Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  IC 4263  ·  M 51  ·  NGC 5169  ·  NGC 5194  ·  NGC 5195  ·  NGC 5198  ·  NGC 5229  ·  Whirlpool galaxy
M51 - Whirlpool galaxy with a Barn Door Tracker, 



    
        

            alexhollywood
M51 - Whirlpool galaxy with a Barn Door Tracker
Powered byPixInsight

M51 - Whirlpool galaxy with a Barn Door Tracker

M51 - Whirlpool galaxy with a Barn Door Tracker, 



    
        

            alexhollywood
M51 - Whirlpool galaxy with a Barn Door Tracker
Powered byPixInsight

M51 - Whirlpool galaxy with a Barn Door Tracker

Technical card

Imaging telescopes or lenses: Nikkor 70-300 VR II

Imaging cameras: Nikon D5000

Mounts: Selfmade Motorized Barn Door Tracker

Software: photoshop  ·  DeepSkyStacker


Dates:Jan. 3, 2013

Frames: 118x60" ISO800

Integration: 2.0 hours

Darks: ~19

Bias: ~37

Avg. Moon age: 20.46 days

Avg. Moon phase: 67.55%

Mean FWHM: 4.50

Temperature: 5.00


Basic astrometry details

Astrometry.net job: 92832

RA center: 13h 29' 56"

DEC center: +47° 10' 8"

Pixel scale: 3.841 arcsec/pixel

Orientation: 85.469 degrees

Field radius: 1.490 degrees


Resolution: 2324x1549

Description

M51 acquired with the last update to the software of my motorized home-made barn door tracker. this version allows to change the speed of the stepper motor according to the angle between the plates in order to reduce the tangent error of the isosceles mount.

Now it is possible to complete a 120 min track without correction. a maximum exposure of 2 minutes with a 300 mm lens has been experimented with this setup.

Comments

Sky plot

Sky plot

Histogram

M51 - Whirlpool galaxy with a Barn Door Tracker, 



    
        

            alexhollywood