Andrew Cooper
Jul 6, 2021    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 7 Transparency: 6 Moon: 0%

Large, bright, coarse, 20' diameter, centered on the 6th magnitude star V1036 Sco surrounding which is a tighter 5' clump of 10-11th magnitude stars defining the core of the larger cluster

Andrew Cooper
Aug 15, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 5 Transparency: 6 Moon: 0%

A single bright star, the 5.7 magnitude V1036 Sco defines the center, about the star is a rich clump of star 3' in diameter, while NGC 6383 is listed as being 20' in diameter this is not apparent in the eyepiece the extents of the cluster are lost in the very rich galactic starfield

Harold Corwin

NGC 6374 = NGC 6383. John Herschel has only one observation (in Sweep 794) of NGC 6374, and that is a duplicate of an "Omitted Observation ..." (also in Sweep 794) for NGC 6383 listed at the end of his CGH Observations. (See also NGC 6222 = NGC 6259 where the same thing happened.) He has two other observations of NGC 6383, both on different nights, but with accordant descriptions. In the sweep, where this is Number 24, John Herschel has written over the original RA with the corrected RA shown in the list of Omitted Observations. As with NGC 6222, he added the observation to the Omitted Observations list, but not call out the incorrect observation for omission. So, it showed up in the GC and the NGC.

In the single observation leading to the NGC number 6374, John Herschel identifies the bright star in the middle of the cluster as "B[risbane] 6125". I suspect this is the correct identification, but will have to check. If the number is correct, then it is SAO 208977 = HD 159176.

In any event, there is no doubt that, due to John Herschel's bookkeeping error, the two NGC numbers refer to the same cluster.

― NGC Notes by Harold Corwin

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

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