The Melotte Catalog is a listing of some 248 objects, mostly various open and globular clusters. You may have seen a few numbers on some large non-Messier open clusters (eg: alpha Persei, Hyades, Coma Bernecies). It’s in Simbad to a degree, but there’s no convenient CSV. (ADS has scans of the origional paper, but at best as images or as a PDF)

As such, here it is in a tab-separated format: Melotte catalog.tsv

Note that my transcription isn’t quite one-for-one. I’ve gone with slightly more modern orthography and corrected a typo (M 41 is listed as M 14). Though it’s possible that I’ve introduced other errors. I have not added J2000 coordinates or cross-referenced with other object names.

As an aside, it might be useful to give a distribution of where the objects are (…in epoch 1900):

RA and Dec graph Galactic lat and lon graph

It’s notable that this is functionally an all-sky catalog, though the vast majority of the objects are in or near the galactic plane. There’s also no gap, so you can’t do a Messier Marathon type observation run.