M13 CLUSTER

M13 Cluster by Jaspal Chadha, London, UK. Equipment: Altair Astro RC 250 TT, Ioptron CEM60, QSI 690 CCD

Jaspal Chadha

London

TELESCOPE: ALTAIR ASTRO RC 250 TT
MOUNT: IOPTRON CEM60
CCD: QSI 690 CCD
LUM 3 X 500 SECONDS
RGB 3 X 500 SECONDS

In 1716, English astronomer Edmond Halley noted, “This is but a little Patch, but it shews itself to the naked Eye, when the Sky is serene and the Moon absent.” Of course, M13 is now modestly recognized as the Great Globular Cluster in Hercules, one of the brightest globular star clusters in the northern sky. Telescopic views reveal the spectacular cluster’s hundreds of thousands of stars. At a distance of 25,000 light-years, the cluster stars crowd into a region 150 light-years in diameter, but approaching the cluster core upwards of 100 stars could be contained in a cube just 3 light-years on a side. For comparison, the closest star to the Sun is over 4 light-years away

2015-04-18T00:00:00

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