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NGC 4706 (10,352 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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NGC 4706

NGC 4706, ESO 323-1, LEDA 43411, MCG-07-26-055, SGC 124708-4100.5, h 3427, GC 3234

RA: 12h 49m 54.15s
Dec: −41° 16′ 46.4″

Con: Centaurus
Ch: MSA:934, U2:402, SA:21


(reference key)

Type: galaxy (in cluster), S...

Mag: B=13.8, V=?

Size: 1.348′ x 0.676′
PA: 24°

Historical observations

John Herschel (1847) Cape Observations

Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "vF, vS, R, psbM, 10 arcseconds."

Published comments

Helwan Obs. Bulletin No 22 (1921)

No nebula here. Exposure 80 minutes. See No. 275, Table II.

No 275: " B, vS, alm.stell." The reported position is 12:44:03, -40°29.9 (1900)

de Vaucouleurs, G. (1956)

De Vaucouleurs (1956) "Survey of bright galaxies south of -35° declination", Mem. Mount Stromlo, No. 13. (photographic study, plates taken with the 30-inch Reynolds reflector, 20-inch diaphragm). In the Notes: note 'no neb here' in Helwan Bull 22 is wrong and it is not = Helwan 276; measured coordinates [RA] as in NGC, [Dec] 2.2' n of NGC pos.]

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a galaxy. Their coded description reads R,BM,ELDIF HALO.

Sandage (1975)

Sandage (1975(Astrophysical Journal, 202, 563-582) notes that this galaxy is a member of the Centaurus Cluster. Members include NGC 4645, NGC 4677, NGC 4683, NGC 4696, NGC 4706, NGC 4709, NGC 4743, NGC 4744 & NGC 4767.

Shobbrook (1966)

Shobbrook (1966, Mon. Not. R. astr. Soc., Vol 131, p351-363) notes that this member of the Centaurus Cluster has V = 13.10, B-V = 1.07 and U-B = 0.54. It measures 1.1 by 0.4.

Modern observations

Bahr-Vollrath, Gerd (1992)

Gerd Bahr-Vollrath (Noosa Heads, Queensland, Australia) observing with an 8-inch f/12 SCT, writes in The Webb Society Nebulae and Clusters Section Report No. 10, July 1992: "One of the many faint and challenging galaxy clusters in Centaurus. All of these galaxies were at the threshold of visibility, and some may even have been a product of my imagination. The galaxies appeared as very indistinct diffuse glows, barely brighter than the background sky. Definitely a challenge for 20-cm telescopes."

Brian Skiff

ESO-LV: B=14.0.

15cm - pretty f, vsm. elong NE-SW, 25"x15" w/mod sharp concen to sub*ar nuc. BS, 27Feb1990, LCO.

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