Monday, 14 August 2017

#112 Hercules NGC Project Part 6: Uranometria Chart A-9

The 26 closeup charts in the all-sky edition of Uranometria are my favourite thing about this atlas.  I only wish there were 25 more!  Chart A-9 is called "Hercules Galaxy Cluster, A 2151."  It contains portions of regular Charts 69, 88, and 87.  In addition to Abell 2151, three other Abell galaxy clusters are included, as well as a number of other nearby galaxies.  I managed to find all of the NGCs and ICs on this chart, and several UGCs and MCGs.  So here we go....

ABELL 2151

eg 6040:  1'.4 x 0'.5:  Vis. 14.2; SB 13.6:  6040 is very elongated, even at 136x, and fairly bright
eg 6040B: 0'.8 x 0'.8: Vis. 14; SB 13.4:   with averted vision.  40B is round, and not too small.  It sits very close to 40, south, and both are close to the 6041 pair.  Even at high power (200x) I can see 5 galaxies!  All are seen best with averted vision.
http://www.ngcicproject.org
eg 6041A:  1'.2 x 1'.1:  Vis. 13.3; SB 13.5:  41A is bright and easy at 187x, appearing elongated to
eg 6041B:  0'.3 x 0'.3:  Vis. 15.6; SB 12.9:     the south.  At 200x and 250x, 41B is glimpsed just south.  It has a stellar core, and a tiny bit of space between it and the main galaxy.  41A is pretty large and bright; 41B is tiny and round, showing mostly its bright core.

eg 6042:  0'.8 x 0'.7:  Vis. 13.9; SB 13.2:  The 5th of 5 galaxies seen tonight (June 23rd, 2016) in a very tight area.  All 5 are located south following a 6.5 mag. star.  42 is quite small and faint, as viewed at 136x and 187x.  It was somewhat easier to see at 200x and 250x, though still very small.

eg 6044:  0.6 x 0.6:  Vis. 14.3; SB 13:  100x gives a possible sighting of a suspicious object.  125x clearly shows a small, faint, round galaxy.  150x and 187x show it considerably better, looking like a ghostly planetary nebula.  200x shows a bright center, but overall it is fading in this range.
http://www.ngcicproject.org

eg 6043A: 0'.5 x 0'.5:  Vis. 14.3; SB 12.7:  43A was not difficult with averted vision at 150x.  6045
eg 6045:   1'.3 x 0'.3:  Vis. 13.9; SB 12.8:   was challenging and difficult to see steadily.  6047 was
eg 6047:   0'.8 x 0'.8:  Vis. 13.5; SB 13.1:    tricky due to a 12 mag. star close to it.
http://www.ngcicproject.org

eg 6050:   0'.8 x 0'.5:  Vis. 13.5; SB 13.1:  This was oval, quite faint, but not that small.  It was seen also at 200x and 250x.  The object is actually a pair of intersecting galaxies seen face-on, though it appears as one object to the eye.
http://www.ngcicproject.org
eg 6054:  0'.7 x 0'.4:  Vis. 15.2; SB 13.7:  82 was the least difficult, seen pretty well at 187x, 200x,
eg I. 1182: 1' x 0'.5:  Vis. 14.2; SB 13.3:   and 250x.  It was large, bright with averted vision, and
eg I. 1184: 0'.8 x 0'.4: Vis. 14.2; SB 12.9:  oval.  It was further from the 12 mag. star which all 3 galaxies are near.  54 was located by finding 6050, then letting the much smaller and fainter galaxy pass by in the field.  84 came past the field almost immediately following 54, with the 12 mag. star barely south and in between them.  54 was seen at 250x with averted vision, close to the star; 84 is small and tricky, a tiny oval ghost shape at 250x with averted vision.

eg 6055:  1' x 0'.6:  Vis. 13.7; SB 13:  55 was seen well at 125x.  It was oval, and though not 
eg 6057:  0'.6 x 0'.5: Vis. 14.7; SB 13.4:   terribly bright, it wasn't that hard to spot.  57 was first seen at 150x, immediately following 55.  187x and 200x show the smaller one as round.  It was very small, and best with averted vision.

http://www.ngcicproject.org

eg 6056:  0'.9 x  0'.5:  Vis. 13.9; SB 12.9:  Confirmed at 125x, it was seen best with averted vision as an elongated slash.  It was noticeably brighter at 150x, especially the center.  187x gave the best view, showing a fairly large slash.  It was fading at 200x, except for the center.
http://www.ngcicproject.org

eg I. 1178:  1'.2 x 1'.1:  Vis.  14; SB 14.1:  Viewed at 136x and 187x.  It was pretty faint, between two stars, and near avery faint star.


ABELL 2147 and 2152 

There are no NGC objects in these clusters, though 47 has an IC.  I managed to find 3 objects in 47, and 2 in 52. 

ABELL 2147
 eg I. 1165:  0'.8 x 0'.5:  Vis. 14.2; SB 13.1:  Viewed at 136x and 187x, and not too bad at 250x.  It is very oval, not snall, but pretty faint.  It lies within a checkmark star pattern.  These stars are all very faint.  the galaxy, along with the following 2 stars, are withing Abell 2147.

eg UGC 10143:  2' x 1'.1:  Vis. 13.1; SB 13.9:  Observed well at 136x, 187x, and 250x, this galaxy is a nice big oval with a star involved.  It lies not far from another faint star.  It is pretty large and pretty bright, and was definitely the best of the evening.  How did the NGC and IC surveys miss it?

eg C108-81:  0'.8 x 0'.4:  Vis. 14.1; SB 12.7:  Viewed at 187x and 250x, it is very faint and very small.  It is slightly oval, and has 2 faint stars following.  Use averted vision.

ABELL 2152
eg M+3-41-83:  0'.8 x 0'.8:  Vis. 13.8; SB 13.4:  Spotted at 136x, it is a bit easier to view than 41-95, below.  It is still pretty faint.  187x shows it as pretty large compared to 41-95.  It begins to fade at 200x.

eg M+3-41-95:  0'.8 x 0'.8:  Vis. 14.3; SB 13.8:  Spotted at 136x, but it is elusive.  It is involved with or is very near to a faint star, sometimes giving it an ovalish appearance.  187x and 200x give satisfactory views, though it is small and faint.  It is near a mag. 12 (?) star.  One other galaxy lies within Abell 2152 on the Uranometria chart, but I did not attempt it at this time.

The Rest of the Galaxies 

These galaxies are lie outside the Abell circles on Chart A-9.  I will list them in order of R.A. 

eg I. 1151:  2'.5 x 0'.8:  Vis. 12.9; SB 13.6:  Positioned on the far preceding edge of Chart A-9, this galaxy lies within Serpens Caput.  It was large, elongated, and pretty faint, but decent views were had at 125x and 150x.  Worth a stopover. 

eg I. 1155:  0'.9 x 0'.7:  Vis. 14.3; SB 13.6:  It lies just preceding Abell 2147, and sits just within Serpens Caput.  It was spotted at 136x, north preceding a 7.9 mag. star.  The galaxy appears oval at 187x, and is best seen with averted vision.  It is pretty faint, but not too small.

eg NGC 6028:   1'.3 x 1'.2:  Vis. 13.5; SB 13.8:  6028 was observed well at 150x and 187x.  It was
eg M+3-41-33:  0'.9 x 0'.8:  Vis. 13.7; SB 13.3:  faint, though brighter and larger than the M+3 galaxy.  M+3 seemed easier when at lower powers, but at 150x and 187x it appeared smaller and not as bright as 6028.  Both sit amongst a nice star field.
http://www.ngcicproject.org
The M+ galaxy is out of the field, north of the bright star.

eg 6030:  1'.1 x 0'.8:  Vis. 12.8; SB 12.5:  The sighting was confirmed at 100x, where it appeared pretty bright, large, and oval.  Views were very good at 150x and 187x.  Though the galaxy began to fade at 200x, a stellar core was now noted, surrounded by brighter haze and then an outer, fainter envelope.  This is one of the better galaxies on Chart A-9.
http://www.ngcicproject.org

eg M+3-41-47:  0'.7 x 0'.5:  Vis. 13.8; SB 12.7:  Spotted at 100x, it resembled a tiny planetary nebula.  More size was evident at 187x, where it became oval.

eg 6034:  1'.1 x 0'.8:  Vis. 13.5: SB 13.4:  Confirmed at 125x, the galaxy lay close to a 13 mag. (?) star.  It was seen best with averted vision, even at 200x.  It was oval at high power.
http://www.ngcicproject.org

UGC 10195: 1'.5 x 0'.4: Vis. 14; SB 14.7:  At an average mag. of 14.35, this is one of the fainter objects ever picked off the Aragorn Observatory!  Itwas elongated at 150x and 200x, ghostly and flaring with averted vision.

eg 6061:  1'.1 x 0'.8:  Vis. 13.6; SB 13.2:  The galaxy is oval, faint, and cradled by 3 faint stars south.  Though less than impressive, it was observed at 100x, 125x, 150x, and 187x.  Just north is R Hercules.  On my visit (July 15th/15) the variable star was a ruddy colour, and approx. mag. 11.
http://www.ngcicproject.org

UGC 10204: 1' x 0'.6: Vis. 13; SB 12.3:  If this galaxy wasn't so close to a 7.9 mag. star it would be a rather good object, and likely on the NGC list.  Even so it is a pretty bright galaxy.  Spotted at 100x, it appeared better at 136x.  It is oval and has a bright stellar core.  At 187x and 200x the galaxy is still very bright, and very oval.

eg 6073:  1.3 x 0'.7:  Vis. 13.5; SB 13.3:  Spotted at 100x and 136x, it was oval and pretty faint.  Situated between a 10.5 mag. and an 11.5 mag. star, it is closer to the brighter one.  At 187x and 200x it appears very oval.  It now shows a brighter middle and possibly a stellar core.
http://www.ngcicproject.org

eg M+3-41-141: 0'.9 x 0'.4:  Vis. 14.4; SB 13.2: Spotted at 136x (!) and 187x, it was very oval, pretty faint, and not too small.  the center is noticeably brighter.  It is preceding a mag. 11.5 star.

Mapman Mike

 


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