NGC/IC Project Restoration Effort

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NGC1742

 

Basic Information


Location and Magnitude


Right Ascension: 5:2:0.5
Declination: -3:17:14
Constellation: ORI
Visual Magnitude: 13.7

Historic Information


Discoverer: Ball
Year of discovery: 1866
Discovery aperture: 72.0

Observational


Summary description: vF, vS, 3s.6 f h 342
Sub-type: *

Corwin's Notes

===== NGC 1742. Ball's observation on 29 December 1866 of this puts it 60 arcsec away, in PA 65 deg, from NGC 1740. That clearly identifies the star he took to be a "vF, vS" nebula; he called it "beta". His sketch of the field is clear, too, once the orientation is known. All this is in Dreyer's monograph of LdR's observations. For the NGC, Dreyer used JH's position of NGC 1740 as a reference. Since that is about 15 seconds of time too small, his calculated position for NGC 1742 is also 15 seconds too small. Had I looked at the observation decades ago when I first went over the field, I probably would have gotten it right. As is, I've had the wrong star in the list for all these years (sigh). Well, it's finally right.