NGC 2403 | |
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![]() A Hubble Space Telescope (HST), and Subaru image of NGC 2403. NGC 2404 is visible | |
Observation data (J2000 epoch) | |
Constellation | Camelopardalis |
Right ascension | 07h 36m 51.4s[1] |
Declination | +65° 36′ 09″[1] |
Redshift | 131 ± 3 km/s[1] |
Distance | 9.65 Mly (2.96 Mpc)[2] |
Apparent magnitude (V) | 8.9[1] |
Characteristics | |
Type | SAB(s)cd[1] |
Apparent size (V) | 21.9′ × 12.3′[1] |
Other designations | |
UGC 3918,[1] PGC 21396,[1] Caldwell 7 |
NGC 2403 (also known as Caldwell 7) is an intermediate spiral galaxy in the constellation Camelopardalis. It is an outlying member of the M81 Group,[3] and is approximately 8 million light-years distant. It bears a similarity to M33, being about 50,000 light years in diameter and containing numerous star-forming H II regions.[4] The northern spiral arm connects it to the star forming region NGC 2404.[3] NGC 2403 can be observed using 10×50 binoculars.[3] NGC 2404 is 940 light-years in diameter, making it one of the largest known H II regions. This H II region represents striking similarity with NGC 604 in M33, both in size and location in galaxy.
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