NGC 3506

NGC 3506 is a spiral galaxy in the constellation Leo. It is located at a distance of circa 300 million light years from Earth, which, given its apparent dimensions, means that NGC 3506 is about 115,000 light years across. The galaxy has two main spiral arms, with high surface brightness, which can be traced for half a revolution before they fade. One arm splits into four spiral arcs.^[2]

NGC 3506
NGC 3506 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation	Leo
Right ascension	11h 03m 13.0s[1]
Declination	11° 04′ 36″[1]
Redshift	6408 ± 3 km/s[1]
Distance	297 Mly (86 Mpc)[1]
Apparent magnitude (V)	12.6
Characteristics
Type	Sc [1]
Apparent size (V)	1.2′ × 1.1′[1]
Other designations
UGC 6120, MCG +02-28-047, PGC 33379[1]

It is an isolated galaxy.^[3]

Supernovae

Three supernovae have been observed in NGC 3506:

• SN 2003L (Type Ic, mag. 16.9) was discovered by Tom Boles and LOTOSS (Lick Observatory and Tenagra Observatory Supernova Searches) on 12 January 2003.^[4][5] Its spectrum featured a relatively blue continuum, dominated by strong P-Cyg lines of Ca II (H and K) and Fe II and a relatively weaker Si II 635.5-nm line was also visible.^[6]
• SN 2017dfq (Type Ia, mag. 16.5) was discovered by ASAS-SN on 20 April 2017.^[7]
• SN 2021adgz (Type II, mag. 19.408) was discovered by Automatic Learning for the Rapid Classification of Events (ALeRCE) on 4 November 2021.^[8]

Gallery

• 
  NGC 3506 imaged by the HST
• 
  NGC 3506 imaged by SDSS DR14

See also

• UGC 6093 - A nearby barred spiral galaxy