NGC 788
| NGC 788 | |
|---|---|
 NGC 788 imaged by legacy surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 01m 06.4473s[1] |
| Declination | −06° 48′ 55.861″[1] |
| Redshift | 0.013603±0.000093 |
| Heliocentric radial velocity | 4078±28 km/s[1] |
| Distance | 189.4 ± 13.4 Mly (58.08 ± 4.10 Mpc)[1] |
| Group or cluster | NGC 788 Group (LGG 44) |
| Apparent magnitude (V) | 12.76 |
| Characteristics | |
| Type | SA0/a?(s)[1] |
| Size | ~108,400 ly (33.25 kpc) (estimated)[1] |
| Apparent size (V) | 1.6′ × 1.3′[1] |
| Other designations | |
| IRAS F01586-0703, MCG -01-06-025, PGC 7656[1] | |
NGC 788 is a lenticular galaxy located in the constellation Cetus. Its velocity with respect to the cosmic microwave background is 3938 ± 30 km/s, which corresponds to a Hubble distance of 189.4 ± 13.4 Mly (58.08 ± 4.10 Mpc).[1] It was discovered in a sky survey by Wilhelm Herschel on September 10, 1785.[2]
Studies of NGC 788 indicate that it, while itself being classified as a Seyfert 2, contains an obscured Seyfert 1 nucleus, following the detection of a broad Hα emission line in the polarized flux spectrum. The observation also indicated the lowest radio luminosities observed in an obscured Seyfert 1.[3]
Supernova
[edit]One supernova has been observed in NGC 788: SN 1998dj (type Ia, mag. 16) was discovered by the Lick Observatory Supernova Search (LOSS) on 8 August 1998.[4][5]
NGC 788 Group
[edit]NGC 788 is the largest and brightest galaxy in a group of at least five galaxies that bears its name. The other four galaxies in the NGC 788 group (also known as LGG 44) are IC 183, NGC 829, NGC 830 and NGC 842.[6]
Image gallery
[edit]-
Center of NGC 788 imaged by the Hubble Space Telescope
See also
[edit]References
[edit]- ^ a b c d e f g h i "Results for object NGC 788". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 12 December 2024.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 788". Celestial Atlas. Retrieved 12 December 2024.
- ^ "A Hidden Broad-Line Region in the Weak Seyfert 2 Galaxy NGC 788" (PDF). Archived from the original (PDF) on September 7, 2021. Retrieved January 23, 2022.
- ^ Modjaz, M.; Shefler, T.; Halderson, E.; King, J. Y.; Li, W. D.; Treffers, R. R.; Filippenko, A. V. (1998). "Supernova 1998dj in NGC 788". International Astronomical Union Circular (6986): 2. Bibcode:1998IAUC.6986....2M.
- ^ "SN 1998dj". Transient Name Server. IAU. Retrieved 12 December 2024.
- ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
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