CzeV634 (Eclipsing binary)

RA: 15h 33m 39.86s, DE: +63° 56' 00.59" (233.4160750000, 63.9334972219)

CzeV: CzeV634, Gsc: GSC 4184 317, Ucac4: UCAC4 770-041350, Gaia: Gaia DR3 1640895833145873408

Data:
  • Constellation: Dra
  • Variability type: EA
  • Maximal brightness (Mag): 14.980 (V)
  • Minimum brightness (Mag): 15.300 (V)
  • Astrophysical interest: Combination of more effects, Excentric orbit of the binary, Wrong period
  • Created: 1/22/2015
  • Created by: Jan Janík
Show list of observations >>
Periodic elements:
  • Period (d): 7.900000000000000
  • Epoch (HJD): 2457840.43575
  • Secondary Epoch (HJD): 2457844.38575 (est.)
Additional data:
  • Discoverer: Jan Janík
  • Discovery year: 2015
  • Note: 
    nalezeno na Mt. Suhora Observatory při pozorování TW Dra
Change log:

9/26/2026, Filip Walter:

  • Epoch: 2457036.61707 → 2457840.43575
  • Epoch: 2457036.61615 → 2457036.61707
  • Additional orbital elements: { "Name": "EA 2", "Period": 7.9, "M0": 2457840.44 } →
  • Period: 2.805 → 7.9
  • Additional orbital elements: { "Name": "EA 1", "Period": 2.81, "M0": 2457036.62 }, { "Name": "EA 2", "Period": 7.9, "M0": 2457840.44 } → { "Name": "EA 2", "Period": 7.9, "M0": 2457840.44 }
  • Epoch: 2457840.43575 → 2457036.61615
  • Period: 7.9 → 2.805
  • Additional orbital elements: { "Name": "EA 2", "Period": 7.9, "M0": 2457840.44 }, { "Name": "EA 1", "Period": 2.805, "M0": 2457036.62 } → { "Name": "EA 2", "Period": 7.9, "M0": 2457840.44 }, { "Name": "EA 1", "Period": 2.81, "M0": 2457036.62 }
  • Additional orbital elements: { "Name": "EA 2", "Period": 7.9, "M0": 2457840.43575 }, { "Name": "EA 1", "Period": 2.81, "M0": 2457036.62 } → { "Name": "EA 1", "Period": 2.805, "M0": 2457036.62 }, { "Name": "EA 2", "Period": 7.9, "M0": 2457840.44 }
  • Additional orbital elements: { "Name": "EA 1", "Period": 2.805, "M0": 2457036.61615 } → { "Name": "EA 1", "Period": 2.81, "M0": 2457036.62 }, { "Name": "EA 2", "Period": 7.9, "M0": 2457840.43575 }
  • Astrophysical interest: Excentric orbit of the binary, Wrong period → Combination of more effects, Excentric orbit of the binary, Wrong period
  • Additional orbital elements: → { "Name": "EA 1", "Period": 2.805, "M0": 2457036.61615 }

9/15/2026, Filip Walter:

  • Photometric band: Null → V
  • Minimum brightness: 0 → 15.3
  • Maximal brightness: 0 → 14.98
  • CI: Gaia: Null → Gaia DR3 1640895833145873408
  • Astrophysical interest: Wrong period → Excentric orbit of the binary, Wrong period
  • Period: 2.806 → 7.9
  • Period: 0 → 2.806
  • Astrophysical interest: Nothing → Wrong period
  • Epoch: 0 → 2457840.43575
  • Photometric band: → Null

Chart
CzeV634
Source: The STScI Digitized Sky Survey, FoV: 15 x 15 arcmin
Number of observations

17 x

Number of observers

2 x

Last observed before

3432 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2457840.43575 + 7.9 * E
S: M = 2457844.38575 + 7.9 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline