ADS 6366 Group (ADS 6366**) Open Cluster* in Canis Major

Located at: RA 07 hours 47 minutes 02 seconds, Dec +00 degrees 01 minutes 05 seconds

Size: 4.5' group; 17.5" / 26.5" star separation Magnitude: 8.32 star Class: Cluster? / Asterism; Triple star

North is up

West to the right

Telescope:

 14.5" f5 Newtonian reflector

Camera:

  ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 210 minutes (21 x 10 minute subs), 03/6/2015; seeing 3.3-5.4 FWHM per CCDStack

Processing:

CCDStack 2.87.5531.19367, Photoshop CS5.1

Location:

 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)

Notes: * I imaged this field (and NGC 4589/4572) around full moon. Unfortunately, the winds (off-shore) appeared, and the seeing deteriorated, even though the skies were clear.

This 'object' (centered) from Sue French's "Deep-Sky Wonders" column in Sky & Telescope. From February 2015, pager56. Also see the "Triple Trapezoid" from the same column.

From "Star Clusters", by Brent Archinal and Steven Hynes; Comments and Aliases: "See notes. Disc. by J. Herschel, 1827. Center and brt. star is triple ADS 6366 (V=8.32, 9.27, 12.33). Alias: (2) ADS 6366.
Notes in part reads: "This is an asterism or possible cluster about the triple star ADS 6366. ** It is important to note that this group is not ADS 6366 itself, but merely contains it ..."
Several more paragraphs of notes follow.

The seeing was too poor to show the Triple star ADS 6366 very well.