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]
| 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 | |
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]
Hickson 44
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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]
See also
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editReferences
edit- ^ a b "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-21.
- ^ "New General Catalog Objects: NGC 3150 - 3199". cseligman.com. Retrieved 2024-07-21.
- ^ "NED Query Results for NGC 3187". ned.ipac.caltech.edu. Retrieved 2024-07-21.
- ^ "Hickson's Compact Groups (HCG) of Galaxies". cseligman.com. Retrieved 2024-07-21.
- ^ "New General Catalog Objects: NGC 3150 - 3199". cseligman.com. Retrieved 2024-07-21.