AK Dra (Eclipsing binary)

RA: 18h 16m 43.17s, DE: +53° 14' 47.50" (274.1798749900, 53.2465277774)

Data:
  • Constellation: Dra
  • Variability type: EA
  • Maximal brightness (Mag): 11.800 (P)
  • Minimum brightness (Mag): 12.600 (P)
  • Brightness in secondary minimum (Mag): 11.800 (P)
  • Astrophysical interest: Period increasing
  • Created: 6/1/1996
  • Created by: admin
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Periodic elements:
  • Period (d): 2.218258000000000
  • Epoch (HJD): 26828.56100
  • Secondary Epoch (HJD): 26829.67000
Change log:

6/28/2025, Filip Walter:

  • Astrophysical interest: Nothing → Period increasing

Chart
AK Dra
Source: The STScI Digitized Sky Survey
Number of observations

14 x

Number of observers

4 x

Last observed before

278 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2426828.561 + 2.218258 * E
S: M = 2426829.67 + 2.218258 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline