----- Original Message -----
From: "Peter Vasey" <petevasey@...>
To: "QSI-CCD" <
[email protected]>
Sent: Saturday, May 20, 2023 4:22:27 PM
Subject: [QSI-CCD] Clusters and trails
Hi, guys,
I don't often post on our forum, but thought you might find this
interesting, unless of course you've seen my thread on Stargazers Lounge.
In 2020 I imaged the nice grouping of Messier 53 and NGC 5053 using my
QSI683 and TMB105 (650 mm fl). Last Summer I bought a SharpStar 140
refractor to replace my Meade 127 - pure self indulgence! And very nice
it is too. With the poor season I've been having this year, I wanted to
try something in Astronomical twilight, and found the two clusters would
still nicely fit in the field of view. So went for it on the evening of
15 May. Unbinned so 10 minute subs to get reasonably deep. And in the
end it came out quite well. Luminance 8 x 10 mins, RGB each 4 x 10 mins.
BUT it needed a huge amount of work to get a decent looking image
because when I counted them up in the individual sub frames there was a
total of 54 satellite trails in 20 subs, the worst individual sub
containing 7 trails!
So I've also attached a summed image of all the subs, showing most of
the trails although some of the fainter ones are lost. I should point
out that my 2020 subs only contained 2 trails in all. An awful lot of
new stuff up there :-( I hope Mr Musk's ears are burning!
Cheers,
Peter.
--
Approx. 55 deg N, 2 deg W (Northumberland, UK)
