Observation by John Hughes: Messier 97

Enable overlay
Show stars
Label stars
Show deep sky objects
Label deep sky objects
Show constellation boundaries
Show constellation sticks
Show constellation labels
Show RA/Dec grid

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

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.

Registered charity no. 210769
Registered company no. 117572
For more information including contact details, click here.

Our privacy policy is here.