ER Ori (Eclipsing binary)

RA: 05h 11m 14.50s, DE: -08° 33' 24.70" (77.8104200000, -8.5568600000)

Aavso: AAVSO 0506-08, Asas: ASAS J051114-0833.4, AsasSnV: ASASSN-V J051114.53-083324.8, Gaia: Gaia DR3 3206917595908399232, Gcvs: ER Ori, Gsc: GSC 05330-00784, Hip: HIP 24156, Tic: TIC 43846099, TwoMass: 2MASS J05111450-0833247, Tyc: TYC 5330-784-1, Other: 1RXS J051114.9-083318, Other: AN 45.1929, Other: BD-08 1050, Other: SAO 131854

Data:
  • Constellation: Ori
  • Variability type: EW/KW
  • Maximal brightness (Mag): 9.320 (V)
  • Minimum brightness (Mag): 9.930 (V)
  • Brightness in secondary minimum (Mag): 9.920 (V)
  • Astrophysical interest: Light time effect (LTE), Period increasing
  • Created: 6/1/1996
  • Created by: admin
Show list of observations >>
Periodic elements:
  • Period (d): 0.423400500000000
  • Epoch (HJD): 26386.19300
  • Secondary Epoch (HJD): 26386.40500
Change log:

9/25/2026, Filip Walter:

  • Variability type: EW → EW/KW
  • Declination: -8.5568611111 → -8.55686
  • Right ascension: 77.8104166617 → 77.81042
  • Name: ER → ER Ori
  • Astrophysical interest: Nothing → Light time effect (LTE), Period increasing
  • CI: Tyc: Null → TYC 5330-784-1
  • CI: TwoMass: Null → 2MASS J05111450-0833247
  • CI: Tic: Null → TIC 43846099
  • CI: Other: Null → 1RXS J051114.9-083318, AN 45.1929, BD-08 1050, SAO 131854
  • CI: Hip: Null → HIP 24156
  • CI: Gsc: Null → GSC 05330-00784
  • CI: Gcvs: Null → ER Ori
  • CI: Gaia: Null → Gaia DR3 3206917595908399232
  • CI: AsasSnV: Null → ASASSN-V J051114.53-083324.8
  • CI: Asas: Null → ASAS J051114-0833.4
  • CI: Aavso: Null → AAVSO 0506-08

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

20 x

Number of observers

9 x

Last observed before

42 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2426386.193 + 0.4234005 * E
S: M = 2426386.405 + 0.4234005 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline