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RA: 13h 29m 19.21s
Dec: +17° 03′ 6.9″
Con: Coma Berenices
Ch: MSA:698, U2:150, SA:14
Type: galaxy, Sc
Mag: B=12.7, V=?
Size: 3.388′ x 2.041′
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy. Their coded description reads S,LGDKLN FONUC WDKNY ARM N,VDIF ARM S.
Houston writes: "NGC 5172 is more than twice the size of NGC 4383 and easily visible in the 4-inch refractor at 100x. I estimate it to be magnitude 12.2. Here again you can use a small telescope to view a galaxy that eluded Herschel."
POSS: m12.5 * 3'.5 in pa60. m14 * 43"(+/-2") in pa31 from center. br *
(SkyCat V=7.4) 10'.6 in pa144. gx in pa95; brtst part in center
is oblique bar in pa~35.
13cm - lies about 4' SW of a m12.5 *. 2'x1', elong ENE-WSW. broad wk concen.
30cm - 125x: elong nrly E-W, a m14 * less than 1' NNE. 2'x1'.25 w/poor even
concen, pa80. 250x: no distinct nuc: smooth gradation in light to halo.
- sl concen @ 125x w/distinct broad circ core 1' diam containing a vf *ar
nuc. halo 2'.25x1'.5, elong E-W. lies 11' NW of m7 *. 250x: middle of
core seems elong almost N-S. m13.5 * lies less than 1' N of center.
Instrument:12-inch Dobsonian Reflector Telescope.
Sky Conditions:The fainter parts of the Milky Way are barely visible with the naked eye.
Transparency Of The Sky:Haziness only visible on the horizon.
Seeing:Atmosphere stable with little interference.
First Impression:This object looks like a galaxy.
Chart Number:No.19(Extract taken out of "Atlas of the Night Sky").
Size:26mm Eyepiece:Field Of View:57'/16=3.5'.
20mm Eyepiece:Field Of View:50'/14=3.5'.
Size In Arc Minutes:3.5'.
Galaxy is 3.5'* 1.1'.
Brightness Profile:From the central outskirts of this galaxy the nucleus grows slightly brighter.
Challenge Rating:Very Difficult.
This galaxy is seen as an oval faint blur of soft light which has a faint galactic nucleus.However I have found some darker areas of uneven brightness around the outskirts of this galaxy.
The Messier objects
The Bennett objects
The Caldwell list
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