Observer's guide
About NGC 7099
NGC 7099 (M30) is catalogued as a globular cluster in Capricornus. Its J2000 position is RA 21:40:22.02, Dec -23:10:44.7, corresponding to 325.0922 degrees RA and -23.1799 degrees Dec. The local catalogue places it about 24,800 light-years away. Its referenced angular extent is approximately 11 by 11 arcminutes.
Observing tips
This is rated as an easy target at magnitude 7.2. It is associated with autumn observing, with midnight placement typically strongest around August. From 52 degrees north its theoretical meridian altitude is about 14.8 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 -185.3 km/s. The SIMBAD record currently connects it to 1135 bibliographic references.
At roughly 11 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 11 by 11 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.