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Type: galaxy, S0a
Mag: B=13.66, V=?
Size: 1.412′ x 0.588′
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Synonyms: H II-485
Discovered in November 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "Four. The preceding two [NGC 833 & NGC 835] both F, E, S, within 1' distance, in the parallel. The following two [NGC 838 & NGC 839] both pF, pS, E, about 2' distant and nearly in the direction of the meridian."
Observed by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "vF, S, R; the last of a group of four."
An observer using the 72-inch f/8.8 speculum telescope at Birr Castle noted "[NGC 833, NGC 835, NGC 838 and NGC 839] Nov. 29, 1856. All are S, R, bM."
Recorded in "Observations of the Southern Nebulae made with the Great Melbourne Telescope".
See the discussion of Lithograph M.1.7 for the details.
pF, pS, vmE 80deg, spindle.
This group consists of NGC 833, NGC 835, NGC 838 and NGC 839. The grouping is listed as No. 318 in Arp's "Atlas of Peculiar Galaxies" (Astrophysical Journal Supplement, vol. 14, 1966.) He remarks "faint, diffuse streamers, peculiar galaxies."
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads EL,BM.
The Messier objects
The Bennett objects
The Caldwell list
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