
NGC 6637 is frequently observed by amateur astronomers and is visible as a compact luminous region. It has moderate brightness.
It is currently below the horizon.
It stays above 30° for roughly 8 hours.
Observing conditions matter, contrast improves away from light pollution.
This object is better suited for experienced observers.
In small telescopes it remains mostly unresolved.
It is less prominent than the brightest objects in the catalog.