CM Dra (Eclipsing binary, Intrinsic variable, Eruptive variable)

RA: 16h 34m 20.33s, DE: +57° 09' 44.39" (248.5847100000, 57.1623300000)

Data:
  • Constellation: Dra
  • Variability type: EA+UV+BY
  • Maximal brightness (Mag): 12.870 (V)
  • Minimum brightness (Mag): 13.630 (V)
  • Brightness in secondary minimum (Mag): 13.630 (V)
  • D (h): 1.218
  • Astrophysical interest: Peaks on the light curve
  • Created: 6/1/1996
  • Created by: admin
Show list of observations >>
Periodic elements:
  • Period (d): 1.268390000000000
  • Epoch (HJD): 42893.93250
  • Secondary Epoch (HJD): 42894.56670
Change log:

12/20/2025, Filip Walter:

  • Declination: 57.1621944444 → 57.16233
  • Right ascension: 248.58424999 → 248.58471
  • Declination: 57.1621944444 → 57.16233
  • Right ascension: 248.58424999 → 248.58471
  • Declination: 57.1621944444 → 57.16233
  • Right ascension: 248.58424999 → 248.58471
  • Declination: 57.1621944444 → 57.16233
  • Right ascension: 248.58424999 → 248.58471
  • Declination: 57.1621944444 → 57.16233
  • Right ascension: 248.58424999 → 248.58471
  • D: Null → 1.2177
  • Variability type: EA → EA+UV+BY
  • Astrophysical interest: Nothing → Peaks on the light curve
  • Eruptive variable: False → True
  • Intrinsic variable: False → True

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

82 x

Number of observers

11 x

Last observed before

2 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2442893.9325 + 1.26839 * E
S: M = 2442894.5667 + 1.26839 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline