NGC 702
| Galaxy NGC 702 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 01 h 51 m 18.8 s |
| declination | -04 ° 03 ′ 07 ″ |
| Appearance | |
| Morphological type | SB (s) bc pec + comp |
| Brightness (visual) | 13.1 mag |
| Brightness (B-band) | 13.9 likes |
| Angular expansion | 1.2 ′ × 0.8 ′ |
| Position angle | 140 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Redshift | 0.035304 ± 0.000053 |
| Radial velocity | (10,584 ± 16) km / s |
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Stroke distance v rad / H 0 |
(474 ± 33) · 10 6 ly (145.4 ± 10.2) Mpc |
| diameter | 165,000 ly |
| history | |
| discovery | William Herschel |
| Discovery date | September 20, 1784 |
| Catalog names | |
| NGC 702 • PGC 6852 • MCG -01-05-043 • IRAS 1487-0418 • Arp 75 • GC 419 • H III 192 • h 158 • | |
NGC 702 = Arp 75 is a bar-spiral galaxy of the Hubble type SB (n) bc pec in the constellation Whale in the southern sky . It is around 474 million light years away from the Milky Way and has a diameter of around 165,000 light years . Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class spiral galaxies with a small companion of high surface brightness on one arm (Arp catalog) .
The galaxy was discovered on September 20, 1784 by William Herschel .
Web links
Commons : NGC 702 - collection of images, videos, and audio files
