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

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

AsasSnV: ASASSN-V J163418.11+571002.7, Gaia: Gaia DR3 1431176943768690816, Gcvs: CM Dra, Tic: TIC 199574208, Tic: TIC 199574209, TwoMass: 2MASS J16342040+5709439, TwoMass: 2MASS J16342041+5709489, UsnoB: USNO-B1.0 1471-00307615, Other: 1RXH J163420.0+570942, Other: 1RXS J163421.2+570933, Other: 1WGA J1634.3+5709, Other: 2RXP J163421.3+570941, Other: 2RXS J163421.1+570933, Other: 3XMM J163419.7+570949, Other: G 225-67, Other: GJ 630.1 A, Other: RX J1634.3+5709, Other: T-Dra0-01363

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:

9/23/2026, Filip Walter:

  • Name: CM → CM Dra
  • CI: UsnoB: Null → USNO-B1.0 1471-00307615
  • CI: TwoMass: Null → 2MASS J16342040+5709439, 2MASS J16342041+5709489
  • CI: Tic: Null → TIC 199574208, TIC 199574209
  • CI: Other: Null → 1RXH J163420.0+570942, 1RXS J163421.2+570933, 1WGA J1634.3+5709, 2RXP J163421.3+570941, 2RXS J163421.1+570933, 3XMM J163419.7+570949, G 225-67, GJ 630.1 A, RX J1634.3+5709, T-Dra0-01363
  • CI: Gcvs: Null → CM Dra
  • CI: Gaia: Null → Gaia DR3 1431176943768690816
  • CI: AsasSnV: Null → ASASSN-V J163418.11+571002.7

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, FoV: 15 x 15 arcmin
Number of observations

83 x

Number of observers

11 x

Last observed before

222 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