Observer's guide
About Caroline's Cluster
Caroline's Cluster (C58) is catalogued as an open cluster in Canis Major. Its J2000 position is RA 07:17:48, Dec -15:38:00, corresponding to 109.4429 degrees RA and -15.6311 degrees Dec. The local catalogue places it about 3,700 light-years away. Its referenced angular extent is approximately 18.5 by 18.5 arcminutes.
Observing tips
This is rated as a moderate target at magnitude 7.2. It is associated with winter observing, with midnight placement typically strongest around January. From 52 degrees north its theoretical meridian altitude is about 22.4 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 27.9 km/s. The SIMBAD record currently connects it to 217 bibliographic references.
At roughly 18.5 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 18.5 by 18.5 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.