NGC/IC Project Restoration Effort

(This is a very very beta version)



Basic Information

Location and Magnitude

Right Ascension: 4:49:24.3
Declination: +13:8:27
Constellation: ORI
Visual Magnitude: 14.5

Historic Information

Discoverer: Herschel W.
Year of discovery: 1784
Discovery aperture: 18.7


Summary description: Cl, lRi, st L ___DREYER___ S
Sub-type: IV2p

Corwin's Notes

===== NGC 1663 is probably the poor, scattered cluster about 45 seconds of time following WH's single position. This is one of his earlier objects (10 Feb 1784), so the position problem -- if it is one -- may be understandable as part of his learning curve. His description "A cluster of large and small scattered stars, not rich" certainly fits. There are about two dozen stars scattered over an area 12 arcmin by 10 arcmin with a 4 arcmin by 4 arcmin core containing half the stars. WH's position itself sits in a void surrounded by a weak annulus half a degree across of scattered stars, strongest on the following side (where the cluster noted in the previous paragraph sits). Is this the object that WH actually saw? If so, I suspect that he would have noted the annular structure. My best guess is the cluster following his position. Visual verification would not go amiss.

Steve's Notes

===== NGC 1663 17.5" (2/3/03): at 140x, ~20 stars are resolved in a scattered 6'-7' group. Includes a shallow arc of three brighter mag 10 stars on the SW side which may not be cluster members. Most of the mag 12-13 stars are concentrated in a 3' subgroup on the north side. Stands out reasonably well in the field although this group has been listed as a "possible open cluster remnant" - Bica et al., 2001A&A...366..827B. The Lynga position, DSFG, NGC 2000, SC 2000 and RNGC all place the cluster too far west by ~45 tsec of RA.