Canes Venatici, Arp 23, 193, 269, Hick 68, M94, M3

[Mike JW]

I have visited C.Vn a few times of late so here is a collection of results. C9/Ultrastrar Mono

M3 - enough said, but I do like to visit a globular - would love to be on a planet in the middle of that lot until I think about the gravitational chaos there must in a globular.

3 x 5sec subs.

 

M94 - AKB's post on April 2nd inspired me to take a look and take a step of faith to see the ring.

6 x 15 sec subs

 

Hickson 68

A (NGC 5353) and B (NGC 5354) , both lenticular galaxies, are the two close together and interacting?  C (NGC 5350)  is the lovely barred spiral to the right of them. Circled at the top are NGC 5358 (spiral) on the left and NGC 5355 (lenticular). Circled to the right of 5353/5354 is PGC 99754.

11 x 15 sec subs.

 

Arp 23 NGC 4618.  This is classed by Arp as a One Armed Spiral. Clearly seen is its central bar. Just sneaking into view is NGC 4625, also a one armed spiral but not noted in the Arp list.

 

 

ARP 193 IC 883. It is a merger remnant. Arp classified it as a  galaxy with narrow filaments. Pleased to have picked up the two filaments. A very peculiar galaxy. 

20 x 10 sec subs,

 

Arp 269. NGC 4485 and 4490. Classed by Arp as having connected arms. I have not picked up a connecting arm. NGC 4490 is the big galaxy, known as the Cocoon Galaxy. The near collision has distorted it and fired up much star formation.

4 x 10 sec subs.

 

I have had some fun and pleasure wandering about in C. Vn.  There are 14 Arps in total in this constellation.

 

Mike

[Martin Meredith]

Impressive collection of Arps! CVn is a great area of the sky.  

Are you going to hunt them all down? Perhaps between all of us on SGL we can cover the entire catalogue. Certainly there is so much in there to merit a sustained effort.

BTW were you binning on the last few?

Martin

[Mike JW]

Hi Martin,

Thank you for the feedback. Please always free to make suggestions to improve any posting I do or further objects to explore. Arps in CVn - yes I have hunted them all down and many others but as you know from previous postings, since joining the forum I have learnt much, so I shall gradually plod my way back through them to improve them and tease out more detail.

As to binning. All the above shots were at 1x1. Often I do use 2x2 binning (probably most of the time) but for the above the conditions were very good and I wanted to maximise resolution. I also tend to use the median 3x3 bypass to get rid of noise and give a slightly softer view that reminds me of my visual days with a large Dob.

Mike