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Observation by Dean Ashton: Owl Nebula

Uploaded by

Dean Ashton

Observer

Dean Ashton

Observed

2020 Apr 06 - 20:00

Uploaded

2020 Apr 07 - 13:34

Objects

The Owl Nebula (M97)

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Constellation

Ursa Major

Field centre

RA: 11h14m
Dec: +55°01'
Position angle: +90°15'

Field size

0°23' × 0°17'

Equipment
  • 235mm (9.25") Celestron EdgeHD
  • CGEM mount
  • Nightscape 10100 CCD OSC
Exposure

/f10 24x600seconds Optolong L-eNhance Filter

Location

St Austell, Cornwall UK

Target name

M97

Title

Owl Nebula

About this image

M97 was imaged using an Optolong L-eNhance filter during a full moon.  The L-eNhance filter transmits narrow band wavelengths for Ha, Hb and Oiii for use with a colour camera.  The filter was highly effective at blocking the moon glow.  

The Nightscape 10100 CCD was used with 1x1 binning for 10-minute exposures with the scope at it native /f10.  The CCD has small 4.75micron square pixels.  This combination did not give adequate contrast of the stars in the image for routine star-alignment of the calibrated light frames.  I will try with 2x2 binning the next time I use the filter.

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