NGC 2394 (n/a) Open Cluster in Canis Minor

Located at: RA 07 hours 28 minutes 37 seconds, Dec +07 degrees 05 minutes 12 seconds

Size: ~15' x 5' Magnitude: -- Class: Sparse group

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, 160 minutes (32 x 5 minute subs), 01/26/2018; seeing 4.1-6.4 FWHM per CCDStack

Processing: CCDStack 2.94.6355.18107, Photoshop CS5.1
Location:

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

Notes:

Tried for another one-night object ... Snuck this one in before winds get to strong for imaging. Unfortunately, the seeing was bad all night, even with 5 minute subs.

This grouping of stars has been listed as a non-existent NGC object, however:

From the NGC / IC Project:

NGC 2394

07 28 37 +07 05 12

18" (3/13/04): at 115x, appears as a 15'x5' scattered group of roughly two dozen stars, extended E-W.  Includes a about a dozen mag 10-11 stars.  The stars appear to be arranged in a zig-zag chain which is fairly distinctive.  Additional stars are scattered to the north and south of this string.   But NGC 2394 may be just a random grouping.  Located just 10' NE of Eta CMi (V = 5.3) in the same field!

William Herschel discovered NGC 2394 = H VIII-44 on 28 Dec 1785 (sweep 496) and noted "A cluster of very coarse scattered large stars, they form a cross and extend over a large space; not rich."  There were no observations made by JH or at Birr Castle.  Based on Heidelberg plates, Karl Reinmuth described NGC 2394 as "a very loose clustering of pB st, bet BD+7d1729 and BD+7d1739."  There are about 15 fairly bright mag 10-11 stars in the vicinity.  RNGC classifies this number as nonexistent (Type 7).

... and from the CDS image/data.

... and from "Star Clusters", by Brent Archinal and Steven Hynes. cl??; Comments and Aliases: "Skiff: Sparse group."