Images on this post were made by using the TEC140 and Celestron C925 SCT telescopes with my ASI174M mono camera. From my backyard in Nottingham on the evening of 25th March 2021 with the Moon high to the south in Leo at a phase of 86% waxing (i.e. growing towards full moon) and at an altitude of about 50 degrees above the horizon. A slightly hazy sky made for quite good seeing although it was very cold and windy and the moon was jiggling about a lot in the gusts, even inside my sheltered observatory. I had to try and time my capture runs between these gusts and passing clouds, a process that was not always successful. As a consequence I accumulated nearly 600G data for these four pictures in total, much of which had to be deleted. I was outside at the scope for about 90 minutes doing these…

A selection of four images I took with my two main telescopes on the evening of the 24th March 2021 with The Moon at 78% waxing gibbous phase to the South in the constellation of Leo.First up below is a main disk taken with TEC140 refractor.  I shot RGB through those filters on my ASI174M camera and I took the luminance through a 7nm Ha filter.  My field of view with the TEC140 and this camera is only half the disk and so I have to take sequence runs, one for the north and the other for the south and then combine them in Photoshop.  Lunar Disk I then moved on to use my C925 SCT telescope again using the ASI174M in RGB mode.  I did not capture a specific luminance channel this time and just used RGB and made a pseudo-luminance.  The weather conditions were too windy to get…