From:[email protected] <[email protected]> on behalf of bw <bw_msg01@...>
Sent:?21 December 2023 22:37
To:[email protected] <[email protected]>
Subject:?[QSI-CCD] NGC 891 image

This is an image of NGC 891, a popular and often photographed edge-on spiral galaxy in Andromeda. It is thought to be quite similar to the Milky Way galaxy in terms of overall luminosity, structure, and size. The galaxy lies about 27M l-y away toward the constellation Andromeda.? Its most unusual characteristic is the filamentary patterns of material that extend into the halo, perpendicular to the plane of the disk.? These are not understood but early theories have proposed that supernova explosions may have played a role in displacing material out of the disk. I chose this target to replace an earlier version that had been taken under mediocre atmospheric conditions and also to compare the use of the BlurX and NoiseX tools which, of course, produced better results.? The image was captured during 3 nights in December 2023 from SkyPi Remote Observatory using a 12.5" PlaneWave scope and a QSI-640ws camera at f/8.? LRGB integration covered 15.7 hours.

https://coldphotons.com/zen_astro/astro_images/NGC891_LRGB_Web.jpg

Thanks for looking and happy holidays,
Bruce W.

From: "bw msg01" <bw_msg01@...>
To: "QSI-CCD" <[email protected]>
Sent: Thursday, December 21, 2023 5:37:45 PM
Subject: [QSI-CCD] NGC 891 image

This is an image of NGC 891, a popular and often photographed edge-on spiral galaxy in Andromeda. It is thought to be quite similar to the Milky Way galaxy in terms of overall luminosity, structure, and size. The galaxy lies about 27M l-y away toward the constellation Andromeda.? Its most unusual characteristic is the filamentary patterns of material that extend into the halo, perpendicular to the plane of the disk.? These are not understood but early theories have proposed that supernova explosions may have played a role in displacing material out of the disk. I chose this target to replace an earlier version that had been taken under mediocre atmospheric conditions and also to compare the use of the BlurX and NoiseX tools which, of course, produced better results.? The image was captured during 3 nights in December 2023 from SkyPi Remote Observatory using a 12.5" PlaneWave scope and a QSI-640ws camera at f/8.? LRGB integration covered 15.7 hours.

https://coldphotons.com/zen_astro/astro_images/NGC891_LRGB_Web.jpg

Thanks for looking and happy holidays,
Bruce W.