Herschel 400 Objects

NGC 7790: Open Star Cluster (Cassiopeia) RA: 23h 58.4m / DEC: +61° 12'.5
Instrument: 10-inch Starfinder

This interesting little star cluster resides in western Cassiopeia. You'll find it about 2.5 degrees northwest of Caph, a 2.3 magnitude star marking the western extent of the W-asterism which defines the constellation. The sketch at left presents a 190X view in the 10-inch Meade Starfinder equatorial Newtonian. And the star cluster fills nearly the entire 20' diameter field. At the heart of NGC 7790, is a tightly knit collection of 11th through 13th magnitude stars spread across an area roughly 4'x2'.5 in size. The delicate glow of numerous unresolved stars shrouds this central gathering in a misty haze. Among the 22 additional stars in my drawing, the brightest chimes in at a scant 10.3 magnitude. While in the area, don't miss the spectacular NGC 7789, the White Rose cluster, 4.5 degrees due south of NGC 7790.

NGC 7789-White Rose NGC 7814


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Revised: January 26, 2003 [WDF]