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Type: galaxy (in pair), E
Mag: B=13.3, V=?
Size: 1.38′ x 1.23′
NGC 4458. See NGC 4443.
Synonyms: H II-121
Discovered on the night of 12 April 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "Two. Both pF S bM." The other object is NGC 4461.
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.5 mag galaxy. Their coded description reads E,R,BM.
Markarian (1961, Astronomical Journal, Volume 66, p555-557) suggests that this galaxy is part of a slightly bent physical chain of galaxies extending over about 1.5 degrees in the Virgo cluster. The eight galaxies forming this chain are NGC 4374, NGC 4406, NGC 4435, NGC 4438, NGC 4458, NGC 4461, NGC 4473 & NGC 4477. Markarian reaches the conclusion, based on a probabilistic argument, that "the chain of galaxies in the Virgo cluster is not a chance grouping but a real physical system."
AJ Crayon, using an 8" f/6 Newtonian, notes: "is a galaxy. At 80X it is 2' 12m, over and out!"
Observing site: Pinnacles overlook
[12h 29m 0s, 13° 15m 0s] Makes a pair with the brighter ngc 4461. HNGC lists this as 11.8 mv, but it looks fainter than that. It also lists it as an elliptical, but it was too faint for me to guess.
Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.
This galaxy's shape is somewhat small as a round golf ball that is out of focus as a very pale glow of grey light.The central core of this galaxy is moderately compact and that this galaxy's central core is visible at both 57x and 75x.This galaxy measures 3.8'x 2.9'.
The Messier objects
The Bennett objects
The Caldwell list
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