NGC 3746
| NGC 3746 | |
|---|---|
 NGC 3746 (center) with NGC 3745 (left), imaged by Kitt Peak National Observatory | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 11h 37m 43.6312s |
| Declination | +22° 00′ 35.153″ |
| Redshift | 0.030072 |
| Heliocentric radial velocity | 9,015 ± 2 km/s |
| Distance | 449.2 ± 31.5 Mly (137.72 ± 9.65 Mpc) |
| Group or cluster | Copeland Septet |
| Apparent magnitude (V) | 15.01 |
| Characteristics | |
| Type | SB(r)b |
| Size | ~44,400 ly (13.62 kpc) (estimated) |
| Apparent size (V) | 1.1′ × 0.5′ |
| Other designations | |
| Copeland Septet NED02, HCG 057B, 2MASS J11374363+2200353, 2MASX J11374364+2200349, UGC 6597, LEDA 35997, MCG +04-28-005, PGC 35997, CGCG 127-006, SDSS J113743.62+220035.3 | |
NGC 3746 is a large barred spiral galaxy with a ring structure located in the constellation Leo. It is located 449 million light-years from the Solar System and has an approximate diameter of 45,000 light-years. NGC 3746 was discovered by Ralph Copeland on 9 February 1874 with subsequent observations made by Hermann Kobold, Lawrence Parsons and John Louis Emil Dreyer.
The luminosity class of NGC 3746 is II and it has a broad H II region with a recessed core (RET).
Copeland Septet
NGC 3746 is a member of the Copeland Septet which comprises 7 galaxies discovered by Copeland in 1874. The other 6 members are NGC 3745, NGC 3748, NGC 3750, NGC 3751, NGC 3753, and NGC 3754. Together, they are known as Hickson 57 and Arp 320.
Supernovae
Two supernovae have been discovered in NGC 3746:
- SN 2002ar (Type Ia, mag. 16.5) was discovered by Dr W. D. Li from the University of California, Berkeley via unfiltered CCD images which was taken by the 0.8-m Katzman Automatic Imagining Telescope on 3 and 4 February 2002. It was located 3".3 east and 0".5 south of the nucleus.
- SN 2005ba (Type II, mag. 17.5) was discovered on 1 April 2005 by Norwegian scientists Arne Danielsen, Mikkel Steine, and Stale Kildahl via unfiltered images taken from a 'Celestron 14' reflector at Veggli, Norway. It was located 14".6 west and 4".0 north of the nucleus.
References
- 1 2 3 4 5 6 7 8 9 10 11 12 "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-05-01.
- ↑ "HyperLeda -object description". atlas.obs-hp.fr. Retrieved 2024-05-01.
- ↑ Astronomy, Go. "NGC 3746 | galaxy in Leo | NGC List | GO ASTRONOMY". Go-Astronomy.com. Retrieved 2024-05-01.
- ↑ "New General Catalog Objects: NGC 3700 - 3749". cseligman.com. Retrieved 2024-05-01.
- ↑ Bakich, Michael E. (2024-01-01). "Copeland's Septet". Astronomy Magazine. Retrieved 2024-05-01.
- ↑ "Copeland's Septet (Hickson Compact Group 57) – Constellation Guide". www.constellation-guide.com. Retrieved 2024-05-01.
- ↑ "SN 2002ar | Transient Name Server". www.wis-tns.org. Retrieved 2024-05-01.
- 1 2 Li, W. D. (2002). "Supernova 2002ar in NGC 3746". International Astronomical Union Circular (7819): 1. Bibcode:2002IAUC.7819....1L.
- ↑ Filippenko, A. V.; Chornock, R. (2002-02-01). "Supernovae 2002ao, 2002ap, 2002ar, 2002au, 2002av". International Astronomical Union Circular (7825): 1. Bibcode:2002IAUC.7825....1F. ISSN 0081-0304.
- ↑ "SN 2005ba | Transient Name Server". www.wis-tns.org. Retrieved 2024-05-01.
- ↑ Kildahl, S.; Danielsen, A.; Steine, M.; Trondal, O. (2005-04-01). "Supernova 2005ba in NGC 3746". International Astronomical Union Circular (8503): 2. Bibcode:2005IAUC.8503....2K. ISSN 0081-0304.
- ↑ "Bright Supernovae - 2005". www.rochesterastronomy.org. Retrieved 2024-05-01.
- ↑ Foley, R. J.; Ganeshalingam, M.; Wong, D. S.; Swift, B. J.; Filippenko, A. V. (2005-04-01). "Supernova 2005ba in NGC 3746". International Astronomical Union Circular (8510): 2. Bibcode:2005IAUC.8510....2F. ISSN 0081-0304.
