Observation by Martin Butcher: NGC869, NGC884 & COMET HARTLEY 2

Uploaded by

Stuart Morris

Observer

Martin Butcher

Observed

2010 Oct 07 - 22:40

Uploaded

2021 Mar 31 - 19:44

Objects

NGC869
NGC884
103P Hartley

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Constellation

Perseus

Field centre

RA: 02^h15^m
Dec: +56°56'
Position angle: -7°41'

Field size

3°11' × 2°07'

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

Eleven sub-exposures each of 60 seconds taken at ISO1600

Location

Isle of Colonsay

Target name

COMET HARTLEY 2

Title

NGC869, NGC884 & COMET HARTLEY 2

About this image

Comet Hartley 2 is a small Jupiter-family comet having an orbital period of 6.46 years.

NGC869 and NGC 884 are two bright open clusters in the constellation of Perseus, Together they are commonly known as the "Double Cluster".

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 polar aligned. Telescope driven but unguided. Telescope and camera on Mains Power.

Exposure details:- Eleven sub-exposures each of 60 seconds taken at ISO1600. Ambient temperature 8 degrees Celsius.

Processing details:- After quality control 10 sub-exposures calibrated with Dark, Flat-field and Bias master frames and combined in Images Plus. This image was then further processed in Photoshop CS3 and Noise Ninja. North is at the top.

Narrative description:- New Moon at October 7 1844 UT. The weather was cool, clear and with a stiff breeze (Force 5) from the south east. The telescope was set up to the west of my house, but even so some turbulence was experienced on the leeward side of the building.

Files associated with this observation

MButcherNGC869 & NGC884 & Comet Hartley 2.jpg (513.3 kB)

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