CzeV257 (Eclipsing binary)

RA: 15h 56m 52.22s, DE: +85° 28' 12.44" (239.2175958283, 85.4701222216)

CzeV: CzeV257, Gsc: GSC 4638-934, Ucac4: UCAC4 878-004821, Other: G4638.934

Data:
  • Constellation: UMi
  • Variability type: EA
  • Maximal brightness (Mag): 11.190 (V)
  • Minimum brightness (Mag): 11.830 (V)
  • Brightness in secondary minimum (Mag): 11.480 (V)
  • Created: 7/30/2014
  • Created by: admin
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Periodic elements:
  • Period (d): 7.226393000000000
  • Epoch (JD): 2455689.52755
  • Secondary Epoch (JD): 2455693.1407465 (est.)
Additional data:
  • Discoverer: Jiří Polák
  • Discovery year: 2011
  • M-m: 0.5
  • Note: 
    M0=2455689.529. P=18.07 (jen přes 2 minima). http://var2.astro.cz/obslog.php?phase=yes&star=G4638.934+UMi&obs_id=1270489348&projekt=%25&M0_ph=2455689.529&PER_ph=18.07000&submit=Vykreslit+f%E1zovou+k%F8ivku&ph_min=0.98&ph_max=1.02&shift_1335858844=0.00&shi
Chart
CzeV257
Source: The STScI Digitized Sky Survey
Number of observations

72 x

Number of observers

8 x

Last observed before

3 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2455689.52755 + 7.226393 * E
S: M = 2455693.1407465 + 7.226393 * E
ID HJDmin UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
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Timeline