| NGC 1602 | |
|---|---|
 NGC 1602 (left) by Legacy Surveys dr10 | |
| Observation data (J2000epoch) | |
| Constellation | Dorado |
| Right ascension | 04h 27m 54.9s[1] |
| Declination | −55° 03′ 28″[1] |
| Redshift | 0.005230 ± 0.000027[1] |
| Heliocentric radial velocity | 1,568 ± 8 km/s[1] |
| Distance | 66.2 ± 4.2Mly (20.3 ± 1.3Mpc)[1] |
| Group orcluster | Dorado Group |
| Apparent magnitude (V) | 12.9[2] |
| Characteristics | |
| Type | IB(s)m pec:[1] |
| Apparent size (V) | 1.9′ × 1.1′[1] |
| Notable features | Interacting withNGC 1596 |
| Other designations | |
| ESO 157-32, AM 0426-550, IRAS04267-5510,PGC 15168 | |
NGC 1602 is abarred irregular galaxy in the constellationDorado. The galaxy lies about 65 millionlight years away from Earth, which means, given its apparent dimensions, that NGC 1602 is approximately 50,000 light years across.[1] It was discovered byJohn Herschel on December 5, 1834.[3] It is a member of theDorado Group.[4]
NGC 1602 has been categorised as amagellanic spiral galaxy inThe Carnegie Atlas of Galaxies. It features many knots which correspond to brightHII regions.[5] The shape of the galaxy in ultraviolet appears as irregular as the optical one. NGC 1602 appears distorted in radiowaves, with the halo extending to and nearly overlapping with nearbyNGC 1596.[6] The separation of the two galaxies is 3 arcminutes.[7] InH-alpha + [N II] a ring and a large complex of HII regions are visible west of the nucleus.[8] The hydrogen morphology and kinematics are regular within the stellar disk.[9]
NGC 1602 is surrounded by an extended hydrogen envelope, measuring 11.9 by 13.4 arcminutes across as imaged in thehydrogen line with an estimated total mass of(2.5±0.1)×109 M☉. The hydrogen imaging shows two tidal tails, one to the north north-west and the other one to the north north-east of NGC 1602, that is indicative ofinteraction with NGC 1596. The interaction started less than one billion years ago and NGC 1596 has accreted some of the hydrogen.[7]
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