Observation by Martin Butcher: NGC 2237 and NGC2244 - The Rosetta Nebul...

Uploaded by

Stuart Morris

Observer

Martin Butcher

Observed

2012 Jan 27 - 21:42

Uploaded

2021 Apr 05 - 19:51

Objects

NGC2237
NGC2244
NGC2239
NGC2238
NGC2246

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Constellation

Monoceros

Field centre

RA: 06^h31^m
Dec: +04°59'
Position angle: -2°03'

Field size

2°51' × 1°54'

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

One hundred sub-exposures of 60 seconds at ISO1600.

Location

Isle of Colonsay

Target name

NGC 2237 and NGC2244

Title

NGC 2237 and NGC2244 - The Rosetta Nebula

About this image

NGC 2237 is a vast cloud of dust and gas, extending over an area of more than 1 degree across, or about 5 times the area covered by the full moon.

NGC2238, NGC2239 and NGC46 are also part of the nebulous region.

Within the nebula, open star cluster NGC 2244 is situated, consisted of the young stars which recently formed from the nebula's material, and the brightest of which make the nebula shine by exciting its atoms to emit radiation.

Equipment used:- Stock Canon 40D with 200mm f/2.8 lens mounted piggy-back on Meade LX-90 8" telescope fitted to its field tripod by an equatorial wedge. Telescope only roughly polar aligned. LX-90 Periodic Error Correction enabled. Telescope driven but unguided. Telescope and camera powered by internal batteries.

Exposure details:- One hundred sub-exposures of 60 seconds at ISO1600. Ambient temperature minus 5 degrees Celsius.

Processing details:- After quality control 84 sub-exposures were calibrated with Dark, Flat-field and Bias master frames before being combined and processed in Images Plus. Noise reduction performed in Noise Ninja. North is at the top. Image cropped to give field of view of 3.7 degrees x 2.4 degrees.

Narrative description:- Five days after New Moon. The weather was cold, clear and calm with heavy dew.

Files associated with this observation

MButcherNGC2237 & NGC2244.jpg (432.1 kB)

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