Hemisphere:  Southern  ·  Constellation: Leo (Leo)  ·  Contains:  NGC 3521
NGC 3521, 



    
        

            Bruce
NGC 3521
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NGC 3521, 



    
        

            Bruce
NGC 3521
Powered byPixInsight

Technical card

Imaging telescopes or lenses: Vixen VC 200L

Imaging cameras: Atik 460 EX

Mounts: Astro-Physics Mach1AP GTO with GTOCP3

Guiding telescopes or lenses: Astro-Tech AT65EDQ

Guiding cameras: ASI 120MC

Focal reducers: Vixen Focal Reducer 0.71x

Software: PHD guiding  ·  SequenceGeneratorPro  ·  photoshop  ·  Pleiades Astrophoto PixInsight 1.8 Ripley  ·  Stellarium  ·  CCDStack 2+

Filters: Astrodon Tru-Balance Generation 2 LRGB

Accessory: Atik EFW2



Basic astrometry details

Astrometry.net job: 761485

RA center: 11h 5' 48"

DEC center: -0° 1' 51"

Orientation: -88.341 degrees

Field radius: 0.318 degrees


Resolution: 2000x1558

Locations: Meadowlark Ridge Observatory, New Glarus, Wisconsin, United States

Description

NGC 3521 resides in relative solitude, approximately 35 million light years from earth, between the constellations of Leo, Virgo and Hydra. The arms of this beautiful galaxy are somewhat irregular and discontinuous and as such is categorized as a flocculent spiral galaxy.

Perhaps the most intriguing aspect is the gas bubble evident around the galaxy. It is theorized that this gas shell is likely tidal debris – remnants of stars torn from satellite galaxies that merged with NGC 3521. Due to this gaseous shell it is sometimes referred to as the “Bubble Galaxy”.

The fact that Charles Messier did not discover this galaxy remains somewhat of a mystery as it is brighter than several he did discover in nearby Leo. William Herschel is credited with its discovery in 1784.

Exposure: L = 30 x 360s and 14 x 600s (total 5h 20m) RGB: 9 x 360s each bin 2x2.

Revision B: At the suggestion of others I have included more of the faint shell, or halo, around the galaxy. My apologies but in this case I believe the revisions really improved the image. Thanks to those that suggested it.

Comments

Revisions

  • NGC 3521, 



    
        

            Bruce
    Original
  • Final
    NGC 3521, 



    
        

            Bruce
    B

Sky plot

Sky plot

Histogram

NGC 3521, 



    
        

            Bruce