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  #1  
Old 10-08-2018, 10:22 PM
ngcles's Avatar
ngcles
The Observologist

ngcles is offline
 
Join Date: Dec 2006
Location: Billimari, NSW Central West
Posts: 1,505
Observations -- 9th August 2018

Hi All,

Been a while since I posted any observing notes here but motivated by having a new telescope to play with, I thought I’d share some with you.

These observations were made on the evening of 9th August 2018 at my home in the mid-west of NSW near Billimari – about 15km SW of Canowindra. Cool and clear evening, it was already down to 6 deg C by 7.30pm and by the time I wrapped up at 11.30pm it was 2 deg C. Seeing I’d rate at 6/10 for the whole night, a little light dew towards the end of the session and the SQML reading at commencement was a bit below par for this location at 21.52. It did get darker at the evening wore on and the Zodiacal Light dimmed and by 11pm it was 21.7 – still a bit below average but not too shabby. The gegenschein, around the Capricornus & Aquarius border became evident after 10.30pm I covered more than this in four hours but most of the time was treading well-worn paths to check-up on old mates.

x195 25' TF
NGC 7141 (NGC 7140) Galaxy *
RA: 21h 52m 15.2s Dec: -55° 34' 11"
Mag: 12.2 (B) S.B.: 13.9 B-V: +0.70 Size: 4.1'x2.9' Class: SAB(rs)bc
P.A.: 18 Inclination: --- R.V.: +2950 Source: RC3 *

This is a mod bright, lowish SB, good-sized eg elong in about PA 30. Oval outline about 2.75' x 1.5'. There is a mag 15.5 * embedded in the halo just a little to the W of centre. Lowish SB outer halo with diffuse edges brightening weakly to centre where there is a small, slightly brighter, not well defined core zone that seems to have a very faint *ar nucleus.

x195 25' TF
IC 5120 Galaxy *
RA: 21h 38m 48.5s Dec: -64° 21' 01"
Mag: 14.1 (P) S.B.: --- B-V: --- Size: 1.9'x0.5' Class: SAB(s)bc pec?
P.A.: 107 Inclination: --- R.V.: +3324 Source: RC3 *

This eg seems fainter in the ep than the DSS would suggest. IN about PA 120 and appears as a small, mod faint LSB, 1.25' x 30" lens-shaped oval eg with very diffuse edges, brightens to a weak axial streak near centre though there is no apparent core-zone or nucleus visible.

x195 25' TF
NGC 7096 (IC 5121) Galaxy *
RA: 21h 41m 19.1s Dec: -63° 54' 30"
Mag: 12.8 (B)S.B.: 12.4 B-V: +0.90 Size: 2.0'x1.8'Class: SA(s)a
P.A.: 130 Inclination: --- R.V.: +2928 Source: RC3 *

ESO 107-44 (PGC 67139) Galaxy *
RA: 21h 40m 03.5s Dec: -63° 54' 32"
Mag: 13.9 (P) S.B.: --- B-V: --- Size: 1.0'x0.5'Class: SAB(s)0^?
P.A.: 4 Inclination: --- R.V.: --- Source: RC3 *

ESO 107-45 (PGC 67156) Galaxy *
RA: 21h 40m 26.6s Dec: -63° 48' 40"
Mag: 15.8 S.B.: --- B-V: --- Size: 0.9'x0.5'Class: SB
P.A.: 114 Inclination: --- R.V.: --- Source: PGC *
-96 is a pretty bright, good S.B round eg. pretty easy to see, about 1.25' diameter growing mod end evenly to centre where there is a small, slightly brighter core zone that grows further to centre. There is a mags 14.5/15 pair just outside the halo to the NE, maybe 1' from centre. -44 is due W by about 8'.
-44 is a small to very small glow, set between 14th and 16th mag *s. Very LSB envelope with diffuse edges. Small mod brighter core with a sub-*ar nucleus. 7' NNE is -45.
-45 is a very, very LSB and very faint small glow with no structure. 30-odd arc sec across, round. No structure.

x195 25' TF
NGC 7083 Galaxy *
RA: 21h 35m 45.1s Dec: -63° 54' 08"
Mag: 11.9 (B) S.B.: 13.0 B-V: +0.65 Size: 3.9'x2.3'
Class: SA(s)bc P.A.: 12 Inclination: --- R.V.: +3059

This eg is one field W of NGC 7096 (previous). Elongated, mod bright eg that is oval in outline, 3'' x 1.75' in PA 0, found with mag 14 and mag 15 *s that are just outside the extremities of the halo at the N and S ends. Good SB halo that brightens broadly and slightly to centre and nearer centre there is a large mod brighter, elong core zone containing a v/small non*ar spot nucleus.

x195 25' TF
IC 5130 Galaxy *
RA: 21h 50m 24.5s Dec: -73° 59' 51"
Mag: 14.5 (P) S.B.: --- B-V: --- Size: 1.9'x0.6' Class: SA(s)bc:
P.A.: 109 Inclination: --- R.V.: +7840 Source: RC3 *

PGC 252921 Galaxy*
RA 21h 50m 49.60s Dec -73° 55' 30"
Mag: ? S.B: ? -- B-V -- Size: ? -- Class: ?
PA: ? Inclination: ? R.V: ?
-30 is a small mod faint, elong oval eg in about PA 120 1.25 x 40". Looks a little fainter than the DSS would suggest, quite LSB it points at a * to its ESE, mag 14 about 1.5' from centre. Possesses a small, slightly oval in the same PA slightly brighter core zone but no real nucleus. -921 is 5' away NNE.
-921 is 5' NNE of -30, small, faint, elong in PA 90 quite LSB smudge that isn't too hard to see brightening weakly to centre with no apparent structure.

x195 25' TF
IC 5141 Galaxy *
RA: 21h 53m 17.4s Dec: -59° 29' 39"
Mag: 13.5 (P) S.B.: --- B-V: --- Size: 1.6'x1.2' Class: SA(rs)bc:
P.A.: 30 Inclination: --- R.V.: +4392 Source: RC3 *

ESO 145-21A (PGC 67566) Multi-Galaxy Sys *
RA: 21h 52m 59.5s Dec: -59° 23' 37"
Mag: 16.3 S.B.: --- B-V: --- Size: 1.1'x0.2'Class: S
P.A.: 83 Inclination: --- R.V.: --- Source: PGC *

-31 is a small round eg of pretty good SB, it has to its S mag 9 & 10 8s that make a long tri with -41 making the sharp point. It also has a mag 15 * just outside the halo to the N. Small, round 1.25' diameter weak-edged halo growing broadly and slightly to centre, At centre is a small, slightly brighter core/nucleus zone. ESO 145-21A is 7' NNW. There is a mag 15 * pretty much at the mid-point between the two eg. Is a small, elong haze growing weakly to centre about 30 x 20" with either a faint, mag 14 * superimposed dead centre or a relatively bright (given the size and brightness of the eg) *ar nucleus.

x195 25' TF
IC 5140 Galaxy *
RA: 21h 54m 16.3s Dec: -67° 19' 53"
Mag: 15.1 (P) S.B.: --- B-V: --- Size: 2.0'x0.3' Class: SBd? sp
P.A.: 138 Inclination: --- R.V.: +3972 Source: RC3 *

Well, whoever found this was certainly eagle-eyed. It presents as a thin slender, ephemeral, v/LSB slash of gossamer in about PA 135 imm SW of a mag 13.5 *. 50" x 5" of v/LSB gossamer, detectable with A.V and concentration. No central brightening apparent of other structure.

x195 25' TF
NGC 7151 Galaxy *
RA: 21h 55m 04.7s Dec: -50° 39' 27"
Mag: 13.5 (P) S.B.: --- B-V: --- Size: 2.9'x1.1' Class: SAB(rs)cd
P.A.: 75 Inclination: --- R.V.: +1860 Source: RC3 *

This is a nice, mod faint, lowish SB, diffuse looking oval eg in PA 75. Has a mag 14.5 * embedded in the NW flank of the halo and a mag 15.5 * on the edge of the halo on the SE flank at the W end of the halo opposite the other. Oval, probably 1.5 x 40" in PA 75, growing broadly and weakly to centre with no apparent core, zones or nucleus. Occasionally seems weakly mottled in the halo. Also, seems the halo is slightly narrower at the SW end compared to the NE end that is more rounded in outline.

Continues in Pt 2/
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  #2  
Old 10-08-2018, 10:24 PM
ngcles's Avatar
ngcles
The Observologist

ngcles is offline
 
Join Date: Dec 2006
Location: Billimari, NSW Central West
Posts: 1,505
Obervations 9th August 2018 Pt 2/2

Cont/

x195 25' TF
NGC 7168 Galaxy *
RA: 22h 02m 07.7s Dec: -51° 44' 34"
Mag: 12.9 (B) S.B.: 12.3 B-V: +0.93 Size: 2.0'x1.4' Class: E3
P.A.: 68 Inclination: --- R.V.: +2749 Source: RC3 *

PGC 101233 Galaxy*
RA 22h 02m 18.1s Dec -51° 47' 08"
Mag: ? S.B: ? B-V: ? Size: 0.9' x 0.6' Class: ?
PA: ? Inclination: ? R.V: ? Source: Sky View
Small, easy to see mod faint eg that seems round or weakly elong in about PA 30, 1.25 x 1' growing at first weakly to centre where there is a small, weakly elong in the same PA mod brighter core and occasional *ar nucleus. A mag 14.5 * is a little off the halo SE of centre. 3' SE is PGC 101233.

-233 is 3' SE of -68 and is a weak-edged faint spot about 40" diameter brightening slightly and evenly to centre where there is an occasional small faint sub*ar spot in the centre.

x195 25' TF
NGC 7179 Galaxy *
RA: 22h 04m 49.4s Dec: -64° 02' 50"
Mag: 13.3 (B) S.B.: 13.2 B-V: +0.57 Size: 2.0'x0.8' Class: SB(rs)bc
P.A.: 48 Inclination: --- R.V.: +2890 Source: RC3 *

This is a small oval mod LSB mod faint eg that isn't too hard to see. Has two superimposed faint *s. The eg is in PA 45, the two stars underline the SE flank just on the edge of the halo just inside the NE and SW tips respectively mags 15.5 and 16 respectively. Narrow oval 1.5 x 30", mod LSB halo brightening broadly and slightly to centre where there is a small, elong slightly brighter core zone that at times appears to contain a sub *ar nucleus.

Then there was the showpiece PNe of the whole sky – M27.

x156 31' TF
M 27 NGC 6853 Planetary Nebula *
RA: 19h 59m 36.1s Dec: +22° 43' 13"
Mag: 7.6 (P) Size: 6.7' Class: 3+2 Mag C. Star: 13.9
R.V.: --- Source: Str-ESO *
This is a very bright and very large PNe that is one of the most, if not THE most spectacular in the sky. Big thing, maybe 9 x 7' in about PA 120. The oval disc exhibits a fat hourglass or apple-core across the minor axis that is in this aperture only slightly brighter and of better SB than the two "ends" of the halo at the Maj.A extremities. Oval. Truly spectacular. The brighter regions of the hourglass at x195 exhibit some degree of faint mottling and uneven surface brightness with small irregularities in the outer edges of the halo and there are in total 9 *s peppered over the surface in a starry field. Reacts fairly strongly to the UHC and x156. Without filter seems weakly greenish There is a mag 14 * dead centre that I presume is the central *.

x195 25' TF
NGC 7200 Galaxy *
RA: 22h 07m 09.5s Dec: -49° 59' 43"
Mag: 13.8 (B) S.B.: 12.4 B-V: +0.91 Size: 1.6'x1.2'
Class: E+: P.A.: 33 Inclination: --- R.V.: +2887 Source: RC3 *
A fairly easy to see eg that is in PA 45, pretty good SB and is SW of a mag 15 * by 1.5'. Small oval halo 50 x 40"growing slightly to a largish mod brighter core region with a spot-type non *ar nucleus, overall pretty easy to see.

x195 25' TF
NGC 7216 Galaxy *
RA: 22h 12m 35.6s Dec: -68° 39' 40"
Mag: 13.5 (B) S.B.: 12.4 B-V: +0.95 Size: 1.7'x1.0' Class: SA(rs)0-:
P.A.: 133 Inclination: --- R.V.: +3468 Source: RC3 *
Possesses fairly good SB for such a small eg. Small weakly oval halo in PA 135, no *s in its imm vicinity. Off-round 50 x 40" in PA 135. Seems to be an elliptical eg type brightness profile. Grows from weak edges, slightly at first and then mod & evenly to a small sub *ar spot in the centre that is pretty prominent. Not at all hard to see.

x195 25' TF
IC 5158 Galaxy *
RA: 22h 06m 24.6s Dec: -67° 31' 03"
Mag: 15.2 (P) S.B.: --- B-V: --- Size: 0.9'x0.5' Class: SB(s)m: P.A.: 43
Inclination: --- R.V.: --- Source: RC3 *
This is a small very faint and low SB eg that took a while to pick up in the ep. Few arc mins SW from an 11th mag * Probably 40-odd arc seconds diameter, round ephemeral glow of v/LSB that has no apparent structure brightening weakly to centre.

x195 25' TF x260 19' TF
IC 5173A Multi-Galaxy Sys *
RA: 22h 14m 45.3s Dec: -69° 21' 56"
Mag: 15.9 S.B.: --- B-V: --- Size: 1.0'x0.3'Class: S
P.A.: 78 Inclination: --- R.V.: --- Source: PGC *
Very faint and very, very LSB small eg, seems elong in PA 90 as a small, ephemeral streak of gossamer about 1' x 15" brightening weakly to the axis nr centre but no apparent core or nucleus. Not easy.
Near the end of the session, I dropped in on an old friend, the ring-form lenticular galaxy NGC 7702 in Phoenix. Over the last 15-odd years I’ve observed it many times in the hope of seeing the “ring” as separate from the core as in the photo. It has a remarkable appearance on the DSS – it looks like a botched, underexposed image of Saturn. Tonight, at last, I was successful in seeing “the ring”:

x260 19' TF, x346 14' TF and x156 31' TF
NGC 7702 Galaxy *
RA: 23h 35m 29.1s Dec: -56° 00' 45"
Mag: 13.1 (B) S.B.: 12.5 B-V: +0.92 Size: 2.2'x1.2' Class: (R)SA(r)0+
P.A.: 117 Inclination: --- R.V.: +3122 Source: RC3 *
Small and pretty bright eg with good SB, elong in PA 120. oval, about 1.5 x 1.2' with a broad, moderate brightening to centre which is bright and possesses very good SB but no definite core boundary or nucleus.
Examined for several minutes at higher magnifications to see the "ring" in this ring-form lenticular eg but gave up and swapped the 20mm TII in before slewing to another object. Surprised that on re-focusing, with A.V, the ring is occasionally, fleetingly visible as shown in the DSS image at x156. Went back to the 9mm again and it was very faintly visible in moments of good seeing -- once you know what you're looking for.

Lastly I dropped in on the one of the least-known and least observed G.Cs in the sky – NGC 7492. There are two Messier G.Cs in Aquarius, M2 & the frequently disappointing M72. The latter is probably the least impressive G.C in Messier‘s list of “not-a-comets”. NGC 7492 is much fainter – at best a marginal object for 8-10” ‘scopes, it is one of the most sparse G.Cs attached to the Milky Way. However in 63.5cm, it’s not a bad object and even shows a deal of resolution:

x195 25' TF x156 31' TF
NGC 7492 Globular Cluster *
RA: 23h 08m 26.7s Dec: -15° 36' 41"
Mag: 11.2 Mag V(tip): 15.5 Mag V(HB): 17.6B-V (tip): ---
Size: 4.2' Class: R.V.: --- Source: Archinal *
Been a long time since I last observed this cluster and it is actually a nice object in this aperture. Easily seen and pretty well resolved, about 4 arc mins diameter, round, weakly compressed to centre with no apparent core. two dozen-odd resolved stars magnitudes 15.5 down to threshold peppered over a misty background. Slightly ragged edges

Best,

L.
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