NGC 6993
Galaxy in the constellation Capricornus
From Wikipedia, the free encyclopedia
NGC 6993 is a large barred spiral galaxy in the constellation of Capricornus. Its velocity with respect to the cosmic microwave background is 5,824±18 km/s, which corresponds to a Hubble distance of 280.2 ± 19.6 Mly (85.91 ± 6.02 Mpc).[1] It was discovered by American astronomer Francis Leavenworth on 8 July 1885.[2]
Right ascension20h 53m 54.0499s[1]
Declination−25° 28′ 20.920″[1]
| NGC 6993 | |
|---|---|
NGC 6993 imaged by Pan-STARRS | |
| Observation data (J2000 epoch) | |
| Constellation | Capricornus |
| Right ascension | 20h 53m 54.0499s[1] |
| Declination | −25° 28′ 20.920″[1] |
| Redshift | 0.020277±0.00000900[1] |
| Heliocentric radial velocity | 1,733±9 km/s[1] |
| Distance | 280.2 ± 19.6 Mly (85.91 ± 6.02 Mpc)[1] |
| Apparent magnitude (V) | 14.5[1] |
| Characteristics | |
| Type | SB(r)cd[1] |
| Size | ~204,500 ly (62.69 kpc) (estimated)[1] |
| Apparent size (V) | 1.3′ × 1.1′[1] |
| Other designations | |
| ESO 529- G 011, IRAS 20509-2539, 2MASX J20535406-2528210, MCG -04-49-007, PGC 65671[1] | |
NGC 6993 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.[3][4]
Galaxy group
Supernova
One Supernova has been observed in NGC 6993:
- SN 2020pvb (Type IIn, mag. 21.04) was discovered by Pan-STARRS on 18 July 2020.[7] This supernova was initially detected during a pre-explosion outburst, with the actual supernova occurring several weeks later.[8] Spectral signatures and a plateau-like light curve led scientists to classify SN 2020pvb as Type IIn-P, similar to SN 1994W, SN 2009kn, and SN 2011ht.[8]
Image gallery
NGC 6993 imaged by the Hubble Space Telescope
