Day: 9 June 2026

23:00 – 00:56

Tonight I thought I would continue my testing of the ZWO ASI2600MC Duo camera for performing photometry on T Coronae Borealis, HR 5958, as Wednesday night I realised the Antlia filter was in the imaging train and because even with the filter in, at 1s the maximum the star was, was .1 in green so far from saturated which gives a chance of being able to compare to a mag 2.2 star, Epsilon CrB in the same field of view.

I took 100 x 50ms of TcB, stacked them and this increased the signal to noise which helped. I then downloaded AstroImageJ for the Mac which I will use to perform photometry. Now I just need to learn the software.

22:15 – 01:00

Started work on my first photometry project tonight which I will do with my friend GingerGeek. T Coronae Borealis, which is also known as HR 5958 in that constellation is the target. I have been working on the information provided by the BAA

https://britastro.org/section_news_item/get-set-for-the-next-eruption-of-the-recurrent-nova-t-coronae-borealis

and also from the AVSO

https://www.aavso.org/blog/what-do-during-eruption-t-crb

Both the above have proved useful in understanding both the situation and the comparison star/s to observe too. In my case I will attempt to image T CrB along with Epsilon CrB as this is a non variable mag 2.2 star.

T Coronae Borealis

Tonight I managed to take a few different subs at varying exposures, both to characterise the behaviour of the camera on this Field of View, but also to create an annotated overlay to help pinpoint T CrB on other frames.

After taking exposures ranging from 1s to 300s, the latter being for the annotation, I slewed to the Moon to take my first image through this new Sky-Watcher Esprit 150EDX.

Moon 0.2s single frame