Globular cluster · 8 August 2026

M13 Great Hercules Cluster

M13 stood out clearly despite the still relatively bright sky and resolved into individual stars all the way to the core.

Observation notes

Although the sky was still relatively bright, M13 stood out surprisingly clearly. The cluster resolved into individual stars all the way to the core.

Visual documentation

Photographic documentation of M13 at the time of observation
Photographic documentation. The image was captured through the telescope with a Nikon D6 at the time of observation and subsequently processed to approximate the object's visual appearance at the eyepiece. For this type of documentation, a single exposure of approximately 10–15 seconds is normally used.

Object location in the sky

Star chart centred on M13 in the constellation Hercules
Visible above the southern horizon around midnight in June.M13 is marked in Hercules. The chart shows the object's astronomical position and nearby constellation lines in the J2000 coordinate system.

Sources for object data

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

Published 9 August 2026 · Last revised 29 August 2026 ·
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