NGC 1662 (Lund 141, Cr 55) Open Cluster in Orion

Located at: RA 04 hours 48 minutes 29 seconds, Dec +10 degrees 55 minutes 48 seconds

Size: 20' (12') Magnitude: 6.4 Class: II 3 m

North is up

West to the right


 8" f5 Newtonian reflector


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


Lumicon Red filter, 170 minutes (17 x 10 minute subs), 01/19/2009; seeing 2.2-3.4 FWHM per CCDStack


CCDStack 1.4.1, Photoshop 7.0


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


This image replaces my first red-filtered 64 minute Track & Accumulate image from 02/15/2006.

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 12 arc minutes.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 1662

NGC 1662 = Cr 55 = OCL-470 = Lund 141
04 48 29 +10 55.8
V = 6.4;  Size 20

17.5": striking group of ~40 stars within 15' including a number of mag 9 stars.  
Many of the brighter stars are arranged in a "boat" shape with the bottom of the 
boat consisting of a string oriented NW-SE.  In the middle is a mast, 
perpendicular to the longer stream of stars.  The "mast" primarily consists of a 
bright quadruple (one with a fainter companion) of mag 8-10 stars (h684) with 
sides less than 1'.  This group may be a scattered group of bright stars.

- by Steve Gottlieb
Alessi 29 is at the Southeastern edge of this field.