NGC 4991 is a spiral galaxy in the constellation of Virgo.[1][2] It is located 835 million light-years from the Solar System. NGC 4991 was first discovered on April 30, 1864 by German astronomer, Albert Marth.[3] It is considered as a radio galaxy by the SIMBAD database.[4] It has an active galactic nucleus and contains high amounts of ionized hydrogen.[2]
| NGC 4991 | |
|---|---|
 The spiral galaxy NGC 4991. | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 13h 09m 15.11s |
| Declination | +02d 20m 51.56s |
| Redshift | 0.056826 |
| Heliocentric radial velocity | 16,554 km/s |
| Distance | 836 Mly |
| Apparent magnitude (V) | 14.7 |
| Apparent magnitude (B) | 15.5 |
| Characteristics | |
| Type | Sb |
| Size | 164,000 ly |
| Apparent size (V) | 0.6' x 0.4' |
| Other designations | |
| PGC 45604, 2MASX J13091510+02200513, IRAS F13066+0237, NVSS J130914+022050, Z 44-13, SDSS J130915.11+022051.5 | |
References
edit- ^ "NGC 4991 - Barred Spiral Galaxy in Virgo | TheSkyLive.com". theskylive.com. Retrieved 2024-04-18.
- ^ a b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-04-18.
- ^ "New General Catalog Objects: NGC 4950 - 4999". cseligman.com. Retrieved 2024-04-18.
- ^ "NGC 4991". simbad.u-strasbg.fr. Retrieved 2024-04-18.