IC 749 and IC 750 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: HD103954 · IC 749 · IC 750

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IC 749 and IC 750

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IC 749 and IC 750

This close pair of interesting spiral galaxies is located in the constellation of Ursa Major at a declination of +43 degrees. Their distance calculations indicate that they are not interacting and are far apart.

IC 749 is a magnitude 12.5 spiral galaxy located 40 million light years away. It spans 2 arc-minutes in our apparent view, which corresponds to a diameter of 25,000 light years.

I like the color of this galaxy – a yellow barred core with a blue disk, and some hints of pink HII regions. The arms have a crazy structure – the galaxy either has been disturbed or is early in its formation process.

IC 750 is a magnitude 12.2 spiral galaxy located 60 million light years away. Although it has a much bright surface brightness, its magnitude is about the same because the galaxy is spread out over a much smaller area (near edge-on) from our view perspective. It spans 2 arc-minutes in our apparent view, which corresponds to a diameter of 40,000 light years

IC 750 has an unusual strong yellow cast throughout the disk. The disk appears to have strong dust lanes and mottled arms, although its structure is hard to discern because of out near edge-on viewing perspective.

SIMBAD shows that the distance estimates for these 2 galaxies have varied significantly over the years, and that the current estimates are the closest ones in terms of their distance from us. I question the accuracy, because each of these galaxy’s structures suggest that they are larger (and therefore more distant) galaxies than I indicate above.

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Status	Advanced success
Started	...
Astrometry.net job	6616543
PixInsight job	N0SNX7RQ9I0JNHBWDBTKYYUXF4Z36EC0
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h58m44s.139
RA (top/left)	11h59m37s.208
RA (top/right)	11h57m49s.738
RA (bottom/right)	11h57m51s.710
RA (bottom/left)	11h59m38s.207

Dec (center)	+42°43′48″.35
Dec (top/left)	+42°50′38″.23
Dec (top/right)	+42°50′18″.89
Dec (bottom/right)	+42°36′56″.36
Dec (bottom/left)	+42°37′16″.10

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IC 749 and IC 750

IC 749 and IC 750

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IC 749 and IC 750

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