V3288 Ophiuchi / V3288 Oph
As of 2023 December 7, the GCVS classifies this variable as an L type variable with no period given, while the AAVSO VSX classifies it as an EA+ZAND type with a period of 704 days. (The star had previously been catalogued as NSV 10028.)
The following light curve and phase diagrams were constructed from photometry of images taken with two different systems, the Open University 14 inch Schmidt-Cassegrain COAST MkII telescope prior to 2021 July 8, and subsequently with the replacement COAST Mk III telescope, a 17 inch/42 cm aperture CDK17 Corrected Dall-Kirkham. All images used a V filter, and all photometry used the same comparison and check stars.
The new observations, taken between 2023 February 13 and 2023 November 20, are shown in blue. The light curve of the check star is shown in red.
The following light curve and phase diagrams were constructed from photometry of images taken with two different systems, the Open University 14 inch Schmidt-Cassegrain COAST MkII telescope prior to 2021 July 8, and subsequently with the replacement COAST Mk III telescope, a 17 inch/42 cm aperture CDK17 Corrected Dall-Kirkham. All images used a V filter, and all photometry used the same comparison and check stars.
The new observations, taken between 2023 February 13 and 2023 November 20, are shown in blue. The light curve of the check star is shown in red.
As previously stated, the 704 day period appears to have little relevance to this particular light curve, as is demonstrated in the 'phase diagram' below.
For easier viewing, the light curve has been stretched out (below) which might suggest a possible periodicity of very approximately 200 days or so, but this is not consistent throughout the whole of the light curve.
The light curve generated from the above observations would suggest a Z And type but without a 704 day periodicity.
Also, there is a suggestion of variation in the maximum magnitude with a possible period of very approximately 1500 days - assuming it is actually periodic. This is consistent with the behaviour of Z And variables.
This system remains in my current observation program to see if this is the case.
[This page updated 2023 December 7]
Also, there is a suggestion of variation in the maximum magnitude with a possible period of very approximately 1500 days - assuming it is actually periodic. This is consistent with the behaviour of Z And variables.
This system remains in my current observation program to see if this is the case.
[This page updated 2023 December 7]