NGC 3187

NGC 3187
NGC 3187, as seen during the Sloan Digital Sky Survey
Observation data (J2000 epoch)
Constellation	Leo
Right ascension	10h 17m 48s
Declination	+21° 52’ 23”
Redshift	0.005290
Heliocentric radial velocity	1,586 km/s
Distance	91 Mly (28.04 Mpc)
Apparent magnitude (V)	13.44
Apparent magnitude (B)	13.91
Surface brightness	23.35 mag/arcsec^2
Characteristics
Type	SBsc
Size	85,000 ly (estimated)
Apparent size (V)	3.0' x 1.3'
Other designations
PGC 30068, HCG 44D, VV307b, UGC 5556, CGCG 123-036, MCG +04-24-025, ARP 316

NGC 3187, also known as HGC 44D, is a large barred spiral galaxy located in the constellation Leo. Its velocity relative to the cosmic microwave background is 1,901 ± 22 km/s, which corresponds to a Hubble distance of 28.0 ± 2.0 Mpc (∼91.3 million ly).^[1] NGC 3187 was discovered by Irish physicist George Stoney in 1850.^[2]

The luminosity class of NGC 3187 is III and it has a broad HI line. It also contains regions of ionized hydrogen.^[1]

With a surface brightness equal to 15.30 mag/am^2, NGC 3187 is classified as a low surface brightness galaxy (LSB). LSB galaxies are diffuse galaxies with a surface brightness less than one magnitude lower than that of the ambient night sky.

To date, eight non-redshift measurements yield a distance of 25,700 ± 10,409 Mpc (∼83.8 million ly), which is within the Hubble distance range.^[3]

NGC 3185 (HCG 44c), NGC 3187 (HCG 44d), NGC 3190 (HCG 44a) and NGC 3193 (HCG 44b) form the Hickson Compact Group HCG 44.^[4] The galaxies NGC 3187, NGC 3190 and NGC 3193 appear in the Atlas of Peculiar Galaxies under the designation Arp 316.^[5]

• Leo II Groups
• List of spiral galaxies

• NGC 3187 at NASA/IPAC
• NGC 3187 at SIMBAD
• NGC 3187 at LEDA
• NGC 3187 at SEDS