Abell 85 - a faint supernova remnant in Cassiopeia (Steve Milne)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: The star 9Cas

Abell 85 - a faint supernova remnant in Cassiopeia, Steve Milne

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Abell 85 - a faint supernova remnant in Cassiopeia

Link: https://stevemilne.smugmug.com/Photos/Sky/Nebulae/i-8bT8mKN

Powered byPixInsight

Abell 85 - a faint supernova remnant in Cassiopeia

Link: https://stevemilne.smugmug.com/Photos/Sky/Nebulae/i-8bT8mKN

George Ogden Abell (1927 – 1983) was a research astronomer at UCLA. He produced two astronomical catalogues, derived from the photographic plates of the National Geographic Society - Palomar Observatory Sky Survey (NGS-POSS). These are the Abell catalog of rich clusters of galaxies (1958), and a list of 86 planetary nebulae (1966).

This image is catalogued as Abell ‘planetary’ 85. However, we now know that it is not a planetary nebula. Rather it is a faint supernova remnant located 7,500 – 11,000 light years from Earth in the constellation of Cassiopeia. Abell 85 spans some 100 light years and occupies an area of the sky similar to that of the full moon.

Abell 85 has also been catalogued as radio source CTB 1 ('CalTech obs list B'; Wilson & Bolton, 1960) and LBN 576 (Catalogue of Bright Nebulae, published by Beverly Lynds in 1965).

Abell 85 is an extremely faint object and, despite gathering a large amount of data, the processing was a significant challenge.

Data for this object were captured between 31 August and 11 September 2018, from a remote imaging rig (located in Spain) that is jointly owned and operated by Barry Wilson and me.

Capture details are as follows:

Telescope: Takahashi FSQ 106

Camera: QSI 683 WSG

Filters: Astrodon

Mount: 10 Micron GM1000HPS

Ha: 33 x 1200s

OIII: 43 x 1200s

Red: 24 x 600s

Green: 24 x 600s

Blue: 24 x 600s

A total of 37.3 hours exposure.

Data Capture: Steve Milne & Barry Wilson

Image Processing: Steve Milne

Original
Final
B

B

Description: I've gone back to this, using some newly learned tricks, in an effort to bring out the faint stuff a bit more.

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The refractors!

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Status	Basic success
Started	...
Astrometry.net job	2758311
PixInsight job	n/a
PixInsight queue size	n/a
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Abell 85 - a faint supernova remnant in Cassiopeia

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Abell 85 - a faint supernova remnant in Cassiopeia

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