Messier 4

47. Messier 4


Messier 4  RA: 16h 23.6'  Dec: -26 32'   Scorpius (Sco)

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Messier 4 or M4 (also designated NGC 6121) is a globular cluster in the constellation of Scorpius. It was discovered by Philippe Loys de Chéseaux in 1745 and catalogued by Charles Messier in 1764. It was the first globular cluster in which individual stars were resolved.
 

Image Information

Location Fingal ON
Date June 9 2007
Optics Celestron C8
Filters .63 reducer/flattener
Mount Modified HEQ5
Camera Canon Rebel XT
ISO 800
Subexposures 10
Exposure Length 120
Guider Stellarvue Nighthawk II
 

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All images copyright © 2006-2020, Rick Saunders
Main text descriptions sourced from Wikipaedia.
Sky position information is based on IP geolocation and is therefore approximate.