NGC/IC Project Restoration Effort

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NGC7504

 

Basic Information


Location and Magnitude


Right Ascension: 23:10:41.1
Declination: +14:23:10
Constellation: PEG
Visual Magnitude: 13.1

Historic Information


Discoverer: Marth
Year of discovery: 1864
Discovery aperture: 48.0

Observational


Summary description: vF, S, stellar
Sub-type: *

Corwin's Notes

===== NGC 7504 may be a star, as first noted by Reinmuth. It was one of eleven nebulae found by Marth one night late in the summer of 1864 (his date reads "1864.67"), and the only one not clearly a galaxy. The other ten have a systematic offset in the sense Marth-modern of -1.0 seconds in RA, and +0.6 arcmin in Dec from the modern positions. Applying these to his position for N7504 moves the position a bit closer to the star that Wolfgang and I chose as Marth's possible object. However, it is still further from its modern position than most of Marth's other objects from that same night. So, I am not at all sure of the identification of N7504 with this star. There are other galaxies in the area that Marth could have seen, but none have positions suggesting digit errors in Marth's position.