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Today is Fri May 3 23:17:53 CEST 2024JD 2460434.387419
 

GEOS RR-Lyr database

Type star name:  
 

V347 Her

 

GCVS data
GCVS number 400347
Variable star identification184457.90+230315.4

Coordinates:

RA/DEC (J2000.0) 281.2412505 23.0542778 degrees
Proper motion (RA/DEC) 0.004 -0.02 arc sec/year
Epoch of coordinates 2000
Reference for coordinates UCAC2

Variable star characteristics:

Type RRAB
magnitudes at max 13.5 , at min 15.5 (p)
Elements: 2436104.27 + 0.5373136 E
M-m 20 %
spectrum
reference for type [03506] V.P.Zessewitsch, Stars of RR Lirae Type (in russian), Kiev, 1966
reference for finding chart [00492] O.Morgenroth, AN 251, 17, 1934

Remarks

P var. Max = 2415288.21 + 0.5373619d*E (JD2415288 - 18596); since JD2429495 - see Table.

Cross identification

AN 1933.0702
GSC 2108.01877

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:

2436104.27 + 0.5373136 E (GCVS (Kholopov et al.; 1988-2006))
2436104.27 + 0.5373136 E (GCVS (Samus et al.; 2011))

  Origin Period Quad. term  
Type Elements:  
  Or
 

Current elements: 2436104.27 + 0.5373136 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  
  457269.9849      0.0018      -0.177      -3682829      0      J.F. Le Borgne, 2015, pr. com.      Kenji Hirosawa      ccd      V filter     

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Lightcurve from AAVSO data
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Today is Fri May 3 23:17:53 CEST 2024