NGC 1022
Galaxy in the constellation Cetus
From Wikipedia, the free encyclopedia
NGC 1022 is a barred spiral galaxy located approximately 68[1] million light years away in the equatorial constellation of Cetus. It was discovered on September 10, 1785, by William Herschel. NGC 1022 is a member of the Cetus-Aries group of galaxies.[3]
| NGC 1022 | |
|---|---|
| |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 38m 32.74s[1] |
| Declination | −06° 40′ 38.96″[1] |
| Redshift | 0.004847[1] |
| Heliocentric radial velocity | 1,453 km/s |
| Distance | 67.7 Mly (20.75 Mpc)[1] |
| Apparent magnitude (V) | 11.34±0.13[2] |
| Apparent magnitude (B) | 12.09±0.13[2] |
| Characteristics | |
| Type | SBa[1] (R')SB(s)a;HII[2] SBa(r)p[3] |
| Apparent size (V) | 2.4′ × 2.0′[2] |
| Other designations | |
| NGC 1022, PGC 10010 | |
This galaxy has a morphological classification SBa,[1] indicating a central bar and tightly wound spiral arms. The elliptical outline of the galaxy has an isophotal axis ratio of 0.78[1] with an angular size of 2.4′ by 2.0′ and a position angle of 115°.[2] The galactic plane is inclined at an angle of 24° to the line of sight from the Earth. The central bar is boxy in shape with narrow spurs that are offset from the main axis.[4]
NGC 1022 is forming new stars at an estimated rate of 1.1 solar masses per year. Infrared observations of the nucleus suggests a high rate of star formation activity.[5] The circumnuclear region is home to three giant H II regions with one at the nucleus, a second to the northeast, and the third slightly to the northwest.[3] The galaxy was observed as part of a Hubble study of black holes.[6]
