NGC 2403

NGC 2403
NGC 2403HST.jpg
A Hubble Space Telescope (HST) image of NGC 2403
Credit: HST/NASA/ESA
Observation data (J2000 epoch)
ConstellationCamelopardalis
Right ascension07h 36m 51.4s[1]
Declination+65° 36′ 09″[1]
Redshift131 ± 3 km/s[1]
Distance8 Mly (2.5 Mpc)[2]
Apparent magnitude (V)8.9[1]
Characteristics
TypeSAB(s)cd[1]
Apparent size (V)21′.9 × 12′.3[1]
Other designations
UGC 3918,[1] PGC 21396,[1] Caldwell 7
See also: Galaxy, List of galaxies

Coordinates: Sky mapCoordinates: Sky map07h 36m 51.4s, +65° 36′ 09″

NGC 2403 (also known as Caldwell 7) is an intermediate spiral galaxy in the constellation Camelopardalis. NGC 2403 is an outlying member of the M81 Group,[2] and is approximately 8 million light-years distant. It bears a striking similarity to M33, being about 50,000 light years in diameter and containing numerous star-forming H II regions.[3] The northern spiral arm connects it to the star forming region NGC 2404.[2] NGC 2403 can be observed using 10×50 binoculars.[2]

RGB image of the galaxy NGC 2403 from the Liverpool Telescope

Supernovae

As of late 2004, there had been two reported supernovae in the galaxy: SN 1954J, which attained a magnitude of 16 at its brightest, and SN 2004dj.

SN2004dj
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brezhoneg: Caldwell 7
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norsk: Caldwell 7
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