Galaxy in the constellation Leo
NGC 3746 Constellation Leo Right ascension 11hr 37m 43.622s Declination +22d 00m 35.38s Redshift 0.030072 Heliocentric radial velocity 9,015 km/s Distance 449 Mly (137.66 Mpc ) Group or cluster Copeland Septet Apparent magnitude (V) 15.0 Type SB(r)b, RET Size 165,000 ly PGC 35997, UGC 6597, CGCG 127-006, MCG +04-28-005, Copeland Septet NED02, 2MASX J11374364+2200349, HCG 057B, 2MASS J11374363+2200353, WBL 343-001, NSA 139936, SDSS J113743.62+220035.3, LEDA 35997
NGC 3746 is a large barred spiral galaxy with a ring structure[ 1] Leo constellation.[ 2] light-years from the Solar System and has an approximate diameter of 165,000 light-years.[ 3] Ralph Copeland on 9 February 1874 with subsequent observations made by Hermann Kobold , Lawrence Parsons and John Louis Emil Dreyer .[ 4]
The luminosity class of NGC 3746 is II and it has a broad H II region with a recessed core (RET).[ 3]
Supernovae
Two supernovae have been discovered in NGC 3746 so far: SN 2002ar and SN 2005ba.
SN 2002ar
SN 2002ar[ 5] 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.[ 6] [ 6] Type la .[ 7] [ 5]
SN 2005ba
SN 2005ba[ 8] Norwegian scientists Arne Danielsen, Mikkel Steine, and Stale Kildahl via unfiltered images taken from a 'Celestron 14' reflector at Veggli, Norway .[ 9] [ 10] Type II .[ 11] [ 8]
Copeland Septet
Sloan Digital Sky Survey image of NGC 3746 alongside other members of Copeland Septet .NGC 3746 is a member of the Copeland Septet which comprises 7 galaxies discovered by Copeland in 1874.[ 12] NGC 3748 , NGC 3754 , NGC 3753 , NGC 3750 , NGC 3745 and NGC 3751 . Together, they are known as Hickson 57 and Arp 320.[ 13]
References
^ "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 . ^ a b "Your NED Search Results" . ned.ipac.caltech.edu . Retrieved 2024-05-01 .^ "New General Catalog Objects: NGC 3700 - 3749" . cseligman.com . Retrieved 2024-05-01 .^ a b "SN 2002ar | Transient Name Server" . www.wis-tns.org . Retrieved 2024-05-01 .^ a b "IAUC 7819: 2002ar; 2002as; 2002ao; Corrs" . www.cbat.eps.harvard.edu . Retrieved 2024-05-01 .^ 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 . ^ a b "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 . ^ 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 . 
