| NGC 3187 | |
| Epoch: | J2000 |
| Ra: | 10h 17m 48s |
| Dec: | +21° 52’ 23” |
| Appmag B: | 13.91 |
| Appmag V: | 13.44 |
| Sbrightness: | 23.35 mag/arcsec^2 |
| Type: | SBsc |
| Constellation Name: | Leo |
| Z: | 0.005290 |
| Dist Ly: | 91 Mly (28.04 Mpc) |
| Size V: | 3.0' x 1.3' |
| Names: | PGC 30068, HCG 44D, VV307b, UGC 5556, CGCG 123-036, MCG +04-24-025, ARP 316 |
| H Radial V: | 1,586 km/s |
| Size: | 85,000 ly (estimated) |
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.
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]