GU Boo (Eclipsing binary, Eruptive variable)

RA: 15h 21m 54.80s, DE: +33° 56' 10.00" (230.4783333333, 33.9361111108)

Tic: TIC 284291780, Ztf: ZTF J152154.84+335608.6, TwoMass: 2MASS J15215482+3356088, Gsc: GSC 02566-00776, Gcvs: GU Boo, Nsvs: NSVS 7820507, Crts: CRTS J152154.8+335609, Gaia: Gaia DR3 1278589709364139520

Data:
  • Constellation: Boo
  • Variability type: EA
  • Maximal brightness (Mag): 13.100 (V)
  • Minimum brightness (Mag): 13.700 (V)
  • Brightness in secondary minimum (Mag): 13.100 (V)
  • D (h): 1.200
  • Astrophysical interest: Possible period changes, Peaks on the light curve
  • Created: 6/6/2003
  • Created by: admin
Show list of observations >>
Periodic elements:
  • Period (d): 0.488729600000000
  • Epoch (HJD): 51275.87600
  • Secondary Epoch (HJD): 51276.12000
Change log:

2/16/2026, Filip Walter:

  • Name: GU → GU Boo
  • Alternative designation: → Tic: TIC 284291780, Ztf: ZTF J152154.84+335608.6, TwoMass: 2MASS J15215482+3356088, Gsc: GSC 02566-00776, Gcvs: GU Boo, Nsvs: NSVS 7820507, Crts: CRTS J152154.8+335609, Gaia: Gaia DR3 1278589709364139520

12/20/2025, Filip Walter:

  • D: Null → 1.2
  • Astrophysical interest: Nothing → Possible period changes, Peaks on the light curve
  • Eruptive variable: False → True

Chart
GU Boo
Source: The STScI Digitized Sky Survey
Number of observations

121 x

Number of observers

12 x

Last observed before

4 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2451275.876 + 0.4887296 * E
S: M = 2451276.12 + 0.4887296 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline