M3 Globular Cluster


Mark Griffith

Swindon, Wiltshire. UK

Celestron C11 Sct, Skywatcher EQ8 pro mount,Atik 383L+ camera, motorised filter wheel and Astronomik filters.

Globular cluster in the constellation canes venatici. Dense core of 250,000 stars in 11 light years.

These objects are on the edge of our milky way galaxy.

Trebling my exposure times to 7.5 minutes to capture more of the faint stars. Cropped the image to highlight more of the detail.

Data collected on 4 nights 26th february & 22nd, 24th, 26th March.

LRGB image with 11 hours and 15 minutes of data. 42 Lum 1×1 binning 15 red 17 green 16 blue 2×2 binning all 7.5 min minute exposures.

Started updgrading my imaging setup this month. Bought a skywatcher EQ8 mount to cope with my overweight problems.

Better than as NEQ6 pro mount. Altitude adjustment is smooth and easy to do, power cable is a screw in type so it doesn’t drop out,
handset polar alignment is more accurate than a polar scope, 3 star goto alignment doesn’t pick stars that cause a failed alignment.

Still got mirror flop issues with my c11 sct tube and losing data. Ordered a GSO 12″ Richey-Chretien Optical tube and waiting for delivery.