OF THE ROGER N. CLARK
OF THE ROGER N. CLARK
OF THE ROGER N. CLARK
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NGC 4449, GALAXY IN CANES VENATICI<br />
R.A. 12h 28.2m, Dec. 44° 05' (2000.0)<br />
Technical. NGC 4449 is an irregular galaxy<br />
in the approximate shape of a rectangle. On<br />
the northern corner is a small hook that<br />
points east, composed mostly ofH II regions.<br />
VISUAL ASTRONOMY <strong>OF</strong> <strong>THE</strong> DEEP SKY<br />
Visual. This galaxy appears 4.2 by 3.0 arc.<br />
minutes in size and has a total magnitude of<br />
10.5. The mean surface brightness is 21.9<br />
magnitudes per square arc-second. Through<br />
the 8-inch, the galaxy appeared as an elon.<br />
gated glow with a faint extension on the north<br />
side that corresponds to the hook in the<br />
photograph. Under some conditions at low<br />
powers with medium size telescopes, the<br />
galaxy may appear more rectangular.<br />
A VISUAL ATLAS <strong>OF</strong> DEEP-SKY OBJECTS<br />
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Photograph of NGC 4449. South is up . (Courtesy of<br />
K.A. Brownlee and Deep Sky Magazine.)<br />
Scale: 1.0 arc-min/cm<br />
8-inch flll.5 Cassegrain<br />
12.4mm Erfle (188X)<br />
Drawing of NGC 4449.<br />
Viewing Distance (Cr.1)<br />
25 X:138 200x:17<br />
50 X: 68 300 X : I I<br />
lOOx: 34 400 x: 9<br />
air mass: l.16, faintest star: 14.3 at zenith 188x·<br />
"<br />
no tracking<br />
5/ 1 1/83 9: 17-9:30 UT at Waianae ranch ' Hawaii· ,<br />
R. Clark<br />
150<br />
151
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