NGC 5474

NGC 5474 is a peculiar dwarf galaxy in the constellation Ursa Major. It is one of several companion galaxies of the Pinwheel Galaxy (M101), a grand-design spiral galaxy.^[4][5] Among the Pinwheel Galaxy's companions, this galaxy is the closest to the Pinwheel Galaxy itself.^[4] The gravitational interaction between NGC 5474 and the Pinwheel Galaxy has strongly distorted the former. As a result, the disk is offset relative to the nucleus.^[4][6] The star formation in this galaxy (as traced by hydrogen spectral line emission) is also offset from the nucleus.^[6] NGC 5474 shows some signs of a spiral structure. As a result, this galaxy is often classified as a dwarf spiral galaxy, a relatively rare group of dwarf galaxies.

NGC 5474
Hubble image of NGC 5474.[1]
Observation data (J2000 epoch)
Constellation	Ursa Major[2]
Right ascension	14h 05m 01.6s[3]
Declination	+53° 39′ 44″[3]
Redshift	273 ± 9 km/s[3]
Distance	21.2 ± 2.2 Mly (6.5 ± 0.7 Mpc)[3]
Apparent magnitude (V)	11.3[3]
Characteristics
Type	SA(s)cd pec[3]
Size	27,500 ly (8.43 kpc) (estimated)[3]
Apparent size (V)	4.8′ × 4.3′[3]
Other designations
UGC 9013,[3] PGC 50216[3]

See also

• Peculiar galaxy
• Dwarf galaxy
• Ursa Major (constellation)