Observer's guide
About NGC 2437
NGC 2437 (M46) is catalogued as an open cluster in Puppis. Its J2000 position is RA 07:41:46.82, Dec -14:48:36.0, corresponding to 115.445 degrees RA and -14.8439 degrees Dec. The local catalogue places it about 5,400 light-years away. Its referenced angular extent is approximately 25.3 by 25.3 arcminutes.
Observing tips
StarWatchr rates this as an easy target at magnitude 6. It is associated with winter observing, with midnight placement typically strongest around January. From 52 degrees north its theoretical meridian altitude is about 23.2 degrees; local horizons and the live altitude chart determine the practical window.
Its brightness makes it a practical binocular or small-telescope candidate when it is well above the horizon.
What to expect
The SIMBAD classification for the matched source is OpC. A published radial velocity value is 54.5 km/s. The SIMBAD record currently connects it to 180 bibliographic references.
Its roughly 25.3 arcminute span suits a medium field of view. Use the listed 25.3 by 25.3 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.