YY Sgr (Eclipsing binary)

RA: 18h 44m 35.84s, DE: -19° 23' 23.00" (281.1493333283, -19.3897222219)

Tic: TIC 4900067, Hd: HD 173140, Gcvs: YY Sgr, TwoMass: 2MASS J18443583-1923229, Tyc: TYC 6288-734-1, Gaia: Gaia DR3 4092275247999652864

Data:
  • Constellation: Sgr
  • Variability type: EA
  • Maximal brightness (Mag): 10.020 (V)
  • Minimum brightness (Mag): 10.730 (V)
  • Brightness in secondary minimum (Mag): 10.640 (V)
  • Astrophysical interest: Excentric orbit of the binary, Apsidal motion
  • Created: 6/1/1996
  • Created by: admin
Show list of observations >>
Periodic elements:
  • Period (d): 2.628476000000000
  • Epoch (HJD): 19467.03700
  • Secondary Epoch (HJD): 19468.35100
Change log:

1/21/2026, Filip Walter:

  • Name: YY → YY Sgr
  • Astrophysical interest: Apsidal motion → Excentric orbit of the binary, Apsidal motion
  • Alternative designation: → Tic: TIC 4900067, Hd: HD 173140, Gcvs: YY Sgr, TwoMass: 2MASS J18443583-1923229, Tyc: TYC 6288-734-1, Gaia: Gaia DR3 4092275247999652864

11/19/2025, Filip Walter:

  • Astrophysical interest: Nothing → Apsidal motion

Chart
YY Sgr
Source: The STScI Digitized Sky Survey
Number of observations

3 x

Number of observers

2 x

Last observed before

2457 days

O-C diagram
Times of minima / maxima - including records from the original O-C gateway  
P: M = 2419467.037 + 2.628476 * E
S: M = 2419468.351 + 2.628476 * E
ID HJDmin Error (+/-) UTCmin Epoch O-C (d) P/S Phot. band Observer Publication Note Instrument
Phase curve
Comments

Timeline