Category Archives: ARP Object

ARP 37 (Messier 77) in the Constellation Cetus

Messier 77, also known as ARP 37 (#37 in Arp’s Catalog Of Peculiar Galaxies and NGC 1068 in the New General Catalogue) is a barred spiral galaxy about 47 million light-years away in the constellation Cetus. M77 is the first galaxy in the Arp catalog listed as a low surface brightness galaxy with companions on the arms.

ARP 37 (Messier 77) in the Constellation Cetus

The second image has been over processed in an attempt to bring out additional details in the arms of the galaxy – you can see some of the bright condensation areas around the core.

ARP 37 (Messier 77) in the Constellation Cetus

Tech Specs: Meade 12” LX90, Celestron CGEM-DX mount, Canon 6D stock camera, ISO 3200, 88 x 60 seconds using Backyard EOS with darks and bias frames, guided using a Canon 100mm lens with an attached ZWO ASI290MC camera. Image Date: November 20+21, 2017. Location: The Dark Side Observatory in Weatherly, PA.

Some additional info:

…Tom

ARP 229 (NGC 507 + 508) Concentric Ring Class Galaxy

This is another galaxy from the Arp Atlas of Peculiar Galaxies, it contains NGC 507 and NGC 508 and are listed due to NGC 507 having “concentric rings” that I sure can’t make out. They are listed in the Arp Catalog as ARP 229. I’ve included labeled and unlabeled views.

ARP 229 (NGC 507 + 508) Concentric Ring Class Galaxy (with labels)

ARP 229 (NGC 507 + 508) Concentric Ring Class Galaxy


Tech Specs: Meade 12” LX90, Celestron CGEM-DX mount, Canon 6D stock camera, ISO 3200, 44 x 60 seconds using Backyard EOS with darks and bias frames, guided using a Canon 100mm lens with an attached ZWO ASI290MC camera. Image Date: October 17, 2017 and November 8, 2017. Location: The Dark Side Observatory in Weatherly, PA.

Clear skies!

…Tom

ARP 212 (NGC 7625) Irregular Galaxy in Pegasus

Here is another galaxy from the Arp Atlas of Peculiar Galaxies designated as ARP 212 (also known as NGC 7625). You can just start to make out some of the strange dust lanes in the galaxy in my 59-minute exposure.

Tech Specs: Meade 12” LX90, Celestron CGEM-DX mount, Canon 6D stock camera, ISO 3200, 59 x 60 seconds using Backyard EOS with darks and bias frames, guided using a Canon 100mm lens with an attached ZWO ASI290MC camera. Image Date: October 18, 2017. Location: The Dark Side Observatory in Weatherly, PA.

Clear skies!

…Tom

ARP 284 a Galactic Merger in Pisces

Here is a pair of galaxies from the Arp Atlas of Peculiar Galaxies, this one designated ARP 284 and showing the results of NGC 7714 and NGC 7715 interacting with each other causing a violent and dramatic change in both galaxy shapes. You can see the bridge of stars allowing material to transfer from the smaller galaxy to the larger one. The magnitudes of these galaxies are listed as 13 and 15 in the seds.org database.

ARP 284 a Galactic Merger in Pisces

Tech Specs: Meade 12” LX90, Celestron CGEM-DX mount, Canon 6D stock camera, ISO 3200, 39 x 60 seconds using Backyard EOS with darks and bias frames, guided using a Canon 100mm lens with an attached ZWO ASI290MC camera. Image Date: November 20 and 21, 2017. Location: The Dark Side Observatory in Weatherly, PA.

Clear skies!

…Tom

Galaxy NGC 7678 (ARP 28) in Pegasus

Here is an interesting galaxy in the constellation Pegasus known as NGC 7678 and also appears in the ARP Atlas of Peculiar Galaxies as ARP 28. It has a listed magnitude of 12.4  galaxy and a distance of about 184 million light years. You can see how one of the arms in the galaxy is very heavy, earning it a place by H. Arp in his noted work.

Galaxy NGC 7678 (ARP 28) in Pegasus

Tech Specs: Meade 12” LX90, Celestron CGEM-DX mount, Canon 6D stock camera, ISO 2500, 53 x 60 seconds using Backyard EOS with dark and bias frames, guided using a Canon 100mm lens with an attached ZWO ASI290MC camera. Image Dates: October 17 and November 8, 2017. Location: The Dark Side Observatory in Weatherly, PA.

Clear skies!

…Tom

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