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RA: 20h 54m 6s
Dec: +45° 14′ 24″
Ch: MSA:1106, U2:85, SA:9
Ref: NGC/IC, Corwin (2004)
Type: star cloud
Mag: B=?, V=?
NGC 6989 is listed as non-existent in RNGC. However, it seems to be a grouping in the northern reaches of the North America Nebula looking pretty much as WH saw it, "A large cluster of pretty small stars of several sizes." I put the position within a minute or two of WH's position, and make the diameter 8' by 8'. This may not, however, be a real cluster, but simply a random group of stars in the rich Milky Way field.
And it may not be the object that WH saw. JH looked for his father's cluster, VIII 82, twice, once saying only "Viewed. A mere clustering portion of the Milky Way," without determining a position for it. The second night, he makes it a "Coarse, poor, pretty large cluster; stars small." He determined a position for it then, but it is 2 minutes, 15 seconds of time east, and 12.5 arcmin north of his father's position. So, when it came time to prepare the GC, he made two separate clusters out of the observations he had at hand.
Since there are "clustering portions of the Milky Way" at both positions, I've kept JH's separate entries as they appear in GC and NGC. The other entry is NGC 6996, which see.
NGC 6997 is a third cluster, probably a real one, in the North America Nebula. See its discussion for even more information.
Synonyms: H VIII-082
Discovered in 1790 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a large cluster of pS stars of several sizes."
The SAC database comments: "HURST: 10in, large and faint, 10' dia, 17 stars"
The RNGC (Sulentic and Tifft 1973) notes that this is a nonexistent object. Their coded description reads NOCL S.
The Messier objects
The Bennett objects
The Caldwell list
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