NGC 4688
| Galaxy NGC 4688 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 47 m 46.5 s |
| declination | + 04 ° 20 ′ 10 ″ |
| Appearance | |
| Morphological type | SB (s) cd / LINER / HII |
| Brightness (visual) | 12.0 mag |
| Brightness (B-band) | 12.7 mag |
| Angular expansion | 3.2 ′ × 2.8 ′ |
| Position angle | 123 ° |
| Surface brightness | 14.2 mag / arcmin² |
| Physical data | |
| Affiliation |
NGC 4472 group LGG 292 |
| Redshift | 0.003289 ± 0.000003 |
| Radial velocity | 986 ± 1 km / s |
|
Stroke distance v rad / H 0 |
(41 ± 3) · 10 6 ly (12.6 ± 0.9) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 17, 1786 |
| Catalog names | |
| NGC 4688 • UGC 7961 • PGC 43189 • MCG + 01-33-013 • GC 3218 • H III 543 • h 1429 • HIPASS J1247 + 04 • EVCC 1167 • HOLM 461A | |
NGC 4688 is an active barred spiral galaxy with extensive star formation from Hubble type SBc in the constellation Virgo to the ecliptic . It is estimated to be 41 million light years from the Milky Way and about 40,000 light years in diameter. Together with LEDA 43205 it forms the pair of galaxies Holm 461 .
The type IIL supernova SN 1966B was observed here.
The object was discovered on April 17, 1786 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "eF, pL".