Observer's guide
About Owl Cluster
Owl Cluster (C13) is catalogued as an open cluster in Cassiopeia. Its J2000 position is RA 01:19:33, Dec +58:20:43, corresponding to 19.8871 degrees RA and 58.2781 degrees Dec. Its distance is not listed consistently in the local catalogue. Its referenced angular extent is approximately 15 by 15 arcminutes.
Observing tips
StarWatchr rates this as an easy target at magnitude 6.4. It is associated with autumn observing, with midnight placement typically strongest around October. From 52 degrees north its theoretical meridian altitude is about 83.7 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 -11.6 km/s. The SIMBAD record currently connects it to 260 bibliographic references.
At roughly 15 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 15 by 15 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.