BL And (Eclipsing binary)

RA: 23h 11m 24.20s, DE: +51° 52' 32.00" (347.8508333283, 51.8755555549)

Tic: TIC 252745554, Gsc: GSC 03635-01121, Gsc: GSC 03635-01169, Gcvs: BL And, TwoMass: 2MASS J23112426+5152314, Tyc: TYC 3635-1169-1, Nsvs: NSVS 1502773, Gaia: Gaia DR3 1992215671110689152

Data:

  • Constellation: And
  • Variability type: EB/KE,NCB
  • Maximal brightness (Mag): 11.000 (P)
  • Minimum brightness (Mag): 11.740 (P)
  • Brightness in secondary minimum (Mag): 11.240 (P)
  • Astrophysical interest: Period decreasing
  • Created: 7/11/1997
  • Created by: admin
Periodic elements:

  • Period (d): 0.722376000000000
  • Epoch (HJD): 47481.31600
  • Secondary Epoch (HJD): 47481.67700
Change log:

1/16/2026, Filip Walter:

  • Alternative designation: → Tic: TIC 252745554, Gsc: GSC 03635-01121, Gsc: GSC 03635-01169, Gcvs: BL And, TwoMass: 2MASS J23112426+5152314, Tyc: TYC 3635-1169-1, Nsvs: NSVS 1502773, Gaia: Gaia DR3 1992215671110689152
  • Variability type: EB/KE → EB/KE,NCB
  • Name: BL → BL And
  • Astrophysical interest: Nothing → Period decreasing

Number of observations

19 x

Number of observers

9 x

Last observed before

113 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2447481.316 + 0.722376 * E
S: M = 2447481.677 + 0.722376 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline