Observer's guide
About NGC 6333
NGC 6333 (M9) is catalogued as a globular cluster in Ophiucus. Its J2000 position is RA 17:19:11.78, Dec -18:30:58.5, corresponding to 259.7991 degrees RA and -18.5162 degrees Dec. The local catalogue places it about 26,700 light-years away. Its referenced angular extent is approximately 8.7 by 8.7 arcminutes.
Observing tips
This is rated as a moderate target at magnitude 7.7. It is associated with summer observing, with midnight placement typically strongest around June. From 52 degrees north its theoretical meridian altitude is about 19.5 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 GlC. A published radial velocity value is 310.8 km/s. The SIMBAD record currently connects it to 350 bibliographic references.
At roughly 8.7 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 8.7 by 8.7 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.