| NGC 5530 | |
|---|---|
 NGC 5530 imaged by theHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Lupus |
| Right ascension | 14h 18m 27.30s[1] |
| Declination | −43° 23′ 22.0″[1] |
| Redshift | 0.003979 ± 0.000007[1] |
| Heliocentric radial velocity | 1,193 ± 2km/s[1] |
| Distance | 39.7 ± 4.6Mly (12.2 ± 1.4Mpc)[1] |
| Apparent magnitude (V) | 11.0[2] |
| Characteristics | |
| Type | SA(rs)c[1] |
| Size | ~74,100 ly (22.72 kpc) (estimated)[1] |
| Apparent size (V) | 4.2′ × 1.9′[1] |
| Other designations | |
| ESO 272- G 003,IRAS 14152-4309,MCG -07-29-013,PGC 51106[1] | |
NGC 5530 is aspiral galaxy located in the constellationLupus. It is located at a distance of about 40 millionlight years from Earth, which, given its apparent dimensions, means that NGC 5530 is about 60,000 light years across.[1] It was discovered byJohn Herschel on April 7, 1837.[3]
NGC 5530 is a member of the NGC 5643 Group, named afterNGC 5643.[4]
NGC 5530 has a flocculent spiral pattern, with multiplespiral arms and spiral fragments with many knots.[5][6] Dust lanes associated with spiral arms are visible across the disk.[5] The galaxy has a smallnucleus[5] with a magnitude 13 field star superimposed. InH-alpha images some faintHII regions are visible, but are hard to distinguish among the starry field.[7] In blue filter the galaxy has an inner pseudoring which has a diameter of 4.6 kpc and accounts for 14% of the total H-alpha emission of the galaxy. The star formation rate of the galaxy is estimated to be1.0±0.4 M☉ based on H-alpha emission.[8] In the nucleus lies anuclear star cluster which has a radius of 2.6 arcseconds.[9]
Onesupernova has been discovered in NGC 5530, SN 2007it. It was discovered visually byRobert Evans on 13 September 2007 at anapparent magnitude of 13.5, lying 24" west and 25" north of the nucleus.[10] It was determined spectrographically as a youngtype II supernova.[11] Further observations lead to its IIP categorisation. There are indications that dust was formed during the supernova, as well as of alight echo. The progenitor star had an estimated mass of 16–27M☉.[12] A search of archival photographs revealed several taken by theAll Sky Automated Survey, including one taken on 6 September 2007.[13] In this image, it was magnitude 12, making SN 2007it the brightest supernova of the year 2007.[14]
