Hemisphere:  Northern  ·  Contains:  NGC 3690
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Colliding Galaxies of Arp 296 and Arp 299, 


Colliding Galaxies of Arp 296 and Arp 299
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Colliding Galaxies of Arp 296 and Arp 299

Technical card

Imaging telescopes or lenses: Celestron c14 EdgeHD Celestron C14

Imaging cameras: SBIG ST-10XME

Mounts: Astro-Physics 900 GTO

Focal reducers: Celestron Reducer 0.7x

Filters: Luminance  ·  Astrodon I-series

Dates:Feb. 14, 2020March 21, 2020

Astrodon I-series: 90x480" bin 2x2
Luminance: 76x600" bin 1x1

Integration: 24.7 hours

Avg. Moon age: 23.77 days

Avg. Moon phase: 36.74%

Basic astrometry details

Astrometry.net job: 3441276

RA center: 11h 28' 33"

DEC center: +58° 33' 43"

Pixel scale: 0.512 arcsec/pixel

Orientation: 226.350 degrees

Field radius: 0.172 degrees

Resolution: 2043x1304

Data source: Backyard


These two sets of interacting galaxies are listed in Halton Arp’s Atlas of Peculiar Galaxies as Arp 296 and Arp 299.

Arp 299 is the larger set at the center of the image and consists of NGC 3690 and IC 694. There are numerous peer-reviewed publications on Arp 299 that discuss regions of powerful starburst activity, as well as eight supernovae detected during 1990 – 2010. An article published in August 2018 reports a possible tidal disruption event (TDE) “produced when a star is ripped apart by the gravitational field of a supermassive black hole (SMBH)”
Arp 299 is approximately 130 million light-years away.

Arp 296 is at the right of center in the image and consists of a quite distinct barred face-on spiral galaxy (PGC 35345) and a less distinct galaxy (PGC 2580146) exhibiting filamentary structure on either side. Arp 296 is much further away than Arp 299 at an approximate distance of 800 million light-years.

I found very few on-line images of this field. The most prominent are a broadband image of Arp 299 from the Hubble telescope as well as hybrid images combining Hubble data with x-ray data from NuSTAR and Chandra. I have found no images that show the broad tail stretching from Arp 299 to the blue star at lower right in my image. The Hubble-based images and others published in professional literature tend to be tightly centered on Arp 299 and do not show the wider field. There are many other galaxies visible within this field.

I hope you enjoy the image!




Sky plot

Sky plot


Colliding Galaxies of Arp 296 and Arp 299,