Messier 88
| Galaxy Messier 88 |
|
|---|---|
|
|
| Shot with a 24 inch reflector | |
| AladinLite | |
| Constellation | Berenike's hair |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 31 m 59.1 s |
| declination | + 12 ° 25 ′ 13 ″ |
| Appearance | |
| Morphological type | SA (rs) b; HII Sy2 |
| Brightness (visual) | 9.4 mag |
| Brightness (B-band) | 10.2 mag |
| Angular expansion | 6.8 ′ × 3.7 ′ |
| Position angle | 140 ° |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Affiliation | Virgo galaxy cluster , LGG 285 |
| Redshift | 7609 ± 10 · 10 −6 |
| Radial velocity | 2281 ± 3 km / s |
|
Stroke distance v rad / H 0 |
(100 ± 7) x 10 6 ly (30.6 ± 2.1) Mpc |
| history | |
| discovery | Charles Messier |
| Discovery date | March 18, 1781 |
| Catalog names | |
| M 88 • NGC 4501 • UGC 7675 • PGC 41517 • CGCG 099-076 • MCG + 03-32-059 • IRAS IRAS 12294 + 1441 • VCC 1401 • GC 3049 • h 1312 • | |
Messier 88 (also known as NGC 4501 ) is a 9.6 mag bright spiral galaxy with an area of 6.8 '× 3.7' in the constellation Coma Berenices . In the Hubble sequence , this galaxy is assigned the type Sb. It was discovered by Charles Messier on March 18, 1781, along with seven other galaxies of the Virgo Galaxy Cluster. The galactic plane of M88 is inclined by about 30 degrees from the line of sight, which gives it a certain resemblance to the Andromeda Nebula, which is also of type Sb.
Like many spiral galaxies in the Virgo Cluster, M88 has a high peculiar velocity ; H. moves at great speed relative to the center of gravity of the heap. The redshift provides a radial velocity of around 2000 km / s, so that the galaxy is moving away from the cluster center at around 700 km / s.
On May 28, 1999 the Type Ia Supernova 1999cl appeared in M88. When it was discovered the following day, the supernova had an apparent magnitude of 16.4 mag and reached its maximum on June 12 with a magnitude of 13.4 mag. Since Type I supernovae are among the best standard candles in cosmology, this event was of great interest in determining the range of the Virgo cluster.
Superimposed images from the Hubble Space Telescope
UV absorption, GALEX
