Arp 104 | |
---|---|
![]() NGC 5216: The Keenan System, Arp 104 | |
Observation data ( J2000 [1] epoch) | |
Constellation | Ursa Major [2] |
Right ascension | 13h 32m 08.9s [1] |
Declination | +62° 44′ 02″ [1] |
Redshift | 0.010817 [1] |
Distance | 1.73 × 107 [2] [3] |
Apparent magnitude (V) | 14.0 [4]/12.3 [5] |
Characteristics | |
Type | E0/SBb-pec [6] |
Notable features | bridged [2] |
Other designations | |
Keenan's system
[1]
[2]
NGC 5216/
NGC 5218
[1]
[2] |
Arp 104, also known as Keenan's system, is entry 104 in Halton Arp's Atlas of Peculiar Galaxies catalog for spiral galaxy NGC 5216 and globular galaxy NGC 5218. [2] The two galaxies are joined by a bridge of galactic material spanning 22 000 light years. [2] [3]
In 1790 William Herschel discovered the galaxies, and in 1926 they were studied by Edwin Hubble. [2] In 1935 Philip C. Keenan first published a paper about the bridge connecting the galaxies, [2] [10] which was rediscovered in 1958 at the Lick and Palomar observatories. [2] [3] [11]
Arp 104 | |
---|---|
![]() NGC 5216: The Keenan System, Arp 104 | |
Observation data ( J2000 [1] epoch) | |
Constellation | Ursa Major [2] |
Right ascension | 13h 32m 08.9s [1] |
Declination | +62° 44′ 02″ [1] |
Redshift | 0.010817 [1] |
Distance | 1.73 × 107 [2] [3] |
Apparent magnitude (V) | 14.0 [4]/12.3 [5] |
Characteristics | |
Type | E0/SBb-pec [6] |
Notable features | bridged [2] |
Other designations | |
Keenan's system
[1]
[2]
NGC 5216/
NGC 5218
[1]
[2] |
Arp 104, also known as Keenan's system, is entry 104 in Halton Arp's Atlas of Peculiar Galaxies catalog for spiral galaxy NGC 5216 and globular galaxy NGC 5218. [2] The two galaxies are joined by a bridge of galactic material spanning 22 000 light years. [2] [3]
In 1790 William Herschel discovered the galaxies, and in 1926 they were studied by Edwin Hubble. [2] In 1935 Philip C. Keenan first published a paper about the bridge connecting the galaxies, [2] [10] which was rediscovered in 1958 at the Lick and Palomar observatories. [2] [3] [11]