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Back to Observing Reports Date: August 11,
2012 Telescope:
22” f/4.0 reflector on a Blandin equatorial platform
Quick
note
about the KTG
Catalogue.
It is Part I of isolated triplets of galaxies
researched by a group of Russian astronomers in a
paper published in Astrofizicheskie Issledovaniia,
vol. 11 in 1979. This list contains 84 isolated
triples of northern-hemisphere galaxies with apparent
magnitudes of the components m < 15.7 mag. There is a
similar list for the southern hemisphere, KTS Abstract of
the original paper A
list of 84 northern isolated galaxy triplets with
component apparent magnitudes no fainter than 15.7 is
compiled on the basis of a complete examination of
Palomar Sky Survey prints. Equatorial coordinates,
photographic apparent magnitudes, angular diameters,
angular separations, morphological types, radial
velocities, and other characteristics of the triplet
members are provided, along with finding charts. Three
main types of triplet configuration are distinguished:
double, line, and triangle. It is shown that triple
systems constitute 0.8% of northern galaxies brighter
than 15.7 mag, that 64% of the triplets are
'completely isolated', and that 24% of the triplet
members are elliptical and lenticular galaxies, while
76% are spirals and irregulars. All object parameters in parenthesis are
listed in RA, Dec, size and listed magnitude without
commas.
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22”
(230,
383 and 690x) – A very faint trio of galaxies arranged
in a steep isosceles triangle occupying a space of less
than 1.0’ in diameter.
The two charted galaxies form the narrow base,
while the uncharted galaxy is at the tip. All three
members were detected with nearly 100% averted vision at
690x. CGCG 300-88 17 51
01.4 +62
49 19 0.3x0.1’ 15.6
– Very faint small round glow with no significant
central brightening and defined edges. About 0.1’
across. This
galaxy sits 0.3’ east of MAC 1751+6249. MAC 1751+6249 17 51
03.9 +62
49 16 0.3x0.2’ 16.0
(NED mag 16.62) –
Very faint small 3:2 elongated glow with no
significant central brightening and defined edges. A little
longer than CGCG 300-88, perhaps about 0.15’ across and
0.1’ wide. Uncharted 17 51
02.4 +62
49 56 0.2x0.2’ ? (NED mag
16.90) –
Very faint very small round glow with more diffuse edges
than its two neighbors.
Less than 0.1’ across. It lies 0.8’
north of CGCG 300-88 and the MAC galaxy. |
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22”
(230
and 383x) – Very nice pair of three distinctly different
galaxies arranged in a slightly crooked 45 degree right
triangle. Each
member ranges from 2.2’ to 2.8’ apart. NGC 6608 18 12
33.6 +61
19 54 0.7x0.7’ 15.3
– Considerably bright round glow with well defined
edges. Much
brighter large nucleus.
About 0.3’ across.
It is flanked by a 14.5 mag star 0.5’ south, a
mag 15.2 star 0.6’ NNE and a mag 11.0 star 1.5’ due
east. NGC 6607 18 12
14.9 +61
19 59 0.7x0.6’ 15.6
– Considerably faint round glow. Even surface
brightness with diffuse edges. Much lower
surface brightness than NGC 6608. 0.3’ across
and 2.4’ due west of NGC 6608. NGC 6609 18 12
29.6 +61
17 58 1.0x0.1’ 16.0
– Very faint thin even surface brightness glow. 0.4’ long and
PA = 45 degrees. 2.2’
SSW from NGC 6608 |
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22”
(230
and 383x) – Trio of one bright galaxy with two faint
neighbors arranged in a flat triangle. One of the
members is uncharted in Megastar. UGC 11659 21 00
04.8 +09
34 58 0.8x0.6’ 14.8p
(NED mag 14.76) –
Bright round glow with a very bright stellar core. Diffuse edges. 0.5’ across. CGCG 400-17 21 00
13.5 +09
33 33 0.5x0.3’ 16.6b
(NED mag 15.0)–
Faint, slightly elongated even surface brightness glow. 0.2’ long and
PA = 30 degrees. Uncharted 21 00 15.9 +09 33
58 0.3x0.2’ ? (NED
mag 16.32)
– Very faint very small slightly elongated glow. Even surface
brightness. 0.1’
long. |
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22”
(230
and 383x) – loose string of three faint galaxies in a
star rich region. CGCG 344-4 23 40
37.8 +78
15 12 0.6x0.5’ 15.5
– Considerably
faint small slightly elongated glow with diffuse edges. About 0.3’
long and 0.2’ wide.
PA = 45. CGCG 344-5 23 41
12.9 +78
15 05 0.1x0.1’ 15.6 –
Considerably faint very small round glow with defined
edges. About
the same surface brightness as CGCG 344-4. About 0.1’
across. Lies
1.9’ due east of CGCG 344-4 CGCG 344-6 23 42
07.7 +78
10 50 0.3x0.2’ 15.6
– Faint, small round glow with diffuse edges. 0.2’
across. Lies
6.4’ SE from CGCG 344-4 |
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22”
(230
and 383x) – Three galaxies arranged in a flat triangle
with a pair of mag 11-12 stars below the short base. UGC 3536A 07 03
22.3 +86
33 28 0.9’ 14.6p
– Considerably bright slightly elongated glow with
diffuse edges. Even
surface brightness with a very slightly brighter center. 0.2’ long.
UGC 3528A 07 02
20.7 +86
34 46 0.8x0.6’ 15.5p
– Considerably bright round glow with diffuse edges. 0.2’ across. It sits 1.6’
NW from UGC 3536A.
A faint 16th mag star lies between the
two galaxies. MCG+14-4-14 07 08
14.9 +86
39 29 0.8x0.3’ 15.3
– Considerably faint 3:1 elongated glow with defined
edges. Even
surface brightness.
PA = 90 and 0.5’ long. |
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22”
(230
and 383x) – trio of galaxies arranged in a loose
30-60-right triangle.
A trio of 11th magnitude stars
(10.8-11.4) is in the immediate field. UGC 937 01 23
37.3 +32
37 48 0.9x0.8’ 15.0p –
Considerably bright round glow with a slightly brighter
round nucleus. Diffuse
edges. 0.4’
across. MCG+5-4-47 01 23
51.9 +32
39 33 0.8x0.6’ 15.6
– Considerably faint 2:1 elongated even surface
brightness glow somewhat defined edges. PA = 150 and
0.3’ long. Lies
3.6 WNW from UGC 937.
MCG+5-4-50 01 24
12.1 +32
35 38 0.6x0.4’ 15.8
– Considerably faint even surface brightness round glow
with somewhat defined edges. No central
brightening detected.
0.2’ across |
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