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Today is Fri May 3 18:35:58 CEST 2024JD 2460434.1916435
 

GEOS RR-Lyr database

Type star name:  
 

V340 Lyr

 

GCVS data
GCVS number 520340
Variable star identification183957.00+325008.3

Coordinates:

RA/DEC (J2000.0) 279.9874995 32.8356389 degrees
Proper motion (RA/DEC) 0.02 -0.002 arc sec/year
Epoch of coordinates 2000
Reference for coordinates NPM

Variable star characteristics:

Type RRAB
magnitudes at max 13.5 , at min 14.7 (p)
Elements: 2429906.325 + 0.584456 E
M-m 18 %
spectrum
reference for type [04184] C.Thaenert, VSS 8, H.4, 215, 1974
reference for finding chart [03910] C.Hoffmeister, AN 289, H.3, 139, 1966

Cross identification

GSC 2641.01348
S 09319

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:

2429906.325 + 0.584456 E (GCVS (Kholopov et al.; 1988-2006))
2429906.325 + 0.584456 E (GCVS (Samus et al.; 2011))

  Origin Period Quad. term  
Type Elements:  
  Or
 

Current elements: 2429906.325 + 0.584456 E

5 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  
  457173.4917      0.0025      0.206      -3375332      0      J.F. Le Borgne, 2015, pr. com.      M. Audejean      ccd      V filter     
  457180.5062      0.0026      0.207      -3375320      0      J.F. Le Borgne, 2015, pr. com.      M. Audejean      ccd      V filter     
  457190.4413      0.0019      0.206      -3375303      0      J.F. Le Borgne, 2015, pr. com.      M. Audejean      ccd      V filter     
  457197.4557      0.0017      0.207      -3375291      0      J.F. Le Borgne, 2015, pr. com.      M. Audejean      ccd      V filter     
  457245.3806      0.0021      0.207      -3375209      0      J.F. Le Borgne, 2015, pr. com.      J.M. Vilalta (AAS)      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.
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Today is Fri May 3 18:35:58 CEST 2024