V716 Centaurus (HD124195)

Aim of the campaign

V716 Centaurus is an early-type semidetached binary system which has been very poorly observed. The initial aim is to determine accurate Time of Minimum for several primary and secondary eclipses. We will repeat TOM measurements each season in order to accurately determine the period.

 

{tab Data}

STAR Max V Mag RA 2000 BRNO epoch (HJD) BRNO period Primary / secondary
V716 Cen 5.96 14h13m39.8s 2438524.4069 1.490096 p
           
  Min V Mag DEC 2000 Krakow  epoch (HJD) Krakow period  
  6.52 -54°37′ 32″ 2452501.4920 1.4900943  
           

Recent data: 2455746.91026 (0.00012) TOM for primary eclipse (M. Blackford)

 

{tab Light Curve}

v716 cen light curve

From Bakis, H., Bakis, V., Demerican, O. And Eker, Z., Mon. Not. R. Astron. Soc. 385, 381-390 (2008).

 

{tab Observing}

No bright field stars close enough to interfere with measurements.

 

{tab Finder Chart}

The field of V716 Cen is shown in the plot below.

v716 cen finder chart

 

{tab Comparison Star Data}

Please use the four comparison stars labled on the chart and catalogue values listed below.

Comp Star Name RA J2000) DEC (J2000) V B-V V-Rc
1 HD121336 13 56 19.95 -54 07 56.7 6.150 0.060 -0.073
2 HD124812 14 17 25.52 -55 45 54.5 6.625 0.188 0.144
3 HD125287 14 20 14.23 -55 47 29.0 7.086 0.938 0.452
4 HD125669 14 22 43.21 -55 25 52.1 7.216 0.070 -0.050

 

{tab Preliminary Results}

The plot below shows a primary minimum observed by Mark Blackford at HJD 2455746.91026 (0.00012) as determined using PERANSO which is roughly 38 minutes earlier than the BRNO prediction and 10 minutes earlier than the Krakow prediction.

v716 cen prelim results

{/tabs}

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