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Old 13-04-2008, 05:55 PM
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ngcles
The Observologist

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Join Date: Dec 2006
Location: Billimari, NSW Central West
Posts: 1,592
30 hrs in Heaven -- Observing report Mudgee Star Party NGCLes (Pt 3)

Pt 3 ...

x185 27' TF

IC 608 Galaxy *
RA: 10h 24m 21.0s Dec: -06 02' 20"
Mag: 15.2 S.B.: --- B-V: --- Size: 0.8'x0.4'
Class: Sb P.A.: 106 Inclination: ---
R.V.: --- Source: PGC

This eg is in a pretty blank field, no *s associated. Faint to very faint, probably no more than 20" diameter, round with a weak central brightening and no structure visible. No core or zones.



x185 27' TF

NGC 3246 Galaxy *
RA: 10h 26m 41.7s Dec: +03 51' 44"
Mag: 13.2 (P) S.B.: --- B-V: ---
Size: 2.4'x1.3' Class: SABdm P.A.: 90
Inclination: --- R.V.: +2150 Source: RC3 *

This is found between a mag 8*and a mag 6* close to the field stops to the E and the NW. Seems to be a fat oval elong in PA 90, maybe 1.25' x 50" grows from very diffuse edges broadly and slightly to centre azonally without core or nucleus.



x185 27' TF

IC 609 Galaxy *
RA: 10h 25m 35.5s Dec: -02 12' 55"
Mag: 14.1 (P) S.B.: --- B-V: ---
Size: 1.5'x0.7' Class: SAB(rs)bc pec P.A.: 10
Inclination: 5 R.V.: +12608 Source: RC3 *

Note R.V! This is a fairly small, non-descript LSB, small eg in a field which is pretty blank. To the SE about 15' away is a mag 9*. Seems to be weakly elong in PA 45, about 1' diameter, very diffuse edges, growing broadly and weakly to centre without apparent core or nucleus. With AV is occasionally seems slightly mottled or grainy.

That cleans out most of what remained in my to-do list in Sextans.

Now moving on to several showpiece galaxies on the Virgo/Coma border that I did not have observations for with the 18 under a truly dark sky. The SQ reading at this stage was 21.82 = ZLM of 6.53



x185 27' TF
x138 35' TF

NGC 4216 Galaxy *
RA: 12h 15m 54.2s Dec: +13 08' 58"
Mag: 11.0 (B) S.B.: 12.1 B-V: +0.98
Size: 8.7'x1.7' Class: SAB(s)b: P.A.: 19
Inclination: 6 R.V.: +30 Source: RC3 *

NGC 4206 Galaxy *
RA: 12h 15m 16.6s Dec: +13 01' 30"
Mag: 12.8 (B) S.B.: 14.5 B-V: +0.67
Size: 6.6'x1.1' Class: SA(s)bc: P.A.: 0
Inclination: 6 R.V.: +391 Source: RC3 *

NGC 4222 Galaxy *
RA: 12h 16m 22.4s Dec: +13 18' 26"
Mag: 13.9 (B) S.B.: --- B-V: ---
Size: 4.0'x0.6' Class: Sd: sp P.A.: 58
Inclination: 7 R.V.: +225

These are three wonderful edge on egs -16 is in the middle of the group and is a wonderful and very bright edge on spiral eg in PA 15. Very, very elong, much the brightest, 8' x 1.25' indefinite tips to the halo, good SB halo rising in brightness to the axis nr centre. The outer halo is of quite LSB. there is a fairly small quite elong core, 40" x 10" in the same PA contained a diffuse spot-type nucleus which is not much brighter than the surrounding core. There is to the E, Immediately adjacent to the core on the E flank of the halo. a mag 14*.

South by 10' is -06 which is somewhat fainter but still mod bright eg, very very elong in PA 0. 3.5' x 20" Very faint tips and outer halo, fairly large slightly brighter core zone about 1' x 15" in the same PA only slightly brighter than the halo and no real nucleus. Occasional hint of a very faint string of stellarings nr centre where the nucleus would be. Lowish SB.

-22 is to the NE by 10' from -16 and is a very faint and very LSB streak of very LSB haze and it is close to a distracting mag 9 *has lower SB than -06, skinnier though and shorter, 2.75'x 10" in PA 45, has a very faint star at the NE tip mag 15.5 and nr centre is grows weakly and azonally to the axis but no real core zone or nucleus visible.

Stunning!

A DSS image of this group of excellent edge-on spirals is here:

http://stdatu.stsci.edu/cgi-bin/dss_...e&fov=NONE&v3=



x185 27' TF


M 98 NGC 4192 Galaxy *
RA: 12h 13m 48.2s Dec: +14 54' 00"
Mag: 11.0 (B) S.B.: 13.8 B-V: +0.81
Size: 9.8'x2.7' Class: SAB(s)ab P.A.: 155 Inclination: 6
R.V.: -126 Source: RC3 *

Very, very beautiful and stunning inclined spiral. Very bright in PA 160 and good SB, 9' x 2' in PA 160, with very faint tips to the halo -- diffuse. Inner halo has reasonable to good SB but is azonally. Nearer centre is a small, maybe 50" diameter slightly brighter core with a not much brighter stellaring in centre. No stars immediately associated.



x185 27' TF

M 100 NGC 4321 Galaxy *
RA: 12h 22m 55.0s Dec: +15 49' 25"
Mag: 10.1 (B) S.B.: 13.3 B-V: +0.70
Size: 7.5'x6.3' Class: SAB(s)bc P.A.: 30 Inclination: 1
R.V.: +1579 Source: RC3 *

NGC 4328 Galaxy *
RA: 12h 23m 20.0s Dec: +15 49' 11"
Mag: 14.0 (B) S.B.: --- B-V: ---
Size: 1.3'x0.9' Class: SA0-: P.A.: 88
Inclination: --- R.V.: --- Source: RC3 *

NGC 4322 Galaxy *
RA: 12h 23m 01.7s Dec: +15 54' 21"
Mag: 14.0 (V) S.B.: 14.9 B-V: +0.87
Size: 1.2'x0.8' Class: SB(r)0^: P.A.: 125
Inclination: --- R.V.: --- Source: RC3 *

M100 is a very bright eg witch seems to sit in an I triangle of mag 14 *s just on the edges of the halo or slightly within. The overall SB of the halo is good without being high, generally brightens broadly and slightly to the centre. 7-8', diameter round at centre is a well defined somewhat brighter small, probably 40" diameter core coze that has a very definite edge to it brightening broadly and mod to centre within that core and a hardly brighter spot on the centre. There is a weak hint of spiral structure, Directly S of the core in the outer halo is a weak, broad arc-shaped enhancement about just over 1' long and another similar but even fainter in the NW edge of the halo in about PA 300, about a similar distance from the core.

NGC 4322 is to the N of M100 and another to the E is NGC 4326, both of which are about 6' away from centre. Small spots 30" rising broadly and weakly to centre without nucleus. Both are round -28 is slightly the brighter.



x185 27' TF


M 99 NGC 4254 Galaxy *
RA: 12h 18m 49.5s Dec: +14 25' 02"
Mag: 10.4 (B) S.B.: --- B-V: +0.57
Size: 5.4'x4.7' Class: SA(s)c P.A.: 44
Inclination: 1 R.V.: +2453 Source: RC3 *

Found to the SW of a mag 6.5* which seems a yellowish and has on the E edge of the halo a mag 13 *. Really pretty face on spiral nearly 5' diameter with some structure. The core zone is nearly 1' diameter is obvious and a spiral arm in the outer halo starting in PA 180 heading W and curling out from the halo as it eventually terminates pointing N at about PA 270. Quite LSB outer halo brightening weakly to centre. Not a sharp transition to core but within the core brightens slightly to centre with a faint spot almost dead centre. Halo seems a little lop-sided so that the N side is a little more extensive. Very, very pretty.

And then on to some other galaxies in Virgo:

x185 27' TF

IC 3156 Galaxy *
RA: 12h 19m 44.2s Dec: +09 08' 57"
Mag: 14.8 S.B.: --- B-V: ---
Size: 0.6'x0.5' Class: SBc(s): P.A.: 51
Inclination: --- R.V.: --- Source: PGC *

This is a very very small and faint eg which makes a tiny I tri with two 15th mag *s to te NW about 1.5' away. Round, no more than 20" diameter rising slightly in brightness to the centre. Almost stellar, very, very faint.



x185 27' TF

NGC 4260 Galaxy *
RA: 12h 19m 22.3s Dec: +06 05' 55"
Mag: 11.8 (V) S.B.: --- B-V: +0.92
Size: 3.9'x1.7' Class: SB(s)a P.A.: 54
Inclination: 4 R.V.: +1886 Source: RC3 *

NGC 4269 Galaxy *
RA: 12h 19m 49.2s Dec: +06 00' 53"
Mag: 13.9 (P) S.B.: --- B-V: ---
Size: 1.5'x1.0' Class: S0+ P.A.: 133
Inclination: 4 R.V.: +2552 Source: RC3 *

IC 3155 Galaxy *
RA: 12h 19m 45.3s Dec: +06 00' 20"
Mag: 15.0 (P) S.B.: --- B-V: ---
Size: 1.3'x0.7' Class: S0 sp P.A.: 44
Inclination: --- R.V.: +2062 Source: RC3 *

NGC 4260 is a mod bright elong eg in PA 45. Seems about 2 x 20" with a LSB outer halo and a small bright similarly elong core that is somewhat brighter than the halo and has a mag 14 * just off the NE tip. The NGC 4269 IC 3155 pair is to the SE by 9'.

-69 is distractingly just S of a mag 7 * as a tiny mod faint haze about 20" across rising mod to centre. 1.5' to the SW is IC 3155 that is similar but a little fainter with a very faint spot in the centre.



x185 27' TF

NGC 4273 Galaxy *
RA: 12h 19m 55.9s Dec: +05 20' 33"
Mag: 11.9 (V) S.B.: 12.4 B-V: +0.53
Size: 2.4'x1.5' Class: SB(s)c P.A.: 0
Inclination: 4 R.V.: +2308

NGC 4281 Galaxy *
RA: 12h 20m 21.5s Dec: +05 23' 10"
Mag: 12.3 (B) S.B.: 11.7 B-V: +0.96
Size: 3.2'x1.6' Class: S0+: sp
P.A.: 84 Inclination: 5 R.V.: +2685

NGC 4277 Galaxy *
RA: 12h 20m 03.7s Dec: +05 20' 28"
Mag: 13.4 (V) S.B.: --- B-V: +1.01
Size: 1.2'x1.2' Class: SAB(rs)0/a: P.A.: 124
Inclination: --- R.V.: +2516

NGC 4268 Galaxy *
RA: 12h 19m 47.2s Dec: +05 17' 01"
Mag: 12.8 (V) S.B.: --- B-V: +1.04
Size: 2.0'x0.9' Class: SB0/a: sp
P.A.: 53 Inclination: 6 R.V.: +2335

NGC 4259 Galaxy *
RA: 12h 19m 22.2s Dec: +05 22' 34"
Mag: 14.6 (B) S.B.: --- B-V: +1.02
Size: 1.1'x0.5' Class: S0 sp P.A.: 143
Inclination: 6 R.V.: +2487

IC 3153 Galaxy *
RA: 12h 19m 36.9s Dec: +05 23' 52"
Mag: 15.2 S.B.: --- B-V: ---
Size: 0.5' Class: Sc(r)I-II P.A.: ---
Inclination: --- R.V.: --

NGC 4270 Galaxy *
RA: 12h 19m 49.5s Dec: +05 27' 48"
Mag: 13.1 (B) S.B.: 11.8 B-V: +0.88
Size: 2.3'x1.0' Class: S0
P.A.: 111 Inclination: 6 R.V.: +2323

NGC 4266 Galaxy *
RA: 12h 19m 42.4s Dec: +05 32' 21"
Mag: 14.6 (P) S.B.: --- B-V: ---
Size: 2.8'x0.6' Class: SB(s)a? sp
P.A.: 74 Inclination: 7 R.V.: ---

NGC 4282 Galaxy *
RA: 12h 20m 24.3s Dec: +05 34' 21"
Mag: 14.9 (P) S.B.: --- B-V: ---
Size: 1.2'x0.6' Class: S0? P.A.: 105
Inclination: --- R.V.: +6560

NGC 4287 Galaxy *
RA: 12h 20m 48.6s Dec: +05 38' 26"
Mag: 14.9 S.B.: --- B-V: ---
Size: 2.0'x0.4' Class: S (on-edge)
P.A.: 68 Inclination: --- R.V.: ---

NGC 4300 Galaxy *
RA: 12h 21m 41.5s Dec: +05 23' 05"
Mag: 13.9 (P) S.B.: --- B-V: ---
Size: 2.3'x0.9' Class: Sa P.A.: 40
Inclination: 6 R.V.: +2326

This is a very large group of eg which is dominated by -73 and -81. 81 is the brightest, a bright oval haze about 2.5' x 1.5' in PA 90 rising broadaly and moderately to the axis near centre with a small slightly brighter core zone. -73 is to the SW by about 6'.

-73 is similar to -81 but has a slightly less surface brightness and is elong in PA 0, slightly smaller also it has a small elong slightly brighter core.

-77 is immediately E of -73 as a tiny 15" patch of faint mist with a slight brightening to centre.

-68 is to the SSW of -73 by about 5' as a small elong spindle in PA 45 about 45" x 10" growing slightly to centre where there is a small mod brighter core. Good SB overall.

-50 is W of -73 by about 8' as a tiny scrap of mist to the W of a mag 15 *.

IC 3153 is about 8' NW of -73 as a tiny, tiny scrap of extremely fiant haze with a spot in the centre.

-70 is about 9' N of -73 as a flattened oval of reasonable SB haze in PA 90, mod bright, 1.25 x 15" rising moderately to centre where there is a slightly brighter elong core.

-66 is directly N of -70 by
5' just to the S of a mag 9 * which is very very distracting. A tiny, tiny streak of weak haze in PA 90.

-82 is 10' NE of -70 as a tiny dim patch mist about 10" dia as is -87 with a 14th magnitude * at the W edge. Very tiny and faint.

NGC 4300 is 20' E of -81 as a small mod bright spindle, 1.5' x 10" in PA 45 with a small, round somewhat brighter core and overall has good SB.

Pt 4 to follow ...
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