Eclipsant type β Lyrae (type EB)

These are eclipsant systems with ellipsoidal components and light curves for which it is not possible to specify the exact start and end times of eclipses due to a continuous change in the apparent combined brightness of the system between eclipses; in all cases a secondary minimum is observed, whose depth is usually considerably less than the primary minimum; the periods are mostly longer than 0.5 days. The components generally belong to the first spectral types (B-A). The light amplitudes are generally <2 mag. in V.

(description according to VARIABLE STAR TYPE DESIGNATIONS IN VSX at https://www.aavso.org/vsx/index.php?view=about.vartypes)

Star UCAC4 627-090198

Variable of type EB (β Lyrae-type eclipsing systems) in the constellation of Cygnus registered under the code AAVSO 000-BMD-043, discovered on 30/11/2016. The plot displays the measured data in red (filter V) and the APASS (Photometric All Sky Survey) measurement data in green.

  • Name: UCAC4 627-090198 

  • AAVSO UID: 000-BMD-043 

  • Constellation: Cygnus 

  • J2000.0: 20 05 23.63 +35 20 34.9  (301.34846 +35.34303)

  • B1950.0: 20 03 30.37 +35 11 57.0

  • Galactic coord.: 72.214 +1.923

  • Other names: 2MASS J20052363+3520349, USNO-A2.0 1200-14407558, USNO-B1.0 1253-0392189

  • Mag. range: 14.81 - 15.18 V, secondary minimun 14.90V

  • Epoch: 30 Oct 2016 (HJD 2457692.45) Ephemeris

  • Period: 0.50649 d  (12.156 h)

Star GSC 02678-00305

Variable of type EB (β Lyrae-type eclipsing systems) in the constellation of Cygnus registered with the code AAVSO 000-BMD-308 discovered on 12/12/2016. The measured data with V filter are displayed in red on the plot.

  • Name: GSC 02678-00305 

  • AAVSO UID: 000-BMD-308 

  • Constellation: Cygnus

  • J2000.0: 20 05 34.30 +35 16 53.1  (301.39292 +35.28142)

  • B1950.0: 20 03 40.92 +35 08 14.6

  • Galactic coord.: 72.182 +1.859

  • Other names: 2MASS J20053430+3516531, UCAC4 627-090297, USNO-A2.0 1200-14416378, USNO-B1.0 1252-0385131  

  • Mag. range: 13.16 - 13.48 V

  • Epoch: 14 Nov 2016 (HJD 2457707.4281) 

  • Period: 1.2456 d

Star USNO-A2.0 1425-02885110

Variable of type EB (β Lyrae-type eclipsing systems) in the Perseus constellation registered with the code AAVSO 000-BMN-086 discovered on 24/12/2017. The plot displays the measured data with V filter in red and the ASAS-SN data in green.

  • Variable:               USNO-A2.0 1425-02885110     

  • AAVSO UID:          000-BMN-086 

  • Constellation        Perseus    

  • J2000.0:                 02 04 42.63 +53 57 08.9  (31.17762 +53.95247)    

  • Other name:        2MASS J02044261+5357086    UCAC4 720-018402    USNO-B1.0 1439-0063433

  • Variability type:   EB    

  • Mag. range:         14.19 - 14.82 V    

  • Epoch:                  24 Dec 2017 (HJD 2458112.088)     

  • Period:                 0.838138 d  (20.1153 h)