Hemisphere:  Southern  ·  Contains:  Antennae  ·  Antennae Galaxies  ·  NGC 4038  ·  NGC 4039  ·  NGC4038  ·  NGC4039
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NGC4038 - Antennae Galaxies, 


            Rodney Watters

NGC4038 - Antennae Galaxies

Technical card

Imaging telescopes or lenses: Tak TSA120

Imaging cameras: QSI 683 ws-8

Mounts: EQ8

Guiding telescopes or lenses: Tak TSA120

Guiding cameras: Starlight Xpress Lodestar x2

Focal reducers: Takahashi TOA Reducer .75x

Software: Pixinsight 1.8  ·  Sequence Generator Pro

Filters: Astronomik Red  ·  Green  ·  Blue

Dates:March 19, 2020March 21, 2020March 22, 2020

Astronomik Blue: 61x600" -20C bin 1x1
Astronomik Green: 68x600" -20C bin 1x1
Astronomik Red: 66x600" -20C bin 1x1

Integration: 32.5 hours

Darks: ~50

Flats: ~50

Bias: ~100

Avg. Moon age: 26.63 days

Avg. Moon phase: 10.40%

Astrometry.net job: 3541483

RA center: 12h 1' 54"

DEC center: -18° 52' 56"

Pixel scale: 1.317 arcsec/pixel

Orientation: -87.201 degrees

Field radius: 0.489 degrees

Resolution: 2042x1727

Locations: Glanmire Home Observatory, Bathurst, NSW, Australia

Data source: Backyard


A visually very attractive pair of interacting galaxies in the constellation of Corvus (the Crow) approximately 45-65 Million light years from Earth. They make for an impressive pair of cosmic collaborators locked in an eternal embrace.

A number of challenges presented themselves during the data capture for this object with pesky reflections caused by the light from a nearby mag 5 star and very ugly seeing. In the end I trashed all of the luminance data as the stars were too bloated though it is clear that the image didn't really need it.

Capturing an object such as this with a 5" scope and a 1.5 degree field of view requires some dedication particularly given the dynamic range spread between the core of the galaxies and the faint outer arms. To allow for this, 10 minute subs were used and at least 60 subs per colour channel were taken to improve signal to noise ratio.



Rodney Watters
License: None (All rights reserved)


    NGC4038 - Antennae Galaxies, 


            Rodney Watters
  • Final
    NGC4038 - Antennae Galaxies, 


            Rodney Watters


Description: Implemented some very tiny additional sharpening to the final image.

Sky plot

Sky plot


NGC4038 - Antennae Galaxies, 


            Rodney Watters

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