NGC 6866

Step 1

Move mouse over sketch to view the impression this cluster left on me.

Observation Notes:

Passing high cirrus gave me grief during this observation. Giselle and some other kids in the neighborhood hollered as Perseid meteors streaked across the sky. After plotting 34 framework stars, I had to restart the sketch when the EQ mount ran aground against a tripod leg. I couldn’t reorient myself well enough after re-centering on the other side of the tripod to pick up where I left off. So I started over.

My first impression of this cluster at high power was of a soaring bird due to some strings of stars extending east and west with the head to the south. The body of the cluster is arranged in the shape of an arc concave to the west. It appeared to be about 5 arc minutes north to south, and about 3 arc minutes east to west. The sketch shows 19 stars in the body of the cluster and 73 stars in total.

Object Information:

NGC 6866 was discovered by F.W. Herschel in 1790. It is also catalogued as Cr 412, Mel 229, Lund 917, OCL 183, H VII-59, h 2066, GC 4544

Subject NGC 6866
Classification Open Cluster (II 2 r)
Position Cygnus [RA: 20:03:55.1 / Dec: +44:09:33]*
Size* 6′
Brightness* 7.6 bMag
Date/Time August 12, 2007 – 10:00 PM MST (August 13, 2007 – 05:00 UT)
Observing Loc. Flagstaff, AZ – Home
Instrument Orion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag. 10 mm Sirius Plössl (120X)
Conditions Partly cloudy, calm, some passing high clouds
Seeing 4/10 Pickering
Transparency ~ Mag 5.8 NELM

* Based on published data.

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