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Type: open cluster
Mag: B=?, V=?
NGC 6682. Bigourdan was the first to notice that JH's RA is 2 minutes too large. Alister Ling picked up the error independently a century later. With an additional small correction in Dec (about 3 arcmin to the south), JH's "A large, pretty rich cluster of straggling stars..." is found to be located in a Milky Way star cloud. The remainder of his description "... having a vacuity in the middle and broken into 2 or 3 clusters. Fills field. 70 or 80 stars of all magnitudes from 10 to 18 counted. Extended in parallel. The most compressed part following," is appropriate.
This open cluster was catalogued by Sir John Herschel and described as large, rich and composed of stars from 10th to 18th magnitude. In the RNGC it is called "non-existent", meaning that it was not visible on the plates of the POSS.
The RNGC (Sulentic and Tifft 1973) notes that this is a nonexistent object. Their coded description reads NO CL DC.
Steve Coe, observing with a 17.5" f/4.5 at 100X, notes: "Pretty small, pretty compressed. 30 pretty faint stars, needs 135X to determine cluster nature, otherwise it is just a bright spot in Scutum Star Cloud.
Walter Scott Houston notes that he could not find it with his 4" and 5" refractors, or 10" reflector. He notes that it is most probably a bright condensation of the Milky Way on the northwest edge of the Scutum Cloud.
The Messier objects
The Bennett objects
The Caldwell list
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