Astronomy:Arp 251
| Arp 251 | |
|---|---|
 | |
| Observation data (Epoch J2000) | |
| Constellation(s) | Cetus |
| Right ascension | 00h53m |
| Declination | -13°51' |
| Number of galaxies | 3 |
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]
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
- Halton Arp
- Hickson 40
- Lists of galaxies
References
- ↑ Ford, Dominic. "The Arp's Catalog Of Peculiar Galaxies in Cetus" (in en). https://in-the-sky.org//data/catalogue.php?cat=Arp&const=22.
- ↑ "Halton Arp's Atlas of Peculiar Galaxies". https://cseligman.com/text/arpatlas.htm#arp251.
- ↑ "ARP Atlas of Peculiar Galaxies". https://ned.ipac.caltech.edu/level5/Arp/Arp_figure2.html.
- ↑ "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=ARP+251&extend=no.
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