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Deep Sky Observer's Companion – the online database

 

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Entire DOCdb database of 18,816 objects.

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NGC 4645 (10,159 of 18,816)

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NGC 4645

NGC 4645, ESO 322-66, LEDA 42879, MCG-07-26-037, SGC 124125-4128.6, h 3412, GC 3178

RA: 12h 44m 10.2s
Dec: −41° 44′ 58″

Con: Centaurus
Ch: MSA:935, U2:402, SA:21

Ref: SIMBAD

(reference key)

Type: galaxy (in cluster), E

Mag: B=12.79, V=11.68

Size: 2.187′ x 1.318′
PA: 52°

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 "pretty bright, small, pretty suddenly brighter in the middle, 12 arcseconds."

Published comments

Burnham's Celestial Handbook

Burnham calls this a 13.1 mag elliptical galaxy in Centaurus, 1' x 0.6', pretty bright, small, elongated, pretty suddenly brighter in the middle.

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).

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads E,SLEL,BM,.

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.

Modern observations

Brian Skiff

15cm - mod f, vsm, intensely concen to vbr *ar nuc. 40" diam, circ, but seems

elong ~E-W in core. BS, 27Feb1990, LCO.

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