OQ Cnc (Eclipsing binary)

RA: 08h 26m 40.65s, DE: +31° 14' 59.00" (126.6693749950, 31.2497222219)

3/20/2026, 02:00 - 3/20/2026, 03:37 (UTC)

Data:
  • Observer: Bill Tschumy
  • Created: 3/20/2026, 17:17
  • Station: Home Observatory
    Lat: +40°, Long: -105°
  • Instrument: Agema 130 SD; ZWO 2600MM Pro, V,B
  • Photometric band: V
  • Time standard: Gjd
  • Brightness in: Mag
Determined minima
  • P: 2461119.64035 (3/20/2026, 03:22)
    HJDmin: 2461119.64332 +/- 0.00351  
    Heliocentric correction: 0.00298
    Note: 
    Something is strange with this star.  I barely caught the minimum.  According to the minimum magnitude of around 11.35, this should be a secondary eclipse.  Yet the ToM only lines up with previous measurements if I say it is a primary eclipse.

Pretty sure it is secondary because I combined my data with ASAS-SN data and analyses it in Peranso.  My data clearly lines up with the secondary eclipse. I can sent the phase plot is anyone cares.
Actions:
Light curve
Neighborhood of the object, comparison and check stars
Chart - OQ Cnc, JD 2461119.58356
Comments