NGC/IC Project Restoration Effort

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NGC1983

 

Basic Information


Location and Magnitude


Right Ascension: 5:27:44.3
Declination: -68:59:10
Constellation: DOR
Visual Magnitude: 9.9

Historic Information


Discoverer: Herschel J.
Year of discovery: 1836
Discovery aperture: 18.3

Observational


Summary description: Cl, vL, pRi, iF
Sub-type: OCL+EN

Corwin's Notes

===== NGC 1983. The position I give refers to the knot of stars north of the center of a stellar association in the LMC which JH describes like this: "A pretty rich irregular cluster which fills the field; a knot in it taken." It's likely that many of the previous studies have simply taken the "knot" as JH's cluster. That, of course, is not strictly correct. His object is the larger scattering of stars, approximately 15' x 11.5', centered about 3 arcmin south of the knot. I give positions for both in the main table. By the way, if we take JH's description as it stands, then his "cluster" includes at least another two of his objects, NGC 1984 and NGC 1994, as knots on the southern side of the association.

Steve's Notes

===== NGC 1983 25" (10/10/15 - OzSky): at 318x; this large star cloud/association (LH 61) includes the embedded cluster S-L 492. It appeared as a very bright, small knot of stars, 30" diameter, with a half-dozen resolved. The star cloud is elongated N-S and is rich in bright and faint stars (too many to count). A very striking N-S string (6' length) of 10 bright mag 10.5-12 stars passes just east of the cluster. Just outside the field to the south (9' from S-L 492) is NGC 1984, along with NGCs 1994 and 1967. Two additional clusters were picked up nearby to the east (nearly collinear with S-L 492). H-S 314, 3.7' E of S-L 492, appeared as a bright, high surface brightness, compact glow, 20" diameter, no resolution. H-S 319, just 2' E of H-S 314, was noted as fairly faint, small, round, 18" diameter, no resolution. A mag 11.5 is off the southeast side [35" from center] and a mag 12.3 star is 0.7' E.