Contains: M 1, Crab nebula, NGC 1952
Getting plate-solving status, please wait...

Technical card

Resolution: 1940x1404

Dates: Jan. 8, 2018

Frames: ZWO LRGB Filters: 750x7" (gain: 0.75) -20C bin 1x1

Integration: 1.5 hours

Avg. Moon age: 21.72 days

Avg. Moon phase: 54.59%

Bortle Dark-Sky Scale: 4.00

Temperature: -4.00 job: 1955700

RA center: 83.635 degrees

DEC center: 22.017 degrees

Pixel scale: 0.412 arcsec/pixel

Orientation: 301.965 degrees

Field radius: 0.137 degrees

Locations: Home Observatory, Budy Dłutowskie , Pabianice, Poland


Finally after one month of waiting I get colour signal for my Messier 1 photo (Crab Nebula)

A few words about the object - it is a supernova remnant observed in 1054. It is located in the constellation of Taurus and it is quite bright (8,5 mag) but it also has a not so bight surface brightness due to quite big size on sky (angular size).

Central point of nebula is pulsar - neutron star rotating with enourmus speed 30x per second. It has only 10km (!) of diameter but mass equal 0,6 mass of the Sun - so it has great density and enourmus brightness.

I saw that in this object it is very good to use Ha+LRGB composition. I don't Ha filter so I used signal from red filter instead.

It is a scale of 0,41 '' / pix.
Photo without resize - just a little crop to remove ampglow.

Newton 250/1250 on NEQ-6 + ASI 180MM-C + Baader LRGB
Composition R+LRGB
L - 750 x 7s (gain 75%)
RGB-100 x 10 s (gain 75 %) per channel

Two versions - full and crop on nebula



Łukasz Sujka



less red colour :)


Final processing with focus on stars


Stars adjustment

Sky plot

Sky plot


M1 - Crab Nebula, 


        Łukasz Sujka