Observation by Martin Butcher: Melotte 111 - The Coma Star Cluster.

Uploaded by

Stuart Morris

Observer

Martin Butcher

Observed

2010 Mar 10 - 02:45

Uploaded

2021 Mar 27 - 15:36

Objects

The Coma Star Cluster (Melotte 111)

Planetarium overlay

Enable overlay
Show stars
Label stars
Show deep sky objects
Label deep sky objects
Show constellation boundaries
Show constellation sticks
Show constellation labels
Show RA/Dec grid

Constellation

Coma Berenices

Field centre

RA: 12^h25^m
Dec: +26°34'
Position angle: -1°03'

Field size

9° × 5°

Equipment

Meade LX-90 8" telescope fitted to its field tripod by an equatorial wedge.
LX-90 Periodic Error Correction enabled.
Dew Removal straps fitted to telescope and camera lens
Telescope and camera powered by Mains Power.
Stock Canon 40D with 200mm f/2.8 lens stopped down to f/4
Telescope driven but unguided

Exposure

Four sub-exposures each 10 minutes long taken at ISO800

Location

Isle of Colonsay

Target name

Melotte 111

Title

Melotte 111 - The Coma Star Cluster.

About this image

Melotte 111, is a loose naked eye open cluster, which is also called the Coma Star Cluster and can be found in the constellation of Coma Berenices.

Equipment used:- Stock Canon 40D with 50mm f/1.8 lens stopped down to f/4 mounted piggy-back on Meade LX-90 8" telescope fitted to its field tripod by an equatorial wedge. Telescope polar aligned. LX-90 Periodic Error Correction enabled. Dew Removal straps fitted to telescope and camera lens and operating. Telescope driven and manually guided. Telescope and camera powered by Mains Power.

Exposure details:- Four sub-exposures each 10 minutes long taken at ISO800. Ambient temperature minus 8 degrees Celsius.

Processing details:- After quality control 3 sub-exposures calibrated with Dark, Flat-field and Bias master frames before being combined in Images Plus. Image then further processed in Photoshop CS3 and Noise Ninja. North is at the top.

Narrative description:- Twenty four days after New Moon, the Moon did not rise above hills to the south east until after imaging was completed. The weather was cold, clear and calm with dew.

Files associated with this observation

MButcherMelotte 111.jpg (217.3 kB)

Like this image

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.

Registered charity no. 210769
Registered company no. 117572

For more information including contact details, click here.

Our Terms of Use are here.

Our Privacy Policy is here.