Observer's guide
About NGC 6273
NGC 6273 (M19) is catalogued as a globular cluster in Ophiucus. Its J2000 position is RA 17:02:37.68, Dec -26:16:04.6, corresponding to 255.657 degrees RA and -26.2679 degrees Dec. The local catalogue places it about 27,100 light-years away. Its referenced angular extent is approximately 9.6 by 9.6 arcminutes.
Observing tips
This is rated as a moderate target at magnitude 6.8. It is associated with summer observing, with midnight placement typically strongest around June. From 52 degrees north its theoretical meridian altitude is about 11.7 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 GlC. A published radial velocity value is 145.3 km/s. The SIMBAD record currently connects it to 411 bibliographic references.
At roughly 9.6 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 9.6 by 9.6 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.