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Type: galaxy, Sb
Mag: B=11.5, V=10.72
Size: 5.495′ x 2.29′
Synonyms: H IV-021
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "vS, stellar, very bright nucleus and vF chevelure, not quite central."
John Herschel recorded it as "F, irregularly round, vsbM, to a star 12th mag, 2 or 3 stars involved, and several bright ones near."
The NGC description reads: "faint, very small, round, very suddenly very much brighter towards the middle like a 12th magnitude star, three stars involved".
pF, 4'x1', mE 25deg, B stellar nucleus; spiral.
pF, 5'x1.5', mE 25deg, B stellar nucleus, see HOB 15.
Photo Index by Jim Lucyk: Burnhams V2 p1100, Hubble Atl.of Gal. (Sandage 1961) p22.
This galaxy appears on page 22 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads S,BM,INC,SEV* SUP BWDDIF SPIRAL ARMS.
Listed by the Herschel Club, described as "nucleus visible, outer area difficult to make out, use averted. Situated with a few field stars close at hand, slight elongation visible. 6-inch, 48x."
Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.8M; 5'x 1.6' extent; large, faint, flat ellipse with much brighter center; axis oriented NNE-SSW; see photo at HAG-22; 100' SE of 3M Beta LEP."
Hartung writes: "In a star-sprinkled field is a fairly conspicuous luminous haze about 2' long and elliptical in PA 45 with a bright stellar nucleus as well as three very faint stars involved S.p. A 4-inch shows little more than the nucleus".
Steve Coe, observing with a 13" f/5.6, notes: "Pretty bright, small, somewhat elongated, brighter in the middle at 100X. Pretty bright star involved near the core on SW side."
05 33.4 -21 57
17.5: fairly faint, fairly large, very elongated 3:1 SSW-NNE, unusually
bright stellar nucleus. A mag 13.5 star is at the W edge 0.7' from center
and a mag 14 star is at the SSW edge of the major axis 1.2' from center.
Located just SW of a thin triangle of mag 9.5-10.5 stars, the closest being
mag 9.3 SAO 170546 1.7' NW of center.
13: faint, elongated, small bright nucleus, fairly small, faint halo
T&B: * WSW V=13.2; * SW V=13.7.
Hubble: gx in pa30. * W 39", SW 1'.2, NNE 55".
15cm - fairly f gx nr a triangle of br *s and w/sev other fntr *s sup. gx in
pa45, 2'.2x0'.8 w/wk even concen. close to center is m12 *, core
sufficiently wk that I can't sep it from *. WSW off halo is m13.5 *;
SW nr maj axis is m14 * (dbl?); m15 * on edge of halo along NW-facing
flank, approx N of center. BS, 28Feb1990, LCO.
- mod f oval elong NE-SW @ 80x, sev *s inv. 140x: halo losfcbr, so hard
to give size, plus *s confusing view. m13 * immed NE of fairly f sub*ar
nuc, m14 * E edge of core, m14.5-15 * along W-facing flank on NE side,
m15 * in SW side partway to end. BS, 17Nov1993, LCO.
25cm - 1'.5x0'.6 elong in nrly pa0. nuc like m12.7 *. on W side is m14 *, on N
end of halo just W of central axis is m14.5 *. lentic halo.
30cm - vbr gx. 140x: sub*ar center; halo 3'.2x1' in pa40. 220x: vbr core is
velong, 10"x6" w/br sub*ar nuc. m13.5 * 50" W of center. 1'.5 SW in halo
is sm *ing or *, m14. 1' NNE of center is sl fntr * or *ing, on W side
of halo. halo not concen. gx is SE of SErn tip of acute triangle
pointing S. interesting.
Observing with a 15.5-inch at 220x the galaxy forms a trapezium with 3 very bright field stars. The galaxy is stellar at first, but then shows extended nebulosity to the north, and to the west lies a bright knot. The knot seems elongated. There is a small star or bright nebulosity to the north of the bright knot. A very interesting object.
16-inch f/10 SCT (101.6x, 127x, 290x)
Slightly elongated soft hazy SSW-NNE oval with more or less the indicated size. The nucleus is quite outstanding, nearly star like in low power (102x). The edges of the oval galaxy is very hazy and fades with nebulosity into the field. Three 10-magnitude stars take a prominent stand to the west and northwest, another one to the SSW, which rounded of this object. Very faint star towards the SW of the nucleus inside the hazy disk.
12-inch f/10 SCT (76x, 218x, 346x)
First impression show this galaxy as a very faint comet, slightly elongated in a SW-NE direction. Higher power brings out the star-like nucleus with a soft hazy edge.
Instrument:12-inch Dobsonian Reflector Telescope.
Sky Conditions:Whole Milky Way is visible.
Transparency of the Sky:The sky is clean.
Seeing:Atmosphere stable with little interference.
Limiting Magnitude:Magnitude 6.
First Impression:This object looks like a faint smudge of light.
Chart Number:No.95(Extract taken out of "Star Gazer's Deep Space Atlas").
Size:26mm Super Wide Field Eyepiece:Field Of View:57'/13=4.3'.
20mm Ultra Wide Angle Eyepiece:Field Of View:
Size in Arc Minutes:4.3'.
Brightness Profile:From the far outskirts of this galaxy the nucleus grows brighter.
Challenge Rating:Very Difficult.
In this galaxy it has a small nucleus with very faint arms which are on the brink of visiblity,although this galaxy looks like a faint smudge of light.The nucleus of this galaxy is strongly concentrated and condensed.However this galaxy looks like a fuzzy object at 75*.
Observing site: Little Tycho Observatory
[5h 33m 24s, -21° 57' 0"] A faint, small, round patch gbm. B: Sb, 11.8mv. WkikSky: looks like an SBb to me.
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