NGC 2748 | |
---|---|
Observation data ( J2000.0 epoch) | |
Constellation | Camelopardalis |
Right ascension | 09h 13m 43.037s [1] |
Declination | +76° 28′ 31.23″ [1] |
Redshift | 0.004930 [2] |
Heliocentric radial velocity | 1,473 km/s [3] |
Distance | 61.3 Mly (18.79 Mpc) [3] |
Apparent magnitude (V) | 11.7 [4] |
Characteristics | |
Type | SAbc [5] |
Apparent size (V) | 2.250 × 0.720 arcmin [2] |
Other designations | |
UGC 4825, MCG +13-07-019, PGC 26018 [2] |
NGC 2748 is a
spiral galaxy in the northern
circumpolar constellation of
Camelopardalis,
[6] located at a distance of 61.3
megalight-years from the
Milky Way.
[3] It was discovered September 2, 1828 by
John Herschel.
[6] The
morphological classification of SAbc
[5] indicates this is an
unbarred spiral with moderate to loosely-wound
spiral arms. It is a disk-like
peculiar galaxy with a stellar shell that is rotating about the main galactic axis. This shell was most likely formed through the capture and disruption of a
dwarf companion.
[7] The galactic nucleus likely contains a
supermassive black hole with a mass of 4.4+3.5
−3.6×107
M☉, or 44 million times the
mass of the Sun.
[5]
A magnitude 14.5 supernova, designated SN 1985A, was discovered in this galaxy on January 25, 1985. It was located 3″ west and 10″ south of the galaxy's nucleus, [8] and was later classified as a type Ia supernova. [9] On August 31, 2013, a supernova event was reported at a position 19″ west and 21″ north of the core of NGC 2748. It was designated SN 2013ff and reached magnitude 15.2. Subsequent studies found a best match to a type Ic supernova. [10] The discovery of a supernova impostor in this galaxy was announced February 10, 2015. [11] During September 2017, the discovery of supernova SN2017gkk in host galaxy NGC 2748 was announced. [12]
NGC 2748 | |
---|---|
Observation data ( J2000.0 epoch) | |
Constellation | Camelopardalis |
Right ascension | 09h 13m 43.037s [1] |
Declination | +76° 28′ 31.23″ [1] |
Redshift | 0.004930 [2] |
Heliocentric radial velocity | 1,473 km/s [3] |
Distance | 61.3 Mly (18.79 Mpc) [3] |
Apparent magnitude (V) | 11.7 [4] |
Characteristics | |
Type | SAbc [5] |
Apparent size (V) | 2.250 × 0.720 arcmin [2] |
Other designations | |
UGC 4825, MCG +13-07-019, PGC 26018 [2] |
NGC 2748 is a
spiral galaxy in the northern
circumpolar constellation of
Camelopardalis,
[6] located at a distance of 61.3
megalight-years from the
Milky Way.
[3] It was discovered September 2, 1828 by
John Herschel.
[6] The
morphological classification of SAbc
[5] indicates this is an
unbarred spiral with moderate to loosely-wound
spiral arms. It is a disk-like
peculiar galaxy with a stellar shell that is rotating about the main galactic axis. This shell was most likely formed through the capture and disruption of a
dwarf companion.
[7] The galactic nucleus likely contains a
supermassive black hole with a mass of 4.4+3.5
−3.6×107
M☉, or 44 million times the
mass of the Sun.
[5]
A magnitude 14.5 supernova, designated SN 1985A, was discovered in this galaxy on January 25, 1985. It was located 3″ west and 10″ south of the galaxy's nucleus, [8] and was later classified as a type Ia supernova. [9] On August 31, 2013, a supernova event was reported at a position 19″ west and 21″ north of the core of NGC 2748. It was designated SN 2013ff and reached magnitude 15.2. Subsequent studies found a best match to a type Ic supernova. [10] The discovery of a supernova impostor in this galaxy was announced February 10, 2015. [11] During September 2017, the discovery of supernova SN2017gkk in host galaxy NGC 2748 was announced. [12]