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NGC7331
Image Information
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From SEDS.org "Discovered by William Herschel in 1784.
NGC 7331 is one of the brighter galaxies which is not included in
Messier's catalog. It exposes a fine spiral structure despite its small
inclination from the edge-on position. Several companions and background
galaxies are visible even in our photo.
NGC 7331 was among the earliest recognized spiral galaxies, and
listed by
Lord Rosse in his list of 14 "spiral or curvilinear nebulae"
discovered before 1850.
One supernova has been discovered in NGC 7331 so far: SN 1959D,
discovered by Milton Humason at 32"W and 13"N of the galaxy's nucleus.
This supernova became as bright as 13.4 mag (see IAUC 1682 and PASP
105, 1250)."
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| This image is compiled from 31 - 20 minute
luminance images for a total of 10 hours and 20 minutes. All data measured as being 2.5"
or less by CCD Inspector. All
data was acquired using MaxImDl/CCD version 5 using ACP.
Images were calibrated and
De-Bloomed in MaxIm using Ron Wodaski's De-Bloomer plug-in. All images
aligned, averaged combined, 5 iterations of Regularized Lucy
Richardson de-convolution, and histogram adjusted at 32 bit depth
using Pix Insight version 1.61. The master images were
combined and registered in Pix Insight. Photoshop CS 4 was used to
create the web version JPGs. The luminance image data was
collected over September 4-10, 2010.
Color data taken from September 12 - October
2, and added October 2, 2010 with 14 - 20 minute each for red, blue,
and green frames. Total exposure for the LRGB image is
24-1/3 hours. |
Equipment and Location Information
| Date |
September 12-14, 2010 for
Luminance Color September 12 - October 2, 2010 |
| Location |
Dogwood Ridge Observatory |
| Optics |
OGS 12.5" RC |
| Mount |
Astro Physics AP1200GTO |
| Camera |
SBIG ST10XME/AO8 |
| Filters |
Baader LRGB
1.25" mounted |
| Conditions |
Temperature middle 50s - mid
60s with very
moderate seeing. Transparency good to moderate. |
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