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Type: galaxy (in pair), E...
Mag: B=13, V=12.75
The NGC records it as "pretty faint, pretty small, round, much brighter in the middle, preceding of double nebula."
Synonyms: H I-135
Discovered in 1786 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "Two [NGC 4782 & 4783]; both cB, cS, R, mbM. Distance 1' near meridian chevelure mixed."
Two pB nuclei each with atmosphere, the north one follows the south one, distance 41'' at 20deg.
Conirms HOB 15.
Shapley, H. & Ames, A. (1932) A survey of the external galaxies brighter than the thirteenth magnitude. Annals Harvard College Obs., 88(2), 43.
Position given in NGC corrected by that published by Reinmuth's Die Herschel Nebel.
Galactic and Extragalactic Studies, III. Photographs of thirty southern nebulae and clusters. Proc. N.A.S., 26, 31-36.
(Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads R,BM,SLDIF,DKPCHSSUS COMMON DIF HALO W/83.
, Astronomical Journal, Vol 66) notes that this galaxy could be a radio source. He remarks: "Double elliptical."
Van den Bergh (1961, Astronomical Journal, Vol 66, p566) notes that this galaxy forms a pure pair with NGC 4783 0.7 arcminutes away.
A supernova erupted in NGC 4782 in 1956 (12.2p)
Notes this galaxy is "probably too faint for a four-inch, but should be within the grasp of an 8-inch. NGC 4782 and 4783 are almost touching one another. These twin elliptical galaxies are 0.5' across with phgotographic magnitudes of 12.9, but are a bit brighter visually. They lie about half a degree due north of an 8th mag star, and I suggest searching for them with a magnification of about 100x."
writes: "In this field sprinkled thinly with faint stars is a double nebula, the components very similar, round, about 35 arcsec across, considerably brighter to the centre and in contact in PA 20 . They are not bright but a 4-inch will show them faintly. Photographs show nebular material connecting them."
writes: "[these] two galaxies [NGC 4782 & NGC 4783] .. share a common envelope of faint stars. This 12th magnitude pair makes a triangle with NGC 4792 and NGC 4794."
Coe, using a 13" f/5.6, notes: "Pretty bright, pretty small, round, brighter in the middle at 220X."
Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12M each; 1' diameter each; both are EL GALS separated on a N-S line by about 40"; both are soft, round blurs with little brighter centers; this pair bears radio source designation of 3C 278; SP GAL N4794 (14M; 2' x 1' extent) is 10' to E and a little S; it's a very soft oblong slash whose little brighter center is bracketed closely by 13M and 14M stars, each no more than 20" from the core."
NGC: 4782 & NGC 4783 - CORVUS
RA: 12h54m.6s - DEC: -12o34'
Magnitude: 12.3 & 12.7 – Size: 2.3'x1.3'
Tel: 12" S/C – 218x – 346x - Date: 1 Feb 2008 – Site: Alldays - good
What a strange sight to see a double galaxy with an two wide eye impression. It reminds me of the double nebulae NGC 2731&2 in Gemini, just much bigger. With higher power the southern NGC 4782 seems a tat brighter than the northern member NGC 4783. Both appear slightly brighter to the middle which cause a soft halo around the nucleuses. Around 7' towards the NE the much fainter NGC 4792 could be seen as a small soft elongated E-W haze. Dubbed the dumbbell nebula.
The Messier objects
The Bennett objects
The Caldwell list
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