OO Leo (Eclipsing binary)

RA: 11h 27m 23.28s, DE: +04° 42' 18.61" (171.8470000000, 4.7051700000)

Gsc: GSC 0267-253

Data:
  • Constellation: Leo
  • Variability type: EW
  • Maximal brightness (Mag): 10.460 (V)
  • Minimum brightness (Mag): 10.860 (V)
  • Brightness in secondary minimum (Mag): 10.460 (V)
  • Astrophysical interest: Period increasing
  • Created: 4/18/2009
  • Created by: admin
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Periodic elements:
  • Period (d): 0.446451000000000
  • Epoch (HJD): 52038.87000
  • Secondary Epoch (HJD): 52039.09300
Change log:

10/27/2025, Filip Walter:

  • Name: OO → OO Leo
  • Alternative designation: : G0267-253, : G0267.0253 → Gsc: GSC 0267-253
  • Declination: 4.7066666667 → 4.70517
  • Right ascension: 171.8458333333 → 171.847
  • Astrophysical interest: Nothing → Period increasing

Chart
OO Leo
Source: The STScI Digitized Sky Survey
Number of observations

13 x

Number of observers

5 x

Last observed before

1851 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2452038.87 + 0.446451 * E
S: M = 2452039.093 + 0.446451 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline