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NGC 5102 (11,368 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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NGC 5102

NGC 5102, AM 1319-362, ESO 382-50, LEDA 46674, MCG-06-29-031, SGC 131907-3622.2, h 3492, GC 3504

RA: 13h 21m 57.78s
Dec: −36° 37′ 47.2″

Con: Centaurus
Ch: MSA:912, U2:370, SA:21


(reference key)

Type: galaxy, S...

Mag: B=10.35, V=9.65

Size: 7.943′ x 2.818′
PA: 48°

Historical observations

John Herschel

Discovered by John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "bright, round, pretty large, pretty suddenly much brighter in the middle to a star." A second sweep recorded it as "very bright, round, pretty large, pretty suddenly much brighter in the middle; 50 arcseconds." His final observation was recorded as "very bright, pretty much elongated, gradually much brighter in the middle."

Published comments

Burnham's Celestial Handbook

Burnham calls this a 10.8 mag spiral galaxy, 6' x 2.5', very bright, large, elongated with a sudden bright nucleus. It is 17' N.f. Iota Centauri.

Helwan Obs. Bulletin No 22 (1921)

B, S, globular nebula with pF atm. mE 50deg; not quite like a spindle.

de Vaucouleurs, G. (1975)

de Vaucouleurs, G. (1975) Nearby groups of galaxies. In: Kuiper, G. (ed) Stars and Stellar Systems. Volume 9: Galaxies and the Universe. Chapter 14, p557.

5. The nearer groups within 10 megaparsecs

G4. NGC 5128 Group

Brightest members: 5236,5128,4945,5102,5068,5253.

Several large southern galaxies having low velocities may form a loose group or chain centred on NGC 5128, 4945, 5102, 5236 and NGC 5253 and possibly NGC 5068. Two (NGC 5102 and perhaps NGC 5128=CenA) are lenticulars, three are late-type spirals Sc-Scd and one (NGC 5253) is peculiar, possibly an I0 irregular (the BGC classificaion Imp is incorrect). The overall length of the chain is 30° = 2.1Mpc or 20° = 1.4 Mpc (excluding NGC 5068 which has the highest velocity). ... Even if this chain does not form a physical (bound) group, it is useful to obtain some estimate of the distance of NGC 5128.

Helwan Obs. Bulletin No 38 (1935)

Confirms HOB22.

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).

This galaxy is a member of the fairly nearby Centaurus group of galaxies, which includes NGC 4945, 5102, 5128, 5236 and NGC 5253.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 10.5 mag galaxy. Their coded description reads LG,B,EL,BM,DIF FEATURELESS.

Schmidt, K.-H. et al. (1993)

Schmidt K.-H., Priebe A. & Boller T. (1993) Nearby galaxies. Revised machine-readable version of the catalogue. Astron. Nachr., 314, 371. [1993AN....314..371S]

Other names: "E382-50,-06-29-031". Inclination: (face-on, in degrees) 71 Total photoelectric blue mag 10.35 Total colour index .72 Logarithm of the angular diameter D25 (arcminutes) 1.94 Blue photographic magnitude 9.96 This galaxy is included in a sample of galaxies with velocity less than 500km/s with respect to the centroid of the Local Group. [Nearby Galaxies. Schmidt K.-H., Priebe A., Boller T. (Astron. Nachr. 314, 371 (1993))]

Sandage & Tammann (1975)

Sandage, A. & Tammann, G. A. (1975) Steps toward the Hubble constant. V - The Hubble constant from nearby galaxies and the regularity of the local velocity field. ApJ, 196, 313-328. [1975ApJ...196..313S]

Sandage and Tammann (1975, Astrophysical Journal, 196, 313-328) includes this galaxy in the NGC 5128 Group. Members include NGC 4945, NGC 5068, NGC 5102, NGC 5128 & NGC 5236.

Modern observations

Tom Lorenzin

Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "10.8M; 6' x 2.5' extent; large and bright, NE-SW-oriented slash with much brighter center; stellar nucleus; 2.5M Iota CEN 15' to SW; 8M star 5' NNE of core; !good supernova prospect!."

Steve Coe

Steve Coe, using a 17.5" f/4.5, notes: "Pretty bright, pretty large, much brighter in the middle and elongated at 100X. Reminds me of a miniature M 31."

Steve Coe, in "SACNEWS On-Line for May 1996", observing with a 17.5" f/4.5 Dobsonian, notes: NGC 5102 shows up as pretty bright, pretty large, much brighter in the middle and elongated at 100X. This galaxy reminds me of a miniature version of M 31 in Andromeda. See if you agree by looking at 13 hr 22.0 and -36 38.

Brian Skiff

7x35mm - only occas vis in glare of iota Cen as vf *ar point. BS, 28May1995, TSP.

AJ Crayon

AJ Crayon, using an 8" f/6 Newtonian, notes: "is a spiral galaxy. It is 10m 5'x2' in position angle northeast with a large bright middle at 100x.

Contemporary observations

Magda Streicher

(no date)

Alldays (22.50S, 20.12E, 770m).

12-inch f/10 SCT (218x, 346x)

Very soft extended haziness with a very strong nucleus. Faint stars circle the galaxy to the north. Nucleus very outstanding. Just 17' north east of Iota. Galaxy show off an elongated shape in NE-SW and I estimate the size about 6 to 7' if I use averted vision.

Richard Ford

2013 March 9th, Saturday



Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.

Instrument:12-inch Dobsonian.

This galaxy has a small elongated structure with two extensions which lies almost edge on is readily noticeable at 75x.This galaxy's shape is well defined and that the nucleus of this galaxy is strongly condensed and I have noticed that there is some areas of uneven brightness being seen around the outskirts of this galaxy.This galaxy measures 3.3'x 2.2'with P.A:NE/SW.

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