M103 / NGC 581

Designation(s)M103, NGC 581
Object Type(s)Open Cluster
Relevant Catalog(s)All (Chron), Messier, NGC
Obs. Lat/Long42° 17', 073° 57'
ConstellationCassiopeia
Date and Time Observed2023-12-06 07:29:00
InstrumentAskar V 80mm extender 600mm
CameraASI294mc-Pro
Image DetailsUp is 273.3 degrees E of N. Total integration time was 5m 30s. Exposures 30s@305g, UV/IR Cut Filter. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding..
DescriptionSmall, attractive cluster in Cassiopeia, part of Dec EAA challenge. M103 was the highest catalog number in the Messier catalog during his lifetime. M104-110 were added by later astronomers based on observing notes and writings that showed Messier or his assistant, Méchain had observed them after the last publication date of their catalog.
Catalog Links
 Messier Listings 
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