| NGC 5042 | |
|---|---|
 NGC 5042 imaged by theHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Hydra |
| Right ascension | 13h 15m 31.1269s[1] |
| Declination | −23° 59′ 00.958″[1] |
| Redshift | 0.004637[1] |
| Heliocentric radial velocity | 1,390±1 km/s[1] |
| Distance | 47.88 ± 2.37 Mly (14.680 ± 0.726 Mpc)[1] |
| Apparent magnitude (V) | 11.8[1] |
| Characteristics | |
| Type | SAB(rs)c[1] |
| Size | ~80,800 ly (24.77 kpc) (estimated)[1] |
| Apparent size (V) | 4.2′ × 2.2′[1] |
| Other designations | |
| ESO 508- G 031,IRAS 13127-2343,UGCA 340,MCG -04-31-043,PGC 46126[1] | |
NGC 5042 is anintermediate spiral galaxy in theconstellation ofHydra. Its velocity with respect to thecosmic microwave background for is1,697±22 km/s, which corresponds to aHubble distance of 81.6 ± 5.8 Mly (25.03 ± 1.78 Mpc).[1] However, 15non redshift measurements give a much closer distance of 47.88 ± 2.37 Mly (14.680 ± 0.726 Mpc).[2] It was discovered by British astronomerJohn Herschel on 25 March 1836.[3]
TheHubble Space Telescope's image of NGC 5042 shows its collection ofH II regions, brilliant pink gas clouds in its spiral arms, getting their color from hydrogen atoms that have been ionized by ultraviolet light. Many of these clouds are associated with groups of blue stars, often appearing to form a shell around them.[4]
Media related toNGC 5042 at Wikimedia Commons
