Observation by David Davies: NGC 7479, C44

Uploaded by

David Davies

Observer

David Davies

Observed

2021 Oct 25 - 23:00

Uploaded

2021 Nov 01 - 12:46

Objects

NGC7479

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Constellation

Pegasus

Field centre

RA: 23^h04^m
Dec: +12°19'
Position angle: -0°14'

Field size

0°17' × 0°13'

Equipment

200mm Ritchey-Chretien telescope, Astrodon filters
QSI 683 camera
Skywatcher EQ8 mount

Exposure

RGB, 10x 10-minutes exposures, 40 x 5-minutes luminance

Location

Cambridge, UK

Target name

NGC7479, C44, The Propeller Galaxy

Title

NGC 7479, C44

About this image

I've been trying to image NGC 7479 in Pegasus since 2017, but I've found it to be quite small and faint for my 8-inch telescope, and I could never capture enough data to render it well. I've returned to it once more this year and have had more luck. I've been able to use some colour data from 2018 captured with my previous QSI 583 camera. I confess that I found the quality of the subs to be quite marginal due to the many hot pixels and dead lines on that old sensor. However, and with a bit of work, I've been able to use the data.

NGC 7479 is a classical barred spiral galaxy. The galaxy's orientation is almost face-on to us, making it one of the most attractive barred-spiral galaxies to observe from the northern hemisphere. At 105 million light-years distant and 150,000 light-years across, NGC 7479 shines at magnitude 11 and is just 4 x 3 arc minutes in apparent size. The core is a large bright bar, and the S-shaped spiral arms give rise to its nicknames, The Propeller or the Superman Galaxy. The outer regions of the spiral arms are very faint.

After cleaning of hot pixels, satellite tracks and dead lines, the colour data was calibrated using the Photometric Colour Calibration tool in Pixinsight. I also found the Pixinsight Subframe Selector tool to be very useful in selecting the best luminance subs before processing them.

Files associated with this observation

NGC_7479_LRGB.jpg (1.9 MB)

Like this image

Dominic Ford, Mr John William Hughes, Graham Winstanley, Manolo_Rodriguez, Martina McGovern, Ron Arbour

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