Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 3718  ·  NGC 3729
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NGC 3718 & NGC 3729 in Ursa Major, 



    
        

            Steve Milne
NGC 3718 & NGC 3729 in Ursa Major
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Technical card

Imaging telescopes or lenses: TEC-140

Imaging cameras: QSI 690 WSG-8

Mounts: 10 Micron GM2000 HPS II UP

Guiding telescopes or lenses: TEC-140

Guiding cameras: Starlight Xpress Lodestar X2

Focal reducers: TEC Field Flattener

Software: Sequence Generator Pro  ·  Adobe Photoshop 6 CS  ·  Open PHD PHD 2.5  ·  Pixinsight 1.8

Filters: Astrodon Tru-Balance LRGB E-Series Gen 2 Blue  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Green  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Red  ·  Astrodon Tru-Balance LRGB E-Series Gen 2 Luminance


Dates:May 27, 2020

Frames:
Astrodon Tru-Balance LRGB E-Series Gen 2 Blue: 42x300" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Green: 42x300" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Luminance: 41x600" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Red: 42x300" bin 1x1

Integration: 17.3 hours

Avg. Moon age: 4.64 days

Avg. Moon phase: 22.48%


Basic astrometry details

Astrometry.net job: 4195742

RA center: 11h 33' 7"

DEC center: +53° 4' 33"

Pixel scale: 0.479 arcsec/pixel

Orientation: 179.570 degrees

Field radius: 0.314 degrees


Resolution: 3543x3122

Locations: E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Own remote observatory

Remote source: e-EyE Extremadura

Description

NGC 3718 is a spiral galaxy around 52 million light years distant in the constellation of Ursa Major. The arms of the galaxy appear distorted - this is likley due to gravitational interaction with NGC 3729, another spiral galaxy that is around 150,000 light years from NGC 3718. The unusual appearance of NGC 3718 no doubt led to its inclusion as object number 214 in Arp's Atlas of Peculiar Galaxies.

NGC 3718 was photographed between 10 and 27 May 2020 from a rig in Spain that is privately owned and operated by Barry Wilson and me.

Capture details are as follows:

Telescope: TEC 140
Camera: QSI 690
Filters: Astrodon
Mount: 10 Micron GM2000HPS

Lum: 41 x 600s
Red: 42 x 300s
Green 42 x 300s
Blue: 42 x 300s

A total of 17 hours and 20 minutes exposure.

Data: Steve Milne & Barry Wilson
Processing: Steve Milne

This image has been cropped to just a bit more than 50% of the original size, in order to emphasize the galaxy pair.

Comments

Revisions

  • NGC 3718 & NGC 3729 in Ursa Major, 



    
        

            Steve Milne
    Original
  • NGC 3718 & NGC 3729 in Ursa Major, 



    
        

            Steve Milne
    B
  • Final
    NGC 3718 & NGC 3729 in Ursa Major, 



    
        

            Steve Milne
    C

C

Description: Bit more finesse in stars and sky - I hope.

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NGC 3718 & NGC 3729 in Ursa Major, 



    
        

            Steve Milne