IN Leonis / IN Leo
IN Leonis is a 'field star' in many of my images of UV Leo and UZ Leo. Exposures were not ideal for IN Leo. At mag 10.1 to 10.5 it is a little fainter than both UV and UZ hence the scatter in the magnitude estimates.
It is catalogued as an RS type variable with a period of 6.217 days (GCVS, AAVSO VSX accessed 2022 September 7).
It is catalogued as an RS type variable with a period of 6.217 days (GCVS, AAVSO VSX accessed 2022 September 7).
The following 'all online observations' light curve consists of results from May 2013 to June 2022. These were from images taken with the Bradford Robotic Telescope Cluster Camera (essentially a 200mm aperture telephoto lens) up to June 2015, and a couple of sessions with the Open University COAST telescope, variously a 14 inch Schmidt Cassegrain and a 17 inch corrected Dall-Kirkham between May 2021 and June 2022.
These following phase diagam is plotted with the catalogue period of 6.217 days.
Notwithstanding the scatter in all the data, there do appear to be more, fainter, points between phases 0 and 0.5 than there are between phases 0.5 and 1.
A number of data sets were also obtained from the 2 inch Titan at Somerby Observatory, also from observations of my target objects UV and UZ Leo. (2017 March 15, 2021 March 29, 2021 April 3, 2021 April 14, 2022 March 3, 2022 April 21.) As stated above, IN Leo is a little faint for the exposures which suit UV and UZ Leo, leading to undesirable scatter. However, this is an under observed system, so at least some data will be obtained.
These are plotted in red in the following light curve and phase diagram, where the above 'online' results have been plotted in black,
These are plotted in red in the following light curve and phase diagram, where the above 'online' results have been plotted in black,
Close up of the 2021/2022 light curve;
Here, the Somerby observations also appear to possibly show a similar trend to fainter magnitudes between phases 0 and 0.5 than between phases 0.5 and 1.
IN Leo is not an easy object to observe with the COAST system, given the small field of view and lack of available comparisons of suitable magnitudes, leading to 'noisy' data. It has therefore been dropped from my program.
The ASAS3 light curve and phase diagram can be viewed here.
[ This page updated 2022 September 7 ]