Observation by Martin Butcher: M35 - is a large open star cluster

Uploaded by

Stuart Morris

Observer

Martin Butcher

Observed

2012 Jan 27 - 21:23

Uploaded

2021 Apr 05 - 19:33

Objects

M35

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Constellation

Gemini

Field centre

RA: 06^h09^m
Dec: +24°18'
Position angle: -1°59'

Field size

1°42' × 1°08'

Equipment

Meade LX-90 8" telescope fitted to its field tripod by an equatorial wedge.
X-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

Ten sub-exposures of 30 seconds at ISO1600

Target name

Isle of Colonsay

Title

M35 - is a large open star cluster

About this image

M35, a large open star cluster located in the constellation Gemini, and lies near the border with the adjacent constellations of Taurus, Auriga and Orion

Equipment used:- Stock Canon 40D with 200mm f/2.8 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 only roughly polar aligned. LX-90 Periodic Error Correction enabled. Telescope driven but unguided. Telescope and camera powered by internal batteries.

Exposure details:- Ten sub-exposures of 30 seconds at ISO1600. Ambient temperature minus 5 degrees Celsius.

Processing details:- After quality control 8 sub-exposures were calibrated with Dark, Flat-field and Bias master frames before being combined in Images Plus. This image was then further processed in Photoshop CS5 and Noise Ninja. North is at the top. Image cropped to give field of view of 2.5 degrees x 1.6 degrees.

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

Files associated with this observation

MButcherNGC2168 or M35.jpg (62.9 kB)

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