| NGC 5377 | |
|---|---|
 NGC 5377 imaged by theHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Canes Venatici |
| Right ascension | 13h 56m 17s |
| Declination | +47° 14′ 08″ |
| Redshift | 0.005991 |
| Heliocentric radial velocity | 1,796km/s |
| Distance | 93.9Mly (28.78kpc) |
| Apparent magnitude (V) | 11.46 |
| Apparent magnitude (B) | 12.39 |
| Surface brightness | 23.29 mag/arcsec^2 |
| Characteristics | |
| Type | (R)SB(s)a |
| Size | 111,000ly (33.93kpc) |
| Apparent size (V) | 4.7' x 2.4' |
| Other designations | |
| PGC 49563,UGC 8863, KARA 604,MCG +08-25-052,CGCG 246-027,IRAS 13542+4729 | |
NGC 5377 is an intermediatebarred spiral galaxy located in theconstellation Canes Venatici. Its speed relative to thecosmic microwave background is 1,951 ± 11 km/s, which corresponds to aHubble distance of 28.8 ± 2.0 Mpc (~93.9 millionly).[1] NGC 5377 was discovered by German-British astronomerWilliam Herschel in 1787.
NGC 5377 was used byGérard de Vaucouleurs as a morphological type galaxy SAb in his galaxy atlas.[2][3]
The luminosity class of NGC 5377 is I and it has a broad HI line.[1] NGC 5377 also has anactive galactic nucleus which has been identified as a type 2LINER.[4]
To date, 17 non-redshift measurements yield a distance of 25.918 ± 5.770 Mpc (~84.5 million ly),[5] which is within the Hubble distance range. Note, however, that it is with the average value of independent measurements, when they exist, that theNASA/IPAC database calculates the diameter of a galaxy and that consequently the diameter of NGC 5377 could be approximately 37.7 kpc (~123,000 ly) if Hubble distance is used to calculate it.
With observations from theHubble Space Telescope, a star-formingdisk was observed around the core of NGC 5377. The size of its semi-major axis is estimated at 790 pc (~2,575 light years).[6]
According to a study based on near-infrared K-band luminosity measurements of the nuclei of NGC 5377, asupermassive black hole with an apparent mass of approximately 107.8M☉ (63 million solar masses) exists within the core of the galaxy.[7]
SupernovaSN 1992H (type II, mag. 15)[8] was discovered on February 11, 1992, byWilliam R. Wren of theMcDonald Observatory at theUniversity of Texas at Austin.[9]
NGC 5377 is a member of the NGC 5448 Group according to A.M. Garcia. The group has nine galaxies, includingNGC 5425,NGC 5448,NGC 5481,NGC 5500,NGC 5520, UGC 9056 and UGC 9083.[10]
