NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC6416
Basic Information
Location and Magnitude
Right Ascension: 17:44:19.9
Declination: -32:21:40
Constellation: SCO
Visual Magnitude: 5.7
Historic Information
Discoverer: Herschel J.
Year of discovery: 1834
Discovery aperture: 18.3
Observational
Summary description: Cl, vL, Ri, lC
Sub-type: IV1p
Corwin's Notes
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NGC 6416. This cluster is scattered and rather ill-defined. The brighter
stars to the northeast were taken by Andris Lauberts to place the center of
the cluster, and indeed JH's mean position seems to agree with that. However,
JH's descriptions on two nights make the cluster at least as large as his
15-arcminute field, and -- on the second night -- considerably larger ("More
than fills field"). This suggests that JH also included the stars to the
southwest in his object. The position I've adopted for the cluster reflects
that supposition. Whether it's right or not can be answered by a detailed
photometric, spectroscopic, and astrometric study.
Also see NGC 6421 where this may play a role in the identification of that
star cloud.
Steve's Notes
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NGC 6416
17.5" (8/2/97): best view at 100x as it fills the 220x (9mm Nagler) field. The most detached portion consists of a large cloud of at least 15' diameter and containing roughly 75 stars. There are four brighter stars (including mag 8.6 SAO 209208) but most of the stars are pretty uniform in brightness and fairly evenly distributed at 100x. The cluster may extend further north than the region described above but the star density quickly decreases to the general Milky Way appearance.
8" (6/19/82): almost two dozen faint stars, large, scattered, not impressive as fairly coarse.