14th AprilMoon Using OIII filter
Supernova in M82
Magnitude recorded as 12.757
A bright Moon (pictured above) introduced errors.
I realised that I had determined the magnitude without adjusting the measuring circle to fit the size of the supernova.
This would have introduced an error.
A recalculation gave the magnitude as 12.928
This time I only used reference stars with magnitudes close to that of the supernova.
I also reworked the data from 14th April.
The magnitude was 13.200
The Moon rose quite late so I grabbed some luminance frames of M101
6x 10 minutes