ARP 7 | |
---|---|
![]() Arp 7 by
PanSTARRS | |
Observation data ( J2000 epoch) | |
Constellation | Hydra [1] |
Right ascension | 8h 50m 30.0s [2] |
Declination | −16° 37′ 00″ [2] |
Redshift | 0.018356 ± 0.000027 (5503 ± 8 km/s) [3] |
Distance | 19–273 Mly (5.9–83.7 Mpc) [3] |
Apparent magnitude (V) | 12.40 [3] |
Characteristics | |
Type | SB(rs)bc [3] |
Size | 5,200 ly (1.6 kpc) (75,000 ly (23 kpc)?) (estimated) [a] [3] |
Apparent size (V) | 57.1″ × 52.53″ [3] |
Other designations | |
PGC 024836, [3] APG 7 [2] |
Arp 7 (PGC 24836) is a spiral galaxy in the constellation Hydra. [1] Redshift-independent measurements of its distance vary widely, from 5.9 Mpc to 83.7 Mpc. [3] Its morphological classification is SB(rs)bc, [3] meaning it is a barred spiral galaxy with some ring-like structure.
Arp 7 was imaged by Halton Arp and included in his Atlas of Peculiar Galaxies under the category of 'split arm' galaxies. [4] Five other galaxies are also included in this section of the atlas: Arp 8 ( NGC 497), Arp 9 ( NGC 2523), Arp 10 ( UGC 1775), Arp 11 ( UGC 717), and Arp 12 ( NGC 2608).
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ARP 7 | |
---|---|
![]() Arp 7 by
PanSTARRS | |
Observation data ( J2000 epoch) | |
Constellation | Hydra [1] |
Right ascension | 8h 50m 30.0s [2] |
Declination | −16° 37′ 00″ [2] |
Redshift | 0.018356 ± 0.000027 (5503 ± 8 km/s) [3] |
Distance | 19–273 Mly (5.9–83.7 Mpc) [3] |
Apparent magnitude (V) | 12.40 [3] |
Characteristics | |
Type | SB(rs)bc [3] |
Size | 5,200 ly (1.6 kpc) (75,000 ly (23 kpc)?) (estimated) [a] [3] |
Apparent size (V) | 57.1″ × 52.53″ [3] |
Other designations | |
PGC 024836, [3] APG 7 [2] |
Arp 7 (PGC 24836) is a spiral galaxy in the constellation Hydra. [1] Redshift-independent measurements of its distance vary widely, from 5.9 Mpc to 83.7 Mpc. [3] Its morphological classification is SB(rs)bc, [3] meaning it is a barred spiral galaxy with some ring-like structure.
Arp 7 was imaged by Halton Arp and included in his Atlas of Peculiar Galaxies under the category of 'split arm' galaxies. [4] Five other galaxies are also included in this section of the atlas: Arp 8 ( NGC 497), Arp 9 ( NGC 2523), Arp 10 ( UGC 1775), Arp 11 ( UGC 717), and Arp 12 ( NGC 2608).
{{
cite book}}
: |work=
ignored (
help)