M45 at Nova East

Here is the fifth and final image taken at the Nova East star party in 2019. It was the last image taken before my camera battery died. The skies were very transparent that evening with several targets including M33 visible to the naked eye, but dew started to roll in causing some slight halos around the brighter stars.

This is a redo of the processing on some data taken at the Nova East Star Party. It is a bit of a pet peeve of mine that many versions of this cluster are stretched to the point where all colour is lost and you end up with a uniform blue-green cluster and nebula. Like any open star cluster, the Pleiades contains stars of various temperatures and sizes so there are many red stars scattered throughout the object. With only 50 minutes of exposure there was no way I could stretch the data enough to bring out the very faint nebulosity throughout the field, so instead I concentrated on getting as much detail and colour as possible from the image. The slightly reddish dust to the bottom right of Merope is clearly visible in this image as is the Ghost of Merope Nebula just below the star. Here is a version of the data, processed to bring out the Ghost and suppress most of the blue nebula. Unfortunately my venerable Canon 60Da was beginning to develop a banding issue and a few are slightly visible in the data.

The second image is an earlier attempt at processing the data.

Click on the first image to see a higher resolution version of the reprocessed data. Click again to return to this version.
Object M45  Object RA 03:47:00 Dec 24:06:55
Date Reprocess 2 December 2020     Original 1 September 2019
Exposure 50 minutes (10 X 5 minutes) 
ISO 800
Camera Canon 60Da DSLR
Optics Prime focus of an Esprit 120 f/7 APO refractor with a focal length of 840 mm
Location Nova East Star Party at Smiley's Park, Nova Scotia
Processing This image was processed entirely in Images Plus. Calibration, stacking, statistical filter applied to reduce noise before stretching. Masked stretching and split star processing used to enhance the image. Masked noise reduction using a frequency domain lowpass filter applied to the DSO layer and then it was recombined with the star layer. Image binned 2 by 2. Final sharpening applied. Since the 60Da has on sensor dark suppression no darks were used in the calibration.