Observation by Alan Thomas: NGC6229 Globular Cluster in Hercules

Uploaded by

Alan Thomas

Observer

Alan Thomas

Observed

2022 Aug 05 - 21:40

Uploaded

2022 Aug 18 - 11:45

Objects

NGC6229

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Constellation

Hercules

Field centre

RA: 16^h46^m
Dec: +47°35'
Position angle: +57°10'

Field size

0°24' × 0°18'

Equipment

Unistellar eQuinox 112mm reflector

Exposure

20min

Location

Norbreck Observatory, Warrington, Cheshire, UK.

Target name

NGC6229 Globular Cluster in Hercules

Title

NGC6229 Globular Cluster in Hercules

About this image

This Class IV (intermediate rich concentration) globular cluster is the junior member of the trio in Hercules (after M13 and M92). It was discovered by William Herschel in May 1787. At a distance of c.103,000ly it is a remote object, four times as far away as M13 with an apparent diameter about a quarter that of its big brother (4.5'/20'). However, their absolute magnitudes are closely matched (-8.4/-8.5).

This image shows a bright, irregular unresolved core surrounded by nebulosity overlain by a scattering of relatively bright stars.

Apparent mag. 9.4. Age c.12.6-14.2billion yrs. (Another estimate older than the estimated age of the Universe/our Universe! See Callum Potter's piece in the 2022 July Deep Sky Update. Also Boldrin E., Bombieri D. & Ercole L. Photometric analysis of the open cluster NGC 2420 and of the globular cluster NGC 6229, THE SKY AS LABORATORY, 2008/2009, pp.1-4 .)

Bortle 7/8, light high cloud, no Moon.

Files associated with this observation

eVscope-20220805-214029 (2).jpg (1.5 MB)

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Callum Potter

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