Well Tony that was a good pick up as I didn't even see that in my quick look at your original animation (but can just make it out now) old eyes I guess!
The 2nd object in your image is MPL 9718 Gerbefremov at mag 17ish.
As you can see in my SkyX screen grab there are lots of Minor Planets in that area at that time.
9718 Gerbefremov - Discovered 1976 Dec. 16 by L. I. Chernykh at the Crimean Astrophysical Observatory.
Gerbert Alexandrovich Efremov (b. 1933), a well-known designer of space technology, created the Proton and Almaz space stations. He is a member of Tsiolkovsky Russian Academy of Cosmonautics and was decorated with the Leonardo da Vinci Medal of the International Association of Peace Foundations.
https://ssd.jpl.nasa.gov/sbdb.cgi?orb=1;sstr=9718
888 Parysatis - Discovered 1918-Feb-02 by Wolf, M. at Heidelberg. This minor planet was named after the Persian Queen Parysatis of the Achaemenid Empire in the 5th century BC. She was the wife of the king Darius II, and the mother of Artaxerxes II of Persia, after whom the asteroid 831 Stateira was named. The naming was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 86).[2]
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=888
Looking at your first image I can also see 6361 Koppel (mag 17ish) just below NGC3627.
The link below will take you to the Minor Planet checker, might be handy. Just put in date, time and RA & Dec, Radius of the search i.e. 60 arc minutes and the limiting magnitude and Produce list and you will get all you need.
https://minorplanetcenter.net//cgi-bin/checkmp.cgi
Very well done indeed! Oh and of course from my interest point that is a nice image of NGC3623 (M65) and yes I did check your image for Supernova and nothing there!