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Type: galaxy, SBab
Mag: B=10.53, V=?
Size: 7.079′ x 5.128′
This barred spiral galaxy was discovered by Winnecke in 1876. His description as recorded in the NGC reads: "Considerably bright, considerably large, round, very much brighter in the middle".
In March 1887 Finlay observed it with the 7-inch Merz refractor at the Royal Observatory, Cape of Good Hope. He described it as a "small round nebula, bright in the middle".
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.
Includes NGC 1209 and NGC 1332 groups.
Brightest members: 1232 ( B(0) = 10.73), 1398 ( B(0) = 10.73), 1187 ( B(0) = 11.21), 1300 ( B(0) = 11.34), 1407 ( B(0) = 11.43).
vF oval ring 5' diameter surrounding a F disc 1.5' diameter with a vB central almost stellar nucleus, 0.5' with a pF axis E 10deg.
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.0 mag galaxy. Their coded description reads S,R,MBM,VEXT OUTSSTR.
Photo Index by Jim Lucyk: Burnhams V2 p904, Hubble Atl.of Gal. (Sandage 1961) p47.
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 includes this galaxy in the Eridanus Group. Members include NGC 1187, NGC 1201, NGC 1232, NGC 1255, NGC 1297, NGC 1300, NGC 1302, NGC 1325, NGC 1325A, NGC 1331, NGC 1332, NGC 1353, NGC 1359, NGC 1371, NGC 1385, NGC 1395, NGC 1398, NGC 1407, NGC 1415, NGC 1426, NGC 1439 & IC 1953.
G. de Vaucouleurs ("Galaxies and the Universe", Chapter 14 - Nearby Groups of Galaxies) notes that the Eridanus Cloud includes the NGC 1209 and NGC 1332 groups. The five brightest members of the Eridanus Group are NGC 1232, NGC 1398, NGC 1187, NGC 1300 & NGC 1407.
This galaxy appears on page 47 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
Included in the CCD-atlas of Ryder S.D. & Dopita M.A. (1993) "An H-alpha Atlas of Nearby Southern Spiral Galaxies" Astrophys.J.Suppl. 88, 415. They note: "As described in Sandage (1961), this is the prototypical example of a SB(r)b, with spiral arms starting tangent to an external ring, itself made up from spiral segments. The H II regions are tightly confined to the inner and outer rings."
Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "10.7M; 4.5'x 3.8' extent; tightly wound, bright barred spiral with brighter center; see photo at HAG-47."
17.5: very bright, moderately large, elongated 2:1 N-S, 2.2'x1.1', well concentrated with a very bright 30" rounder core and a stellar nucleus.
8: fairly bright, moderately large, round, bright core.
Steve Coe, observing with a 13" f/5.6, notes: "Pretty bright, pretty large, round, very much brighter middle at 135X."
From: "Neat Southern Planetaries - VII."
NGC 1398/ MCG-04-09-040 (03388-2521) is a 'face-on' Sbc spiral galaxy and the brightest in this selection. Telescopically, its size appears 4.0'x3.4'min.arc. and is visibly elongated along PA 100O. At 10.9 photographic magnitude (B-V=0.95 U-B=0.43), it can be found some 1.4O ESE of NGC 1398 and is placed in Sky Atlas 2000.0. Although the galaxy is bright enough to be found in a 15cm., a 20cm. will do much better. The featureless core of the galaxy is particularly obvious, and by using averted vision in a 25cm., a faint ring in the outer portions of the spiral arms can just be discerned. Scott Mellish (UNIVERSE 43,12 &44,1) in his series "Sky Sketches Post Mortem" states; "No arm structure is present and at 140X the object is reasonably large..." Like many galaxies that appear 'face on', the low surface brightness 'kills' the majesty of this object. Professional photos show an internal ring with a bar, that I couldn't see, though larger apertures may see this. Measured red-shifts are stated between 1 491kms-1 and 1 524kms-1, giving a distance of about seventy-five million light years.
POSS: symmetrical---no sharp SE flank. core pa~7, halo pa~100. located 7' E/sl N of m10.5-11 *.
6cm - just vis as a patch 8' E and a little N of m9 *.
15cm - mod br, circ w/occas brtr center and *ar nuc just vis over it. 1'.5 diam.
- pretty br well concen gx @ 80x. vf extensive halo reaches at least 1/2 way to m13.5 * SE, elong SE-NW, 6:5 ratio. 140x: approx circ core is 1'.5 w/strong sharp concen to vbr *ar nuc. BS, 17Nov1993, LCO.
25cm - 1'.5 diam, 20" core w/nrly *ar nuc. seems elong in pa45, from sharp dk SE flank. sometimes pa135, too. pretty br, vis @ 50x.
30cm - br. strong smooth concen to a br *ar nuc. elong N-S, 1'.5x1'. br inner core.
12-inch f/10 SCT (EP: 2-inch 40mm SW 76x 53' fov; 2-inch 14mm UW 218x 23' fov; 2-inch 8.8mm UW 346x 15' fov)
A large round galaxy, brightens to a compact but not star like nucleus. Displays a soft and flimsy appearance, especially towards the outer edges (218x). NGC 1412 situated 40' arc minutes to the south.
Observing site: Fall Star Party
[3h 38m 54s, -26° 20' 0"] A bright, round, elliptical. B: SBb. WikiSky: The bar is engulfed in a bright halo, lending the appearance of an elliptical.
Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.
This galaxy has a fairly large circular shape which looks like a soccer ball at 75x.The nucleus of this galaxy is compact and is seen as a bright mist of light.Some areas of uneven brightness are noticed around the far outskirts of this galaxy and that this galaxy is well defined.This galaxy measures 4'x 4'.Chart No.198,NSOG Vol.1.
The Messier objects
The Bennett objects
The Caldwell list
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