Arp 7
From Infogalactic: the planetary knowledge core
| ARP 7 | |
|---|---|
| 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] |
| Type | SB(rs)bc [3] |
| Apparent dimensions (V) | 57.1″ × 52.53″ [3] |
| Apparent magnitude (V) | 12.40[3] |
| Other designations | |
| PGC 024836,[3] APG 7[2] | |
Coordinates: 
08h 50m 30s, −16° 37′ 00″
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).
References
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- Full Arp Atlas
- Arp Atlas image of Arp 7
- Constellation Locator
- SIMBAD Astronomical Database
- NASA/IPAC Extragalactic Database
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