NGC/IC Project Restoration Effort
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NGC421
Basic Information
Location and Magnitude
Right Ascension: 1:12:9.6
Declination: +32:7:23
Constellation: PSC
Visual Magnitude: 12.1
Historic Information
Discoverer: Herschel W.
Year of discovery: 1784
Discovery aperture: 18.7
Observational
Summary description: F, pS, R, bM
Sub-type: S0
Corwin's Notes
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NGC 421 may be one of the several faint stars or wide double stars west of NGC
420. WH found the objects on 12 Sept 1784, describing them as "Two. Both
eF, vS. The following is the largest." The field was examined again by JH,
LdR, d'Arrest, and Bigourdan, none of whom found NGC 421, but all of whom
placed NGC 420 within 5 seconds of time of WH's position for the pair.
Dreyer has a curious statement in his note in the Scientific Papers (1912).
Citing the observers above as having "... seen only one nebula," he goes on
with "no doubt the following one." Yet all the observers have assigned the
preceding number (H III 154 = N420) to the object. Dreyer himself followed
JH's lead in this, giving the earlier number to the object that JH, d'A, and
LdR all saw.
In any case, there is no nebula in the area that might be N421. Since
assigning the number to one of the stellar objects mentioned above is pure
speculation, I'm not going to do it. Thus, N421 is "Not found."