The Caldwell Objects

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NGC 2403
Type: Mixed Spiral Galaxy (SABcd)
Con: Camelopardalis
RA: 07 H 36.9 M
Dec: +65° 36'
Mag: 8.4; 7.3 (O'Meara)
Dim: 23.8' X 12.8'
SB: 14.6
Dist: 14 million light-years
Disc: William Herschel, 1788
W. HERSCHEL: [Observed 1 November 1788] Considerably bright.
Round. Very gradually brighter in the middle. Bright nucleus. 6'
or 7' diameter, with a faint branch extending a great way to the
north pre-
O F THE SKY' S 88 CONSTELLATIONS, C AM-
elopardalis is not only one of the largest but also
one of the faintest. In size the celestial Giraffe is
significant; its jagged boundaries
The Caldwell Objects
ceding [northwestern] side; not less than ½°, and to the north
or north following [northeast] the nebulosity [is] diffused over
a space, I am pretty sure, not less than a whole degree. (H V-44)
GC: Remarkable, considerably bright, extremely large, very
much extended, very gradually much brighter in the middle to
a 7' nucleus.
NGC: Remarkable, considerably bright, extremely large, very
much extended, very gradually much brighter in the middle, to
a nucleus.
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outline 757 square degrees of sky, making it the
18th-largest constellation on the celestial sphere.
But Camelopardalis contains no stars brighter
than 4th magnitude, and even though
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