Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's nebulae  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
M81 M82 and IFN by RC8 and D7000m, 



    
        

            Ray Liao
M81 M82 and IFN by RC8 and D7000m
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M81 M82 and IFN by RC8 and D7000m

M81 M82 and IFN by RC8 and D7000m, 



    
        

            Ray Liao
M81 M82 and IFN by RC8 and D7000m
Powered byPixInsight

M81 M82 and IFN by RC8 and D7000m

Technical card

Imaging telescopes or lenses: GSO RC8

Imaging cameras: Nikon D7000 mono

Mounts: SkyWatcher AZ-EQ6 GT

Focal reducers: Astro-Physics CCDT67


Dates:Jan. 15, 2015

Frames: 192x300" (16h)

Integration: 16h

Avg. Moon age: 24.13 days

Avg. Moon phase: 29.54%


Basic astrometry details

Astrometry.net job: 2508597

RA center: 9h 55' 40"

DEC center: +69° 17' 56"

Pixel scale: 1.839 arcsec/pixel

Orientation: 89.703 degrees

Field radius: 0.706 degrees


Resolution: 2299x1533

Data source: Traveller

Description

This is a memorial to old days, when I was using my D7000 (modified to Mono by myself) and w/o a lot things (CCD, OAG, remote control). Those days are tough, especially in the winter of Beijing, -10 degrees and hevy wind.

Went suburb of Beijing four times to finish this picture, and was glad to see IFN there.

Ha: 2 hours;
Lum: 8 hours;
RGB: 6 hours;

Comments

Sky plot

Sky plot

Histogram

M81 M82 and IFN by RC8 and D7000m, 



    
        

            Ray Liao

In these public groups

China Lijiang Gemini Observatory