Open Cluster’s NGC 752, NGC 7243, and NGC 7789

NGC 752 – Open Cluster in Andromeda

Date: October 27th 1994 – Location:  North Carolina Foothills

Conditions:  Poor; NELM 4.5 – Telescope: 10-inch f/4.5 reflector – Magnification: 20mm Erfle EP @ 57x FOV: 1º

Notes: Naked eye object with a dark sky. A very large open cluster easily fills a 1º eyepiece field of view. Approximately 75 or more stars could be counted. Two prominent bright stars, one being yellow and the other reddish or rust lies to the SSW. This cluster is mostly irregularly round with many chains of stars crossing throughout.

NGC 7243 – Open Cluster in Lacerta Date: September 30th 1994 – Location:  North Carolina Foothills

Conditions:  Fair; NELM 5.0 – Telescope: 10-inch f/4.5 reflector – Magnification: 20mm Erfle EP @ 57x FOV: 1º

Notes: Very irregularly shaped, fairly loose open cluster. Double star Struve 2890 with both stars at mag 8.5 lies in the center. A dark lane crosses the central region.

NGC 7789 – Open Cluster in Cassiopeia – Date: December 20th 1994 – Location:  North Carolina Foothills 

Conditions:  Good; NELM 5.5; Telescope: 10-inch f/4.5 reflector; Magnification: 16mm University Optics Konig EP @ 71x and FOV:  0.92º

Notes:  Circular chains or patterns of stars. This cluster is large, very rich and condensed. Beautiful and refreshing after looking at faint objects.

Roger Ivester

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