Globular cluster · 1 August 2026

M13 Great Hercules Cluster

The cluster resolved into individual stars all the way to the core despite the bright moonlight.

Observation notes

Although the Moon was nearly full, the cluster stood out clearly against the bright sky background and resolved into individual stars all the way to the core. I also tried higher magnifications with other eyepieces, with equally good results.

Visual documentation

No visual documentation is linked to this observation.

Object location in the sky

Star chart centred on M13 in the constellation HerculesShow object on the star chart →
Visible above the southern horizon around midnight in June.M13 is marked in Hercules. The chart shows the object's position together with constellation lines for orientation. Star and object positions are given for J2000.0.

Sources for object data

The object data are rounded and based on the following sources:

Published 4 August 2026 · Last revised 30 August 2026 ·
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