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NGC 4783 (10,527 of 18,816)

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NGC 4783

NGC 4783, LEDA 43926, MCG-02-33-051, VV 201b, I 136, GC 3294

RA: 12h 54m 36.36s
Dec: −12° 33′ 30.2″

Con: Corvus
Ch: MSA:820, U2:284, SA:14

Ref: SIMBAD

(reference key)

Type: galaxy (in pair), E...

Mag: B=12.5, V=12.8

Size: ?
PA: ?

Historical observations

William Herschel (c.1784)

Synonyms: H I-136

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."

NGC/IC Dreyer (1888, 1895, 1908)

The NGC records it as "pretty faint, pretty small, round, much brighter in the middle, following of double nebula."

Published comments

Shapley, H. & Ames, A. (1932)

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.

Shapley, H. & Paraskevopoulos, J.S. (1940)

Galactic and Extragalactic Studies, III. Photographs of thirty southern nebulae and clusters. Proc. N.A.S., 26, 31-36.

Helwan Obs. Bulletin No 15 (1915)

Two pB nuclei each with atmosphere, the north one follows the south one, distance 41'' at 20deg.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads R,BM,DKPCHS,LINKW/82 COMMON DIF HALO W/82.

Van den Bergh (1961)

Van den Bergh (1961, Astronomical Journal, Vol 66, p566) notes that this galaxy forms a pure pair with NGC 4782 0.7 arcminutes away.

Helwan Obs. Bulletin No 21 (1920)

Confirms HOB 15

Modern observations

Walter Scott Houston

Houston 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."

Hartung, E.J. (1968)

Hartung 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."

Tom Lorenzin

Tom 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."

Sanford (1989) Observing the Constellations

Sanford 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."

Steve Coe

Steve Coe, using a 13" f/5.6, notes: "Pretty bright, pretty small, round, brighter in the middle at 220X. In contact with NGC 4782, forms a pair that looks like a figure 8. NGC 4783 is a little dimmer than 4782."

Brian Skiff

POSS: pair in pa10; on SSW -82 is brtr/bigger, elong N-S.

15cm - diffic, a single amorphous glow.

25cm - sep @ 90x. -82 seems brtr & bigger; pair less than 1' diam. even glow in both gxs.

30cm - 125x: Nrn member is smlr, more sharply concen, 1' diam w/f *ar nuc. Srn gx 1'.5 diam w/even concen but no obvious nuc. halo envelopes both objects, sep 40" in pa15. 250x: Srn gx is perhaps elong N-S and occas a f *ar nuc is vis within, but it is less obvious than in Nrn gx.

5Jun1983, USNO.

Contemporary observations

Magda Streicher

1 Feb 2008

NGC: 4782 & NGC 4783 - CORVUS

Galaxies

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.

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