M81 and M82 the night of January 5th

Image of 3hrs and 38m taken in subs of 1 and 2 minutes.

Esprit 120, ASI2600MC Gain 100, F7, EQ8 ; stacked in AstroPixelProcessor and developed in Photoshop.

The sky was very foggy, sqm around 20,15.

When scanning for little galaxies, several very small galaxies were identified using SIMBAD at apparent magnitudes below 20. As an example:

2MASS J09533544+6908169Type: IR<10um
Mag: 20.62

M81 and M82 on January 5th (first processing)

Second processing
Third processing

Final M81 and M82

A final processing of M81 and M82. This includes over 20 hours of RGBHa data, taken on different nights in March and April with the Esprit 120mm and the ASI183MM. I found 300 second subs at gain 111 would burn out most stars, leaving no color information anymore. Therefore I used the 300s subs as luminance channel, but in APP using only 50% of it’s luminosity (RGB Tool). On additional nights I captured 120s subs RGB with Gain 111. That’s still a high gain for the ASI183MM, resulting in burned stars, loosing there color, but somehow managed to get that processed in the right direction. The H-Alfa channel was obtained by 600 second-subs at gain 200 (35).