Shakhbazian Compact Galaxy Groups observing notes

Hey deep sky hounds,

Some of you are aware that I'm working on the new revision of my Shk observing guide. New groups, enhancements, etc.

I looked back at my notes and I was shocked that I observed 58 of of the Shk groups, which was most of my original version of my Shk guide (current online version). I decided to put all of my observing notes in one place available here. Whenever I get back out under dark skies, I hope to add to this list as I observe more Shk groups.

Let me know your thoughts and I hope to encourage you to go out and observe these isolated and distant groups.

The updated guide will be made available when I'm finished working on it.

Alvin

Hi all y'all,

Here is the near final draft of the Shk Group observing guide. Take a look and let me know what you think.

Shk Groups guide

The revisions are as follows (copied/pasted) from my revision history

• Added 59 additional groups (Shk 2, 4, 7, 8, 10, 17, 18, 20, 27, 31, 32, 39, 43, 51, 55, 57, 67, 74, 82, 83, 95, 104, 105, 113, 119, 120, 123, 138, 131, 135, 181, 182, 186, 188, 212, 218, 220, 223, 244, 245, 253, 254, 257, 266, 278, 282, 285, 330, 344, 345, 346, 348, 350, 351, 355, 358, 359, 371, and 376).
• Deleted Shk 21.
• Added link to full Shakhbazian list.
• Added Coefficient of Compactness (Cmpt) to give an idea how dense the group is.
• Updated data throughout.

o Corrected RA and Dec to the center of the group. Some of the RA/Dec in the original papers were not accurate.

o Updated Mag using NED, SDSS and D. Stoll’s figures.

o Updated the number of members (#) with D. Stoll’s figures.

• Added SDSS inserts with marked members for most groups.
• Updated bibliographic data.
• Minor refresh throughout.

Just uploaded v2 of the Shk Guide. The link to the draft version is now offline.

Available here.

Regarding my other guides, if you have any feedback or ideas of objects to add, etc. Please post here or DM me directly. I'm trying to keep the guides accurate and useful for the deep sky community.

Edit (May 4, 2024): I got around to label all of the inset photos with numbered labels based on D. Stoll's journal articles... Also corrected more than a few typos in the # of members columns. I say more tan a few, about 7-8 had typos. Sorry about that. New version online.

Many thanks for your continuing dedication!!!