V2540 Cyg (Eclipsing binary)

RA: 20h 23m 38.00s, DE: +46° 55' 53.00" (305.9083333283, 46.9313888882)

Other: 35760170

Data:
  • Constellation: Cyg
  • Variability type: EW
  • Maximal brightness (Mag): 12.440 (V)
  • Minimum brightness (Mag): 12.760 (V)
  • Brightness in secondary minimum (Mag): 12.710 (V)
  • Created: 9/3/2005
  • Created by: admin
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Periodic elements:
  • Period (d): 0.405005000000000
  • Epoch (HJD): 52829.48870
  • Secondary Epoch (HJD): 52829.69100
Change log:

10/25/2025, Filip Walter:

  • Brightness in secondary minimum: 12.76 → 12.71
  • Variability type: E → EW
  • Brightness in secondary minimum: 12.4 → 12.76
  • Minimum brightness: 12.4 → 12.76
  • Maximal brightness: 12.4 → 12.44

Chart
V2540 Cyg
Source: The STScI Digitized Sky Survey
Number of observations

3 x

Number of observers

3 x

Last observed before

5218 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2452829.4887 + 0.405005 * E
S: M = 2452829.691 + 0.405005 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline