Observation by Martin Butcher: M1 - The Crab Nebula

Uploaded by

Stuart Morris

Observer

Martin Butcher

Observed

2010 Nov 15 - 01:24

Uploaded

2021 Apr 03 - 15:54

Objects

The Crab Nebula (M1)

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Constellation

Taurus

Field centre

RA: 05^h34^m
Dec: +22°01'
Position angle: +20°52'

Field size

0°42' × 0°27'

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
Dew Removal straps fitted to telescope and camera lens
Stock Canon 40D with 200mm f/2.8 lens stopped down to f/4
Stock Canon 40D with 200mm f/2.8 lens stopped down to f/4

Exposure

One hundred sub-exposures each 60 seconds long taken at ISO1600

Location

Isle of Colonsay

Target name

M1 - Supernova remnant

Title

M1 - The Crab Nebula

About this image

M1, The Crab Nebula is a supernova remnant and pulsar wind nebula in the constellation of Taurus.

Equipment used:- Stock Canon 40D mounted at Prime Focus on Meade LX-90 8” telescope (focal ratio f/10 focal length 2,000mm) with a 0.63x Focal Reducer (giving an effective focal ratio of f/6.3 and focal length of 1,279mm) fitted to its field tripod by an equatorial wedge. Telescope Polar Aligned. Dew Removal straps fitted to telescope and operating. Telescope driven but unguided. Telescope and camera powered by Mains Power.

Exposure details:- One hundred sub-exposures each 60 seconds long taken at ISO1600. Ambient temperature minus 6 degrees Celsius.

Processing details:- After quality control 66 sub-exposures calibrated with Dark, Flat-field and Bias Master frames before being combined and further processed in Images Plus. Noise reduction conducted in Noise Ninja. North is at the top. Image cropped to give field of view of 33 arc minutes x 22 arc minutes and also 23 arc minutes x 15 arc minutes.

Narrative description:- Nine days after New Moon, the Moon had set before imaging commencing. The weather was cold, clear and calm with light dew that turned to a thin film of ice.

Files associated with this observation

MButcher(2)NGC1952 or M1-33'x22'.jpg (139.9 kB)

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