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NGC 1433 (2,607 of 18,816)

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NGC 1433

NGC 1433, Dunlop 426, AM 0340-472, ESO 249-14, LEDA 13586, SGC 034027-4722.8, Bennett 21, h 2580, GC 767

RA: 03h 42m 1.5s
Dec: −47° 13′ 19″

Con: Horologium
Ch: MSA:441, U2:391, SA:18

Ref: SIMBAD

(reference key)

Type: galaxy, SBb

Mag: B=10.68, V=9.99

Size: 6.025′ x 4.168′
PA: 88°

Image gallery

Sketches  (1)

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Historical observations

Dunlop, James (1828)

Dunlop, J. (1828) A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere, Observed at Paramatta in New South Wales. Phil. Trans. Roy. Soc., 118, 113-151. [1828RSPT..118..113D]

James Dunlop discovered this galaxy from Paramatta, New South Wales, and included it as No. 426 in his catalogue of 1827. Using a 9-inch f/12 telescope, he described it as "a very faint nebula, about 1' diameter, rather elliptical in the parallel of the equator; with a brightish point or condensation of the nebulous matter, a little to the preceding side of the centre."

John Herschel

John Herschel recorded it as "bright, large, pretty much elongated, suddenly much brighter in the middle; 100 arcseconds long, 60 arcseconds broad" His second observation was recorded as "very bright, large, much elongated, very suddenly very much brighter in the middle to a nucleus = 10th mag star."

Published comments

Stewart (1908) Ann.Harv.Coll.Obs., 60 (6)

Table IV: !! vB, vL, ellips.sp.

Reynolds, J.H. (1921)

Reynolds, J.H. (1921) The spiral nebulae in the zone -40° to -90° (from the Franklin-Adams Plates). MNRAS, 81, 598.

Table, p601. 5x3, "! ring B stellar N, no spiral arms"

Shapley (1935)

Ann.Harv.Coll.Obs., 88 (5)

, "A catalogue of 7889 external galaxies in the Horologium and surrounding regions" Ann.Harv.Coll.Obs. 88, No. 5, 107) notes that "earlier descriptions differ appreciably from the probably more dependable descriptions from the Bruce photographic plates . . . NGC 1433: Not much elongated."

Table II, p 110: Size estimate: 8'

Sulentic & Tifft (1973)

(Sulentic and Tifft 1973) notes that this is a 11.0 mag galaxy.

de Vaucouleurs, G. (1975) NGC 1433 group

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.

Part of the Dorado cloud complex (NGC 1566, NGC 1433, NGC 1672 groups).

Brightest members: 1433 ( B(0) = 10.9), 1512 ( B(0) = 11.58), 1448 ( B(0) = 11.67), 1493 ( B(0) = 12.10), 1411 ( B(0) = 12.16).

("Galaxies and the Universe", Chapter 14 - Nearby Groups of Galaxies) notes that the five brightest members of the NGC 1433 Group, a part of the Dorado Cloud complex, are NGC 1433, NGC 1512, NGC 1448, NGC 1493 & NGC 1411.

Bergwall et.al. (1978)

(Astron. Astrophys. Suppl. 33, 243-255) gives this galaxy's B-magnitude in the Johnson system as 10.8. They remark: "Large number of H II regions in ring and in spiral arms."

de Vaucouleurs, G. et al. (1991) Third Ref. Cat. of Bright Galaxies (RC3)

This galaxy is listed in the "Third Reference Catalogue of Bright Galaxies" as having an outer ring of 5.80 arcminute diameter.

Supernovae

A supernova erupted in this galaxy in 1985 (13.5v).

Photo index

by Jim Lucyk: Cat.of South.Peculiar Gal.and Ass. Vol 2 (Arp&Madore, 1987) p8.1, Cat.of South.Peculiar Gal.and Ass. Vol 2 (Arp&Madore, 1987) p11.6, Cat.of South.Peculiar Gal.and Ass. Vol 2 (Arp&Madore, 1987) p13.3.

Modern observations

Hartung, E.J. (1968) Astron.Obj.South.Tel

Hartung notes: "This nebula is a large faint haze 3' - 4' x 2' in pa 100 deg fading away imperceptibly at the indefinite edges, with a small bright nucleus hardly 20 arcsec across . . 10.5cm shows only this nucleus, hazy and faint."

Brian Skiff

15cm - big br gx w/vbr cen @ 80x. lg vf halo out to m12 * on SW, ~circ. oval

bar elong E-W crosses halo. 140x: halo unconcen and at threshold, bar

has mod broad concen, then circ 15" core vsharply brtr to br *ar nuc.

BS, 14Nov1993, LCO.

Contemporary observations

Magda Streicher

1997 Jul 4, Pietersburg

Location: Pietersburg South 23o 53. East 29o 28.

Sky conditions: Clear.

Date: 4 Julie 1997.

Field of view: 52.7 arc minutes.

ASSA-DSO - Report J

NGC 1433 Mag 10 size 6

Medium to large size galaxy, with a very bright small starlike nucleus surrounded in haziness. Shade out in a soft oval light.

(no date)

8-inch f/10 SCT, 16-inch f/10 SCT

Reasonably large smear or light, immediately visible in the field of view. Quite conspicuous with its soft circular and slightly oval east to west appearance. From a very bright nucleus it shades out soft to form a woolly outer edge (290x). Fainter stars visible in the immediate western portion of the galaxy. Further southwards are two stars that are seemingly double. IC 1984-positioned just 24' arc minutes west of NGC 1433 with a magnitude of 16, to me, is not visible. Dunlop and Herschel called it elliptical. Recent photographs contradict this statement. Star like nucleus at the centre? Dunlop does not think so, Herschel on the other hand does. (Mag 10.0; size 5.5' x 3.2'; SB 13.0; PA 99)

IC 1984-positioned just 24' arc minutes west of NGC 1433 with a magnitude of 16, to me, is not visible.

Tom Bryant

2010 11 5 3:20:20

Observing site: Fall Star Party

Telescope: C-11

[3h 42m 0s, -47 13' 0"] A bright galaxy, small, but very close to the horizon, so no accurate detail was seen. B: SBa.

Richard Ford

2013 February 10th, Sunday

Location:Blesfontein Guest Farm,Sutherland.

Time:9:53pm.

Sky Conditions:The most crystal clear sky possible.Dark moon and stars magnitude 6 and fainter are visible with the naked eye.Excellent clean sky,limited star flickering and brilliant objects.

Instrument:12-inch Dobsonian.

This galaxy's barred like extensions are somewhat too diffuse to see and that this galaxy's oval shape looks like an oval soft glow of faint light with a brilliant nculeus that gently illuminates this galaxy at both 57x and 75x. This galaxy has a somewhat bright nucleus which is condensed.This galaxy measures 4.7'x 2.8'.Chart No.154,NSOG Vol.3.

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