The crescent Moon was an inviting target:
While nova hunting in M31 I detected a very 'starlike' object on the second image that was not visible on the first.
Surprisingly it was on the third image but much fainter. The object faded on each subsequent image until it was undetectable.
The reference image shows a faint mag 19.8 star.
The 2nd image:
The 3rd image:
The 5th image (image 4 was ruined)
Simbad records a 'Dwarf nova' at this location - link.
Patrick Schmeer on Facebook found this AAVSO record for Rosino 66 - link.
The object is a 'flare star' in our galaxy.
It has the same coordinates as a known recurrent nova in M31.
M31N 1966-08a, M31N 1968-10c
This animation shows the flare star near the centre of the image:
I contacted Kamil Hornoch and Allen Shafter and an ATEL was posted:
Allen Shafter at the San Diego State University has a special interest in novae, and particularly extragalactic novae,
so this observation was of value, giving additional proof that the earlier outbursts were not novae, as was first thought.
Earlier today a transient was spotted in Monoceros:
R.A. 06h37m32.99s, Decl. -09°35'42.0" (J2000.0) 2019 Feb. 21.4516 UT,
10.4 mag (CCD, unfiltered) Discoverer: Shizuo Kaneko
My coordinates RA 06 37 32.99 Dec -09 35 42.05
Magnitude by Astrometrica = 10.18
The Moon was about to rise so I took a quick LRGB of M42.
All channels 3x120 seconds
10x600 seconds Crab Nebula M1
There were 3 asteroids in the area:
Two were off the edge of the frame.
Top image has two, a rather faint one a bit above the easy one to see: