Observation by John Hughes: Messier 97

Uploaded by

Mr John William Hughes

Observer

John Hughes

Observed

2021 Feb 28 - 21:35

Uploaded

2021 Mar 03 - 21:52

Objects

The Owl Nebula (M97)

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Constellation

Ursa Major

Field centre

RA: 11^h14^m
Dec: +55°01'
Position angle: +2°51'

Field size

0°33' × 0°26'

Equipment

StellaLyra RC8
ZWO ASI1600mm Pro Cool
SkyWatcher EQ6R-Pro
Chroma 1.25” 3nm Ha filter

Exposure

300 s exposure, Gain 139, Offset 30

Location

North Essex

Target name

Messier 97

Title

Messier 97

About this image

Last year I purchased a 8 inch Ritchey Chretien scope and have spent several months trying to get it collimated. In the end I reset the primary mirror, collimated as close as I could by eye using a Cheshire then made the remaining adjustments using an out of focus star.

A subsequent test run was undertaken capturing Messier 97 shown here. The image was then uploaded to Astrometry.net to see whether the native focal length was out or not. Thankfully the report back revealed a focal length of 1,604 mm compared to a factory setting of 1,600 mm. I will take that result.

Files associated with this observation

M97.jpg (432.5 kB)

Like this image

David Basey, Callum Potter, Graham Winstanley, Ron Arbour

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