457357.9221      0.0038      0.094      -3915972      0      J.F. Le Borgne, 2015, pr. com.      Kenji Hirosawa      ccd      V filter     

No image Access to Simbad data

Lightcurve from AAVSO data
Enter JD of beginning and end of lightcurve and click on the " AAVSO lightcurve " button.
  No image


Today is Sat May 4 10:25:57 CEST 2024