GM Dra (Eclipsing binary)

RA: 17h 20m 21.88s, DE: +57° 58' 27.00" (260.0911666617, 57.9741666660)

Data:
  • Constellation: Dra
  • Variability type: EB
  • Maximal brightness (Mag): 8.794 (V)
  • Minimum brightness (Mag): 9.025 (V)
  • Brightness in secondary minimum (Mag): 8.794 (V)
  • Astrophysical interest: Period decreasing
  • Created: 7/27/1997
  • Created by: admin
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Periodic elements:
  • Period (d): 0.338741000000000
  • Epoch (JD): 48500.16910
  • Secondary Epoch (JD): 48500.33850
Change log:

6/25/2025, Filip Walter:

  • Astrophysical interest: Nothing → Period decreasing

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

36 x

Number of observers

10 x

Last observed before

186 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2448500.1691 + 0.338741 * E
S: M = 2448500.3385 + 0.338741 * E
ID HJDmin UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline