NGC 4449 - A Nearby Irregular Dwarf Galaxy (John Hayes)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: NGC 4449

Image of the day 05/08/2016

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NGC 4449 - A Nearby Irregular Dwarf Galaxy

Image of the day 05/08/2016

Powered byPixInsight

NGC 4449 - A Nearby Irregular Dwarf Galaxy

NGC 4449 is a irregular dwarf galaxy only about 12 Mly away. It is considered a star burst galaxy because of the high number of star formation regions. Look carefully and you can see dark nebula and a lot of Ha regions. This is a cropped image from the full 0.5 x 0.5 degree field that I get with the 16803 sensor.

This image is the first taken with my functioning fully automated C14 Edge system. I still have to roll it out and do a polar alignment, but once I have the guide star acquired, it can run unattended all night. I just have to make sure to keep it far enough off the edge of the taxiway so that a late night passing airplane can't hit it...and I can go to sleep. Hallelujah! Focusing was done automatically between exposures with the IFI/Optec FocusLock system, which has worked flawlessly. It looks like I still have some filter offsets to work out but it's pretty close to being fully functional. This data was taken over a two night period. The first night I wasted a lot of the clear sky time getting things set up and running. The second night, I just got it going and went to sleep. Unfortunately the wind started out at around 8 kts (way too much!) and only gradually decreased to around 4 kts through the second night. That meant that I had to toss out a lot of data due to the gusty conditions. (It was cold enough that I had to use a dew-shield, which make matters even worse.) Most of this data was between 1.8 and 2.5 arc-sec FWHM.

I've uploaded a couple of cropped views. Without spiral arms this galaxy is not super spectacular so it's best to zoom in a bit to appreciate all of the features. I made the final view a pretty tight crop to present it a bit better. As always, C&C is more than welcome...

John

Original
B
C
Final
D

Cloudy Nights

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Status	Advanced success
Started	...
Astrometry.net job	1063090
PixInsight job	4JX7NFAPTSRBKBWTZUIVX0MD5B4K9L6H
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h28m10s.397
RA (top/left)	12h28m55s.170
RA (top/right)	12h27m22s.295
RA (bottom/right)	12h27m25s.402
RA (bottom/left)	12h28m58s.608

Dec (center)	+44°05′36″.40
Dec (top/left)	+43°56′55″.49
Dec (top/right)	+43°57′31″.71
Dec (bottom/right)	+44°14′14″.72
Dec (bottom/left)	+44°13′38″.20

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Image of the day 05/08/2016

NGC 4449 - A Nearby Irregular Dwarf Galaxy

Image of the day 05/08/2016

NGC 4449 - A Nearby Irregular Dwarf Galaxy

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Image of the day 05/08/2016

NGC 4449 - A Nearby Irregular Dwarf Galaxy

Image of the day 05/08/2016

NGC 4449 - A Nearby Irregular Dwarf Galaxy

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