Arp 251

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Arp 251
Arp 251.png
Observation data (Epoch J2000)
Constellation(s) Cetus
Right ascension 00h53m
Declination -13°51'
Number of galaxies3

Arp 251 is a group of three spiral galaxies. The galaxies (2MASX J00534840-1351148, 2MASX J00534765-1351358 and 2MASX J00533671-1349541) are visible in the constellation Cetus. [1] Arp 251 is cataloged in the Atlas of Peculiar Galaxies, [2] which is a catalog of unusual galaxies put into groups based on purely morphological criteria. Arp 251 belongs to the class of galaxies with signs of splitting. [3]

Contents

Galaxies

Source: [4]

2MASX J00534840-1351148

2MASX J00534 is the northernmost galaxy in Arp 251. It spans 30 arc-seconds in apparent view, which corresponds to a diameter of 170,000 light years.  The upper arm is disturbed, meaning that galaxy interaction may be present.  

2MASX J00534765-1351358

2MASX J005347 is the southernmost galaxy out of the triplet and has a magnitude of 15.1. It's visual magnitude is unknown.

2MASX J00533671-1349541

2MASX J005446 has a magnitude of 16.4 and a redshift distance of 700 million+ light-years. It has a larger angular size than the other galaxies making up Arp 251.

See also

References

  1. ↑ Ford, Dominic. "The Arp's Catalog Of Peculiar Galaxies in Cetus". In-The-Sky.org. Retrieved 2024-04-22.
  2. ↑ "Halton Arp's Atlas of Peculiar Galaxies". cseligman.com. Retrieved 2024-04-22.
  3. ↑ "ARP Atlas of Peculiar Galaxies". ned.ipac.caltech.edu. Retrieved 2024-04-22.
  4. ↑ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-04-22.
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