Observer's guide
About Wishing Well Cluster
Wishing Well Cluster (C91) is catalogued as an open cluster in Carina. Its J2000 position is RA 11:05:39, Dec -58:45:12, corresponding to 166.4171 degrees RA and -58.7069 degrees Dec. The local catalogue places it about 1,621 light-years away. Its referenced angular extent is approximately 64.3 by 64.3 arcminutes.
Observing tips
This is rated as a very easy target at magnitude 3. It is associated with winter observing, with midnight placement typically strongest around March. From 52 degrees north its theoretical meridian altitude is about 0 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 5.7 km/s. The SIMBAD record currently connects it to 433 bibliographic references.
At roughly 64.3 arcminutes across, it favors a wide-field imaging setup. Use the listed 64.3 by 64.3 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.