Tuesday, December 3, 2024

27 november 2024 assorted deep sky from home

Predicted perfectly transparent skies, but at my low altitude it was hazy.  Seeing was average at best.  I received an adapter to fit my Televue 40mm plossl to my filter wheel, intending to get closer image scale for night vision.  It worked, and I could reach focus no problem.  I intended to continue observations of flat galaxies, but something was off.  Not just my inaccurate pointing accuracy, but the combination of closer image scale, which made extended objects less contrasty, and the relatively small entrance pupil to the NV device, starving it of light, conspired to make the flat galaxies more difficult to observe.  I needed to stick with the brighter and larger objects on the list and soon ran out of suitable targets.  I observed a few other DSOs and had a worth-while night, but not all it could have been.

NGC 100: 00h 24m 02.7s  +16°29'11" 13.9 5.4 x 0.6' 
Extremely faint and diffuse, seen at first with high gain.  Non-stellar core and very thin tapered tips, 8x1 elongated NW-SW. 

NGC 1003: 02h 39m 16.89 +40° 52′ 20.25″ V = 11.5;  Size 5.5'x1.9'
Fairly bright, moderately large, significantly mottled, 3:1 nearly E-W, the core is offset to the W.  A faint star just off the NW of the core.


NGC 1023 = Arp 135: 02 40 23.8 +39 03 48 V = 9.4;  Size 8.7'x3.0'
Fairly large, bright, very bright core and small bright nucleus.  4:1 E-W, and the halo is slightly longer and mis-shaped on the W -- this is NGC 1023A, a faint dwarf companion.  Also saw IC 239, a face-on spiral, as a small round hazy glow nearly directly west at the edge of the field.

NGC 1055: 02 41 45.2 +00 26 31 V = 10.6; Size 7.6'x2.7'
Very pretty long bright edge on pointed at by a small triangle of stars and near a group of three bright ones... slightly inclined with the near side tilted upward, and a prominent, jagged dark lane.  3:1 E-W.  

NGC 1087: 02 46 25.1 -00 29 55 V = 10.9;  Size 3.7'x2.2'
Fairly large, moderately bright irregular oval cloud orientated N-S, noticeably mottled and misshaped. 

NGC 1160: 03 01 13.2 +44 57 18 V = 12.8;  Size 1.9'x0.9'
NGC 1161: 03 01 14.2 +44 53 50 V = 11.0;  Size 2.8'x2.0'
NGC 1160 is faint, small, 3:2 NE-SW and north of NGC 1161, which is a much brighter elliptical with a small bright nucleus and round core, thick extended tips.  Two bright stars are just off its western edge.

NGC 1245: 03 14 41 +47 14 18 V = 8.4;  Size 10'
Fairly large loose cluster of around 80 equal faint stars, well separated from the surrounding sky, with a few brighter stars forming a pentagon to frame the cluster. 

NGC 520 = Arp 157 01 24 34.4 +03 47 42 V = 11.4;  Size 4.5'x1.8'
Large bright elongated galaxy, NW-SE, with a dark lane (or perhaps an overlapping / interacting galaxy) cutting through the southern side, slicing off a small section.  There is very faint halo coming off the western edges and spreading most prominently south and more faintly north.

NGC 522: 01h 24m 45.9s  +09°59'42" 13.9b 2.7 x 0.4'
Faint, moderately large, bright nucleus, rounded core in the middle with long elongated tips, 6:1 NE-SW.  Did not see the smaller galaxies labelled in the image.

NGC 584: 01 31 20.7 -06 52 06 V = 10.5;  Size 4.2'x2.3'
Bright nucleus, 3:1 halo ENE-WSW, pretty bright.  Small non-stellar round galaxy nearby to the SE (NGC 586), and another smaller, fainter non-stellar glow about twice as distant as the first but to the NW, which Aladin identifies as LEDA 1028168, B 15.23, an Active Galaxy Nucleus Candidate. Best with the 685 filter. 

NGC 772 = Arp 78 01 59 19.8 +19 00 30 V = 10.3;  Size 7.2'x4.3'
I called this a "bright compact elliptical" but it is a distorted spiral with a strong brighter arm to the north, coming from a bright core region.  I did notice the "smaller, fainter non-stellar glow" to the SSW of it, NGC 769.  Steve notes "This is a companion to NGC 772 and may be the cause of its bright, disturbed spiral arm."

NGC 779 01 59 42.3 -05 57 51 V = 11.2;  Size 4.0'x1.2'
Bright round nucleus, highly inclined halo, 5:1 NNW-SSE. 

NGC 891 02 22 33.4 +42 21 03 V = 9.9;  Size 13.5'x2.5'
Very large and ghostly, fainter than I expected, it appears to float behind a screen of stars with its very prominent jagged dark lake running the entire length.  Super long, NNE-SSE.

NGC 936: 02 27 37.5 -01 09 19 V = 10.1;  Size 4.7'x4.1'
Bright nucleus slightly inclined NNE-SSW, with a faint oval halo NNW-SSE around it.  Odd. 


NGC 1275 03 19 48.1 +41 30 43 V = 11.9;  Size 2.2'x1.7'
Brightest and largest of a large group of small ellipticals in the Perseus Galaxy Cluster, AGC 426.  The more I looked the more I saw within the field; I counted 16.  This one is the Perseus A radio source due to the strong x-rays being emitted from its supermassive black hole.
Hubble image:

UGC 11994: 22h 20m 52.8s  +33°17'42" 14.9p 2.2 x 0.3' 
Very faint, first seen with gain turned up high.  Small, 6:1 NW-SE, faint star on SE tip, hint of a dark lane across the length, and a bulged, brighter core.  With 685 long pass filter and unfiltered.

UGC 12430: 23h 13m 43.2s  +29°00'32" 14.8p 2.2 x 0.2'
Very faint but seen immediately with medium gain, faint, small, 8:1 NNW-SSE with a brighter core and very faint tapering tips.  Slight offset from a row of three stars in a broken line.  Did not see UGC 12427 to the SW.