YY CrB (Eclipsing binary)

RA: 15h 50m 32.43s, DE: +37° 50' 07.60" (237.6351249950, 37.8354444441)

Data:

  • Constellation: CrB
  • Variability type: EW
  • Maximal brightness (Mag): 8.643 (V)
  • Minimum brightness (Mag): 9.134 (V)
  • Brightness in secondary minimum (Mag): 8.643 (V)
  • Astrophysical interest: Light time effect (LTE), Period decreasing
  • Created: 7/27/1997
  • Created by: admin
Periodic elements:

  • Period (d): 0.376560000000000
  • Epoch (HJD): 48500.30100
  • Secondary Epoch (HJD): 48500.48900
Change log:

4/16/2026, Filip Walter:

  • Astrophysical interest: Light time effect (LTE) → Light time effect (LTE), Period decreasing
  • Period: 0.376565 → 0.37656
  • Period: 0.37656 → 0.376565

8/23/2025, Filip Walter:

  • Astrophysical interest: Nothing → Light time effect (LTE)

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

91 x

Number of observers

19 x

Last observed before

0 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2448500.301 + 0.37656 * E
S: M = 2448500.489 + 0.37656 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline