AL UMi (Eclipsing binary)

RA: 19h 57m 12.49s, DE: +86° 45' 26.00" (299.3020416667, 86.7572222222)

Data:
  • Constellation: UMi
  • Variability type: EW
  • Maximal brightness (Mag): 12.350 (R)
  • Minimum brightness (Mag): 12.600 (R)
  • Brightness in secondary minimum (Mag): 12.600 (R)
  • Astrophysical interest: Possible period changes
  • Created: 2/21/2008
  • Created by: admin
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Periodic elements:
  • Period (d): 0.476869000000000
  • Epoch (JD): 51495.80000
  • Secondary Epoch (JD): 51496.03800
Change log:

10/19/2025, Filip Walter:

  • Astrophysical interest: Nothing → Possible period changes

Chart
AL UMi
Source: The STScI Digitized Sky Survey
Number of observations

2 x

Number of observers

2 x

Last observed before

0 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2451495.8 + 0.476869 * E
S: M = 2451496.038 + 0.476869 * E
ID HJDmin UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline