Observation by Kevin G.: M13

Uploaded by

Kevin Gurney

Observer

Kevin G.

Observed

2016 Aug 30 - 19:08

Uploaded

2016 Dec 20 - 19:17

Objects

The Great Globular Cluster in Hercules (M13)

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Constellation

Hercules

Field centre

RA: 16h41m
Dec: +36°28'
Position angle: -7°12'

Field size

0°24' × 0°19'

Equipment
  • Celestron 8SE
  • Atik 460EX mono
  • Skywatcher AZ-EQ6-GT
  • OAG with AVS MkIV video cam
  • ASA 0.77 reducer corrector
Exposure

Lum (IDAS LPS-D1) 5 x 300s; Blue 4 x 300s; Red 5 x 300s: all bin 1x1 at -12C

Location

Sheffield

Target name

M13

Title

M13

About this image

Globular clusters present different challenges than nebulae. The core mustn't be too burnt out, while there should be a halo of fainter stars. I have compromised here... In addition, imaging over multiple nights (as here) is difficult; its hard to plate solve and reacquire the precise target coordinates from the previous session (maybe I'm missing a trick?). The star colours are probably not quite right here too... Still working on a good calibration method.

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