Full Frame

NGC 3521 is a beautiful colourful and glowing galaxy in Leo that is often overlooked by imagers for
the more famous Leo Triplet of galaxies. NGC 3521 has a faint but complex system of billowing outer
star clouds and if you look closely, a deep exposure like this also reveals a very faint extended
halo (out to the right and above the galaxy) with shell structure evident.

Orion Optics AG12 F3.8
Starlightxpress SXVF-H694, SX USB CFW, SX OAG unit + Atlas Focuser
LRGB = 630min 50 60 70min = 13.5hrs total exposure (bin 1X1) Astronomik filters
-20C chip temp, flats used but no dark frames.
Focal length 1120mm
Image scale 0.84"/pix
Guide Camera: Starlightxpress Lodestar

Comments
Taken over 6 nights, mostly clear, no moon, variable seeing

Equipment setup:

http://www.pbase.com/strongmanmike2002/image/151108788/original

Some links to equipment used to take this image:

Orion Optics UK

http://www.orionoptics.co.uk/

StarlightXpress CCD Cameras and imaging equipment

http://www.sxccd.com/products

Finger Lakes Instrumentation CCD cameras:

http://www.flicamera.com/

Astro Shop (Aus)

http://www.astroshop.com.au/

Astro-Elecronic FS2 scope GOTO controller:

http://www.astro-electronic.de/

Gerd Neumann and Astronomik filters:

http://www.astronomik.com/en/home

http://www.gerdneumann.net/

MSB Software & Astroart 5

http://www.msb-astroart.com/

Catseye Collimation

http://www.catseyecollimation.com/

STAR Atlas:PRO planetarium software:

http://www.staratlaspro.com/