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Variables EA

Eclipsant type β Persei (type EA)

Binary systems with spherical or slightly ellipsoidal components. It is possible to specify, for your light curves, the start and end times of the eclipses. Between eclipses the light remains almost constant or varies insignificantly due to reflection effects, slight ellipsoidity of the components or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to ≥ days. The light amplitudes are also very different and can reach several magnitudes 

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

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Star GSC 03633-01693

Variable type EA (β Persei-type Algol eclipsing systems) in the constellation Lacerta, discovered on 09/01/2017 and registered under the code AAVSO 000-BMD-728. A phase diagram 0-2 from the measurements is shown in red on the plot. The range of magnitude variation of the star is very small, 0.09 magnitudes, most of which (0.07) is attributed to the ellipsoidal variation and only 0.02 magnitudes to the eclipse.

 

  • Name: GSC 03633-01693 

  • AAVSO UID: 000-BMD-728 

  • J2000.0: 22 43 13.99 +51 10 52.6  (340.80829 +51.18128)

  • B1950.0: 22 41 07.80 +50 55 07.6

  • Galactic coord.: 103.360 -6.753

  • Other names: 2MASS J22431399+5110525, UCAC4 706-106408, USNO-A2.0 1350-17205212, USNO-B1.0 1411-0460607  

  • Mag. range: 12.23 - 12.32 V

  • Epoch: 10 Dec 2016 (HJD 2457732.843) 

  • Period: 1.5622 d

  • Eclipse duration: 6%

Star GSC 02903-01551

Variable type EA (β Persei-type Algol eclipsing systems) in the constellation Auriga, discovered on 14/01/2017 and registered under the code AAVSO 000-BMD-763. The plot shows in red a 0-2 phase diagram from the measurements and in green APASS measurements. Some of the APASS data do not match perfectly possibly due to a scatter from a star to the magnitude 15.7 companion at 12" whose data is included in APASS.

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  • Name: GSC 02903-01551 

  • AAVSO UID: 000-BMD-763 

  • Constellation: Auriga Sequence

  • J2000.0: 05 02 46.96 +42 15 52.8  (75.69567 +42.26467)

  • B1950.0: 04 59 14.58 +42 11 37.7

  • Galactic coord.: 164.112 +0.343

  • Other names: 2MASS J05024694+4215528, UCAC4 662-030730, USNO-A2.0 1275-04197394, USNO-B1.0 1322-0144921  

  • Mag. range: 13.71 - 13.98 V

  • Epoch: 25 Dec 2016 (HJD 2457747.6529) 

  • Period0.90110 d  (21.626 h)

  • Eclipse dur.21%

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Star USNO-A2.0 1275-02175692 

Variable type EA (β Persei-type Algol eclipsing systems) in the constellation Auriga, discovered on 16/02/2017 and registered under the code AAVSO 000-BMN-088. The plot shows a 0-2 phase diagram in red from the measurements and ASAS-SN measurements in green.

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  • Variable:                USNO-A2.0 1275-02175692     

  • AAVSO UID:           000-BMN-088      

  • Constellation:       Perseus     

  • J2000.0 :                 03 18 08.06 +42 23 47.3  (49.53358 +42.39647)    

  • Other names:       2MASS J03180805+4223473    UCAC4 662-015503    USNO-B1.0 1323-0078549

  • Variability type:    EA    

  • Mag. range :         13.95 - 14.30 V    

  • Epoch:                   16 Feb 2017 (HJD 2457801.376)     

  • Period:                   1.928268 d

  • Rise/eclipse dur.: 10%

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000-BMN-088.jpg
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