| 词条 | NGC 262 |
| 释义 |
| name = NGC 262 | image = SDSS_NGC_262_sdss.org.jpg | image_size = 250px | caption = NGC 262 as imaged by the SDSS. | epoch = J2000 | ra = {{RA|00|48|47.14154}}[1] | dec = {{DEC|+31|57|25.08}}[1] | constellation name = Andromeda | type = S0a | dist_ly = 287 million light-years (88 Mpc)[3] | appmag_v = 13.1 | size_v = 1,1' × 1,1' | notes = | names = 2MASX J00484711+3157249, UGC 499, Markarian 348 [1] }} NGC 262 (also known as Markarian 348) is a huge spiral galaxy in the cluster LGG 14.[1] It is a Seyfert 2 spiral galaxy located 287 million light years away in the constellation Andromeda.[3] It was discovered on September 17, 1885 by Lewis A. Swift. SizeThis galaxy has an apparent diameter of approximately 1.3 million light-years, occupying 1.1' of the Earth's sky.[7] It holds approximately 15 trillion stars.{{citation needed|date=June 2016}} NGC 262 was tidally disturbed by the gravitational forces of smaller galaxies, which resulted in its large size.[2] NGC 262 is very unusual, since it is 10 times larger than a regular spiral galaxy of its type.[3] According to Morris and Wannier, NGC 262 is surrounded by a huge cloud of neutral hydrogen[3] that is probably caused by the tidal stripping of smaller galaxies. The cloud has an apparent mass of approximately 50 billion solar masses at a distance of 88 kiloparsecs (287,000 light-years) [3] from the nucleus of NGC 262 and extending up to 300 kiloparsecs (1 million light-years) away.[3] The cloud is spiral shaped with at least one arm, and possibly another one extending throughout the galaxy. References1. ^1 2 3 {{cite web | title=SIMBAD query result | work=Basic data for NGC 262 | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%20262}} {{galaxy-stub}}2. ^1 {{cite news | title=The New York Times | work=Distant galaxy found to be largest known | url=https://www.nytimes.com/1987/03/13/us/distant-galaxy-found-to-be-largest-known.html| date=1987-03-13 }} 3. ^1 2 3 4 5 {{cite journal | doi = 10.1086/183246 | title = The optical properties of the unusual galaxy Markarian 348 | journal = The Astrophysical Journal | volume = 238 | pages = 11–12 | date = May 15, 1980 | bibcode =1980ApJ...238L..11H | last1 = Huchra | first1 = J. }} 6 : Seyfert galaxies|Andromeda (constellation)|NGC objects|Markarian galaxies|Unbarred lenticular galaxies|Astronomical objects discovered in 1885 |
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