NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC1781
Basic Information
Location and Magnitude
Right Ascension: 5:7:55.1
Declination: -18:11:24
Constellation: LEP
Visual Magnitude: 12.6
Historic Information
Discoverer: Herschel W.
Year of discovery: 1785
Discovery aperture: 18.7
Observational
Summary description: eF, vS, stellar
Sub-type: SB0
Corwin's Notes
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NGC 1781 = NGC 1794. Dreyer reprints as an NGC note JH's note from the GC
explaining the choice of RA's from three different stars in WH's sweep from
6 Feb 1785 -- JH unfortunately picked the wrong RA.
Ormond Stone found the object independently at Leander McCormick about a
century after WH picked it up. But he, too, has the RA wrong. Fortunately,
Stone has left us a sketch of the galaxy and nearby field stars which
positively identify the correct object.
Even without the sketch, Herbert Howe corrected the RA and suggested that the
two NGC numbers refer to the same object, assuming the 3 minute of time RA
difference noted by JH. Howe's observations led to Dreyer's IC2 notes nearly
a decade later, and also to Dreyer's notes in his 1912 edition of WH's
complete papers, and finally, to Dreyer's 1912 MN list of NGC corrections.
Steve's Notes
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NGC 1781
See observing notes for NGC 1794.