NGC 5084
| NGC 5084 | |
|---|---|
NGC 5084 by 32 in Schulman Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 13h 20m 16.8346s |
| Declination | −21° 49′ 38.416″ |
| Redshift | 0.005741±0.000010 |
| Heliocentric radial velocity | 1,721±3 km/s |
| Galactocentric velocity | 1,599±6 km/s |
| Distance | 81.87 ± 5.871 Mly (25.1 ± 1.8 Mpc)h−1 0.6774 (Comoving) 97 Mly (29.74 Mpc)h−1 0.6774 (Light-travel) |
| Group or cluster | NGC 5084 Group |
| Apparent magnitude (V) | 12.21 |
| Apparent magnitude (B) | 11.15 |
| magnitude (J) | 8.014±0.018 |
| magnitude (H) | 7.256±0.020 |
| magnitude (K) | 7.058±0.027 |
| Characteristics | |
| Type | S0 |
| Mass | (6–10)×1012 M☉ |
| Size | 769,500 ly × 115,430 ly (235.93 kpc × 35.39 kpc) (diameter; 90% total B-band light) 189,760 ly × 72,048 ly (58.18 kpc × 22.09 kpc) (diameter; "total" magnitude) |
| Apparent size (V) | 12.02′ × 2.75′ |
| Notable features | Supermassive disk galaxy |
| Other designations | |
| ESO 576- G 033, MCG -04-32-004, PGC 46525 | |
NGC 5084 is a Seyfert 2 lenticular galaxy in the constellation of Virgo. It is located at a distance of about 25.1 megaparsecs (81.9 million light-years) from Earth, which, given its apparent dimensions using the 90% total light definition, means that NGC 5084 is 236 kiloparsecs (770,000 light-years) across. It is one of the largest and most massive galaxies in the Virgo Supercluster. William Herschel discovered it on March 10, 1785. It is a member of the NGC 5084 Group of galaxies, which is a member of the Virgo II Groups, a series of galaxies and galaxy clusters strung out from the southern edge of the Virgo Supercluster. The galaxy is seen nearly edge-on, with inclination 86°, and features a warped disk and large quantities of HI gas extending along the disk, probably accumulated after multiple accretions of smaller galaxies. NGC 5084 also possess an active galactic nucleus.