Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  12.97  ·  23 Thalia  ·  DK Sgr  ·  DL Sgr  ·  DM Sgr  ·  DN Sgr  ·  DO Sgr  ·  DP Sgr  ·  DR Sgr  ·  DS Sgr  ·  M 55  ·  NGC 6809  ·  V4373 Sgr  ·  V5111 Sgr  ·  V6525 Sgr
Getting plate-solving status, please wait...
M55 = Globular Cluster, 



    
        

            Gary JONES
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M55 = Globular Cluster

Getting plate-solving status, please wait...
M55 = Globular Cluster, 



    
        

            Gary JONES
Powered byPixInsight

M55 = Globular Cluster

Acquisition details

Dates:
Oct. 5, 2021
Frames:
Astronomik UHC-E 2": 27×180(1h 21′) (gain: 90.00) -10°C bin 1×1
Integration:
1h 21′
Avg. Moon age:
28.46 days
Avg. Moon phase:
1.30%
Bortle Dark-Sky Scale:
5.00
Temperature:
15.00

RA center: 19h40m01s.99

DEC center: -30°5749.4

Pixel scale: 2.392 arcsec/pixel

Orientation: 83.106 degrees

Field radius: 1.974 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 4944x3284

File size: 11.6 MB

Locations: Home, Sydney, New South Wales, Australia

Data source: Backyard

Description

At a size of only 19', M55 is a difficult target for my small telescope.

But, with near-prefect conditions last night and M55 almost at zenith, I thought this was the best chance I would ever get

I was very pleased with this image, particularly as I (finally) managed to get a near-perfect Polar Alignment, and excellent tracking.

Comments

Sky plot

Sky plot

Histogram

M55 = Globular Cluster, 



    
        

            Gary JONES