NGC/IC Project Restoration Effort

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NGC1243

 

Basic Information


Location and Magnitude


Right Ascension: 3:11:25.4
Declination: -8:56:43
Constellation: ERI
Visual Magnitude:

Historic Information


Discoverer: Herschel J.
Year of discovery: 1831
Discovery aperture: 18.3

Observational


Summary description: F, vS, R
Sub-type: *2

Corwin's Notes

===== NGC 1243 is a double star first seen by JH. There are two nebulae here, N1241 and N1242, both discovered by WH (though nearly two years apart). JH saw the brighter (N1241), but thought his father's description of the fainter's position ("... about 1 arcmin north-following II 286 [N1241]") wrong -- it isn't, but JH never saw the fainter (N1242). Curiously, neither did d'A who picked up the same two objects as JH, N1241 and the double star. The first observation at Birr turned up both of WH's nebulae, but not JH's double star, so the sketch made that night shows only the two nebulae and some field stars. JH thought that the orientation of the sketch must be wrong since it did not agree with his own observation. He made a comment to that effect in the note in GC, which certainly confused the situation. It was not until Dreyer looked at the field in November 1877 with the 72-inch that all three objects were observed together for the first time. Dreyer's measurements pinpoint all three, but he still describes N1243 as a nebula, making it the second brightest of the three. His description and sketch from that night is an accurate repesentation of the field -- except that he still believes N1243 to be nebulous.