NGC 3780 is a spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 2,557±12 km/s, which corresponds to a Hubble distance of 123.0 ± 8.6 Mly (37.71 ± 2.65 Mpc).[1] However, 10 non-redshift measurements give a closer mean distance of 109.65 ± 9.10 Mly (33.620 ± 2.789 Mpc).[2] It was discovered by German-British astronomer William Herschel on 14 April 1789.[3]
| NGC 3780 | |
|---|---|
 NGC 3780 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 39m 22.3603s[1] |
| Declination | +56° 16′ 14.452″[1] |
| Redshift | 0.007976±0.00000667[1] |
| Heliocentric radial velocity | 2,391±2 km/s[1] |
| Distance | 109.65 ± 9.10 Mly (33.620 ± 2.789 Mpc)[1] |
| Group or cluster | NGC 3780 group (LGG 247) |
| Apparent magnitude (V) | 12.16[1] |
| Characteristics | |
| Type | SA(s)c[1] |
| Size | ~98,900 ly (30.32 kpc) (estimated)[1] |
| Apparent size (V) | 3.1′ × 2.5′[1] |
| Other designations | |
| IRAS 11366+5632, UGC 6615, MCG +09-19-150, PGC 36138, CGCG 292-014[1] | |
NGC 3780 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[4][5] It also has an active galaxy 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.[6][4]
NGC 3780 group
editSupernovae
editThree supernovae have been observed in NGC 3780:
- SN 1978H (Type II, mag. 16.5) was discovered by Swiss astronomer Paul Wild on 7 November 1978.[9][10][11]
- SN 1992bt (Type II, mag. 16) was discovered by the Leuschner Observatory Supernova Search on 19 December 1992.[12][13][14]
- SN 2024btj (Type II, mag. 18.53) was discovered by the Xingming Observatory Sky Survey (XOSS) on 5 February 2024.[15][16]
See also
editReferences
edit- 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 3780". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 6 August 2025.
- ↑ "Distance Results for NGC 3780". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 6 August 2025.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 3780". Celestial Atlas. Retrieved 6 August 2025.
- 1 2 "NGC 3780". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 August 2025.
- ↑ Toba, Y.; Oyabu, S.; Matsuhara, H.; Malkan, M. A.; Gandhi, P.; Nakagawa, T.; Isobe, N.; Shirahata, M.; Oi, N.; Ohyama, Y.; Takita, S.; Yamauchi, C.; Yano, K. (2014). "Luminosity and Redshift Dependence of the Covering Factor of Active Galactic Nuclei viewed with WISE and Sloan Digital Sky Survey". The Astrophysical Journal. 788 (1): 45. arXiv:1404.4937. Bibcode:2014ApJ...788...45T. doi:10.1088/0004-637X/788/1/45.
- ↑ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D.; Davies, R. I.; Hönig, S. F.; Ricci, C.; Rosario, D. J.; Salvato, M.; Shankar, F.; Stern, D. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society. 494 (2): 1784. arXiv:2003.05959. Bibcode:2020MNRAS.494.1784A. doi:10.1093/mnras/staa766.
- ↑ 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.
- ↑ "LGG 247". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 March 2026.
- ↑ Wild, P. (1978). "Probable Supernova in NGC 3780". International Astronomical Union Circular (3303): 1. Bibcode:1978IAUC.3303....1W.
- ↑ Kirshner, R. P.; Blair, W. P.; Simkin, S. M.; Sadler, E. (1978). "Supernovae". International Astronomical Union Circular (3316): 1. Bibcode:1978IAUC.3316....1K.
- ↑ "SN 1978H". Transient Name Server. IAU. Retrieved 6 August 2025.
- ↑ Treffers, R. R.; Leibundgut, B.; Filippenko, A. V.; Richmond, M. W. (1993). "Supernova 1992bt in NGC 3780". International Astronomical Union Circular (5841): 2. Bibcode:1993IAUC.5841....2T.
- ↑ Filippenko, A. V.; Matheson, T.; Leibundgut, B. (1993). "Supernova 1992bt in NGC 3780". International Astronomical Union Circular (5844): 1. Bibcode:1993IAUC.5844....1F.
- ↑ "SN 1992bt". Transient Name Server. IAU. Retrieved 6 August 2025.
- ↑ "SN 2024btj". Transient Name Server. IAU. Retrieved 6 August 2025.
- ↑ Dyer, M. J.; et al. (2024). "GOTO Transient Classification Report for 2024-02-07". Transient Name Server Classification Report. 2024–371: 1. Bibcode:2024TNSCR.371....1D.
External links
edit
Media related to NGC 3780 at Wikimedia Commons- NGC 3780 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
