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Arp 7: Difference between revisions

Coordinates: Sky map 08h 50m 30s, −16° 37′ 00″
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== External links ==
== External links ==
* [https://ned.ipac.caltech.edu/level5/Arp/Arp_contents.html Full Arp Atlas]
* [https://ned.ipac.caltech.edu/level5/Arp/Arp_contents.html Full Arp Atlas]
* [https://ned.ipac.caltech.edu/level5/Arp/Arp2.html Arp Atlas image of Arp 7]
* [https://web.archive.org/web/20160304073601/https://ned.ipac.caltech.edu/level5/Arp/Arp2.html Arp Atlas image of Arp 7]
* [http://djm.cc/constellation.html Constellation Locator]
* [http://djm.cc/constellation.html Constellation Locator]
* [http://simbad.u-strasbg.fr/simbad/ SIMBAD Astronomical Database]
* [http://simbad.u-strasbg.fr/simbad/ SIMBAD Astronomical Database]

Revision as of 13:32, 18 October 2016

ARP 7
Observation data (J2000 epoch)
ConstellationHydra [1]
Right ascension8h 50m 30.0s[2]
Declination−16° 37′ 00″[2]
Redshift0.018356 ± 0.000027 (5503 ± 8 km/s)[3]
Apparent magnitude (V)12.40[3]
Characteristics
TypeSB(rs)bc [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).

References

  1. ^ a b Seligman, Courtney. "Celestial Atlas: PCG Objects 24500 - 24999". Retrieved 2015-11-25.
  2. ^ a b c SIMBAD Astronomical Database. Retrieved 2015-11-25. {{cite book}}: |work= ignored (help)
  3. ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for ARP 007. Retrieved 2015-11-25.
  4. ^ Arp, Halton (1966). "Atlas of Peculiar Galaxies". Figure 1. Retrieved 2015-11-25.