Observer's guide
About NGC 6715
NGC 6715 (M54) is catalogued as a globular cluster in Sagittarius. Its J2000 position is RA 18:55:03.27, Dec -30:28:42.6, corresponding to 283.7639 degrees RA and -30.4799 degrees Dec. The local catalogue places it about 82,800 light-years away. Its referenced angular extent is approximately 9.1 by 9.1 arcminutes.
Observing tips
This is rated as a moderate target at magnitude 7.6. It is associated with summer observing, with midnight placement typically strongest around June. From 52 degrees north its theoretical meridian altitude is about 7.5 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 142.3 km/s. The SIMBAD record currently connects it to 1175 bibliographic references.
At roughly 9.1 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 9.1 by 9.1 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.