Observer's guide
About NGC 2506
NGC 2506 (C54) is catalogued as an open cluster in Monoceros. Its J2000 position is RA 08:00:02, Dec -10:46:11, corresponding to 120.01 degrees RA and -10.7731 degrees Dec. The local catalogue places it about 10,000 light-years away. Its referenced angular extent is approximately 10.6 by 10.6 arcminutes.
Observing tips
This is rated as a moderate target at magnitude 7.6. It is associated with winter observing, with midnight placement typically strongest around January. From 52 degrees north its theoretical meridian altitude is about 27.2 degrees; local horizons and the live altitude chart determine the practical window.
A small telescope under reasonably dark skies is a good starting point; use the live altitude chart to choose its highest point.
What to expect
The SIMBAD classification for the matched source is OpC. A published radial velocity value is 84.1 km/s. The SIMBAD record currently connects it to 320 bibliographic references.
At roughly 10.6 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 10.6 by 10.6 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.