LY Delphini / LY Del
Light curve and phase diagram of the EA type eclipsing binary LY Delphini / LY Del.
The following light curve and phase diagram of the eclipsing binary LY Delphini / LY Del were constructed from photometry of 97 images taken with the Open University COAST telescope (a 14 inch f/10 Schmidt Cassegrain) between 2017 July 5 and 2018 January 12. The images were taken using a V filter. (The "1" in the image headers refers to these being from my first set of images taken by COAST.)
Using the phase diagram, the phase of the primary minimum was calculated and from that a primary minimum was calculated to occur at HJD2458113.487+-0.01
I had previously made some visual estimates of this star in 1997 and 1998 using a 10" Newtonian which are included here.
Adding these visual estimates, in red, to the COAST data, in black, results in the following light curve and phase diagram.
Visual estimates can be just as useful as CCD observations!
The catalogue value for the period of this star is 10.3515 d (AAVSO VSX). The GCVS doesn't give a value. [Accessed 2023 August 1]
An article about the discovery of this system by Lloyd et al can be found here.
The catalogue value for the period of this star is 10.3515 d (AAVSO VSX). The GCVS doesn't give a value. [Accessed 2023 August 1]
An article about the discovery of this system by Lloyd et al can be found here.
[This page updated 2023 August 1]