| NGC 3187 | |
|---|---|
 NGC 3187, as seen during theSloan Digital Sky Survey | |
| Observation data (J2000epoch) | |
| Constellation | Leo |
| Right ascension | 10h 17m 48s |
| Declination | +21° 52′ 23″ |
| Redshift | 0.005290 |
| Heliocentric radial velocity | 1,586km/s |
| Distance | 91Mly (28.04Mpc) |
| Apparent magnitude (V) | 13.44 |
| Apparent magnitude (B) | 13.91 |
| Surface brightness | 23.35 mag/arcsec^2 |
| Characteristics | |
| Type | SBsc |
| Size | 85,000ly (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 asHGC 44D, is a largebarred spiral galaxy located in theconstellation Leo. Its velocity relative to thecosmic microwave background is 1,901 ± 22 km/s, which corresponds to aHubble distance of 28.0 ± 2.0 Mpc (~91.3 millionly).[1] NGC 3187 was discovered by IrishphysicistGeorge Stoney in 1850.[2]
Theluminosity class of NGC 3187 is III and it has a broad HI line. It also contains regions ofionized hydrogen.[1]
With asurface brightness equal to 15.30 mag/am^2, NGC 3187 is classified as alow surface brightness galaxy (LSB). LSB galaxies are diffuse galaxies with a surface brightness less than one magnitude lower than that of theambient 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) andNGC 3193 (HCG 44b) form theHickson Compact GroupHCG 44.[4] The galaxies NGC 3187, NGC 3190 and NGC 3193 appear in theAtlas of Peculiar Galaxies under the designationArp 316.[5]
