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Today is Mon Apr 29 17:55:50 CEST 2024JD 2460430.1637731
 

GEOS RR-Lyr database

Type star name:  
 

V1820 Ori

 

GCVS data
GCVS number 601820
Variable star identification055437.10+0454110

Coordinates:

RA/DEC (J2000.0) 88.654584 4.9030556 degrees
Proper motion (RA/DEC) 0 0 arc sec/year
Epoch of coordinates 0
Reference for coordinates GCVS

Variable star characteristics:

Type RRAB
magnitudes at max 12.5 , at min 13.4 (V)
Elements: 0 + 0 E
M-m 0 %
spectrum
reference for type [79100] Kazarovets, E.V., Pastukhova, E.N., and Samus, N.N. 2007, this paper
reference for finding chart [79181] Hoffmeister, C. and Gessner, H. 1957, MVS, Nr. 293

Remarks

Blazhko effect, P(Bl) = 28d [169].

Cross identification

NSV 02724
GSC 0125.00449
S 03931
CSV 000695

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:

2451571.86 + 0.47927 E (Wils et al. 2006)
2453042.598 + 0.479067 E (GCVS (Samus et al.; 2011))

  Origin Period Quad. term  
Type Elements:  
  Or
 

Current elements: 2451571.86 + 0.47927 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  
  457303.2658      0.0016      0.236      -4161055      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 Mon Apr 29 17:55:50 CEST 2024