NGC 1003
Spiral galaxy in the constellation Perseus
From Wikipedia, the free encyclopedia
NGC 1003 is a spiral galaxy at the western edge of the Perseus constellation.[9] It is located at a distance of about 36 million light years from the Milky Way and is receding with a heliocentric radial velocity of 624 km/s.[4] This galaxy was discovered by the Anglo-German astronomer William Herschel on October 6, 1784, who described it as "pretty faint, large, extended 90°±, much brighter middle, mottled but not resolved".[10] It is a member of the NGC 1023 group of galaxies.[6]
| NGC 1003 | |
|---|---|
NGC 1003 from the Hubble Space Telescope | |
| Observation data (J2000[1] epoch) | |
| Constellation | Perseus |
| Right ascension | 02h 39m 16.893s[2] |
| Declination | +40° 52′ 20.25″[2] |
| Redshift | 0.002090[3] |
| Heliocentric radial velocity | 624 km/s[4] |
| Distance | 30.94 ± 1.40 Mly (9.486 ± 0.429 Mpc)[5] |
| Group or cluster | NGC 1023 group[6] |
| Apparent magnitude (B) | 12.1[3] |
| Characteristics | |
| Type | SAcd[7] |
| Mass | 299+28 −26×1010[8] M☉ |
| Mass/Light ratio | 0.70+0.16 −0.15[8] M☉/L☉ |
| Size | ~63,000 ly (19.32 kpc) (estimated)[5] |
| Notable features | Warped disk[7] |
| Other designations | |
| IRAS 02360+4039, UGC 2137, MCG +07-06-051, PGC 10052[3] | |
The morphological class of NGC 1003 is SAcd, which means it is an unbarred spiral galaxy (SA) with somewhat loosely-wound spiral arms (cd). It is inclined by an angle of 70° to the line of sight from the Earth, with the major axis aligned along a position angle of 276°. The visual disk of the galaxy shows a substantial warping in the eastern side, turning it almost face on. The estimated star formation rate is 0.40 M☉·yr−1.[7] It has a virial mass of 3×1012 M☉ and a mass-to-light ratio of 0.7.[8]
