November 9, 2018: First M31 with APM 80mm

[michael.h.f.wilkinson]

Managed only 1 h of data with the APM 80mm F/6 and Tele-Vue TRF-2008 0.8x reducer. Guiding was not good on the EQ3-2, so I used 60 60s subs. Used 60 darks and flats, but fogot to use the bad pixel map I have for my EOS 550 D. Not bad for so little data and rather hazy suburban skies.

I am restacking the data with the bad pixel map, and will try to get he colour better. I also got one or two frames with comet 64P/Swift-Gehrels in it, which I will process tomorrow.

[tooth_dr]

Yes that is very very good for just an hour from your location. 

[michael.h.f.wilkinson]

Reprocess, using median stacking rather than average, to get rid of hot pixels not removed by my older bad pixel map. I will make a new one, and new darks and flats to get rid of them. Quite noisy, but that is to be expected, but I am happier with the colour.

[SamAndrew]

Colour balance is off on the 2nd image, need to bring up the red values to match the green and blue then it will be spot on

[michael.h.f.wilkinson]

1 hour ago, SamAndrew said:

Colour balance is off on the 2nd image, need to bring up the red values to match the green and blue then it will be spot on

The top has too much red, the bottom too little, it is difficult to get this balance right with so little data, I find. Much also depends on monitor calibration.