← Back to the gallery
FROM THE OBSERVATORY · 13-Aug-2019

Messier 55 Globular Cluster

Open original image ↗
Messier 55 Globular Cluster
One of the few Messier objects difficult to observe in the northern hemisphere, M55 is a globular cluster 17,600 light years away, comprising of around 100,000 very old stars.
BEHIND THE IMAGE

Notes from the session

This is also the first light photo from the acquisition of a Skywatcher Esprit 120ED. As I'm still waiting for some adapters to be machined to match the included field flattener, I had to settle for a Baader MPCC II (coma corrector). I'm still pleasantly surprised with the result.

Image:
19x 180s Red
19x 180s Green
18x 180s Blue


Total integration 2 hours, 48 minutes.

Hardware:
Skywatcher Esprit 120ED
Skywatcher EQ8 Pro mount
QSI 683-ws8 Camera @ -15°C
Astronomik deep sky RGB filters
Starlight Xpress Lodestar X2 Autoguider
Celestron large format off-axis guider
Baader MPCC II coma corrector
Starlight Instruments Feather Touch Focuser + Posi Drive Motor



Location:
Imaged on 18th June 2019.
Orange zone in Brisbane, Australia. (Bortle 7)



Software:
Planning & camera alignment with Aladin 10
Captured with TheSkyX Professional
Guiding with PHD2
FocusMax auto focus
PixInsight: Calibrate, align, integrate, dynamic background extraction, RGB combination, noise reduction, photometric color calibration, deconvolution, histogram, curves, crop.