Sky and Telescope - November 2018 - 56
NOVEMBER 2018 OBSERVING
Deep-Sky Wonders
p Left: The subtle spiral galaxy NGC 7177 lies east-northeast of 13 Pegasi. Look for an elongated haze with a brighter core at the east-northeastern
end of an arc of three 12th- to 13th-magnitude stars. Right: Little more than an oval patch of light in the eyepiece, the faint fuzzy NGC 7743 looks its
best in deep-sky images. Finely formed spiral arms wind tightly around the barred galaxy's bright central core.
56
N OV E M B E R 2 018 * SK Y & TELESCOPE
In the 10-inch reflecting telescope
at 213×, NGC 7743 shows itself as a
fat oval, about 1.7′ long, exposing a
core pinned by a brilliant, minuscule
nucleus. NGC 7742 wears a faint
fringe that stretches its diameter to
1′, and a starlike nucleus dwells in its
heart. Turning the 15-inch reflector
toward these galaxies, NGC 7743 grows
to about 2′ × 1½′ and NGC 7742 to
roughly 1¼′. NGC 7742 boasts markedly higher surface brightness than its
neighbor.
A recent redshift-independent
measurement places NGC 7743 at a
distance of 66 million light-years. The
latest such value for NGC 7742, 72 million light-years, is from R. Brent Tully's
1988 Nearby Galaxies Catalog.
On a star-filled night while Pegasus
is yet arisen, be sure to sample some of
his mixed bag of deep-sky treats.
¢ Contributing Editor SUE FRENCH
chases the Winged Horse and other celestial wonders from upstate New York.
Peak Pegasus
Object
Messier 15
Pease 1
NGC 7094
Type
Globular cluster
Planetary nebula
Planetary nebula
Mag(v)
6.2
~14.1
13.4
Size/Sep
RA
Dec.
18′
21h
30.0m
+12° 10′
2.5″
21h
30.0m
+12° 10′
94″
21h
36.9m
+12° 47′
28.9m
+11° 05′
Σ2799
Double star
7.4, 7.4
1.9″
21h
1 Pegasi
Double star
4.2, 9.3
36″
21h 22.1m
+19° 48′
NGC 7177
Spiral galaxy
11.2
3.1′ × 2.0′
22h 00.7m
+17° 44′
11.5
3.0′ × 2.6′
23h
44.4m
+09° 56′
1.7′
23h
44.3m
+10° 46′
NGC 7743
NGC 7742
Spiral galaxy
Spiral galaxy
11.6
Angular sizes and separations are from recent catalogs. Visually, an object's size is often smaller than
the cataloged value and varies according to the aperture and magnification of the viewing instrument.
Right ascension and declination are for equinox 2000.0.
NGC 7177: DOUG WHEEL A ND; NGC 7743: POSS-II /
STSCI / CA LTECH / PA LO M A R OBSERVATORY
ing the 1960 Palomar Supernova Search
at a photographic magnitude of 16.0.
In 1976 Justus R. Dunlap (Northwestern University, Corralitos Observatory)
reported the second feebly shining at
visual magnitude 16.5.
Slightly dimmer than NGC 7177, the
photogenic galaxy NGC 7743 lies 28′
south-southeast of the red-giant star 77
Pegasi. Images show two spiral arms,
each of which tightly wraps itself threefourths of the way around the galaxy
from its apparent wellspring at the core.
Through the 130-mm refractor at
48×, NGC 7743 is easily visible in a
fall of faint stars tumbling southwest
from a widely spaced, bright pair. North
of NGC 7743, NGC 7742 shares the
field of view, the duo forming a squat
isosceles triangle with 77 Pegasi. NGC
7742 is also easy to see, but smaller
than its companion. At 102× NGC 7743
becomes a 1½′-long, east-west oval with
a bright center and a very faint star
crowding its south-southeastern edge.
Less than 1′ across, NGC 7742 is round
with a relatively large, bright interior
and a faint star near its east-southeastern edge. This mist-filled crystal ball's
nickname, the Fried Egg Galaxy, stems
from the golden color of its core in a
famous Hubble Heritage Team image.
Sky and Telescope - November 2018
Table of Contents for the Digital Edition of Sky and Telescope - November 2018
Contents
Sky and Telescope - November 2018 - Cover1
Sky and Telescope - November 2018 - Cover2
Sky and Telescope - November 2018 - 1
Sky and Telescope - November 2018 - Contents
Sky and Telescope - November 2018 - 3
Sky and Telescope - November 2018 - 4
Sky and Telescope - November 2018 - 5
Sky and Telescope - November 2018 - 6
Sky and Telescope - November 2018 - 7
Sky and Telescope - November 2018 - 8
Sky and Telescope - November 2018 - 9
Sky and Telescope - November 2018 - 10
Sky and Telescope - November 2018 - 11
Sky and Telescope - November 2018 - 12
Sky and Telescope - November 2018 - 13
Sky and Telescope - November 2018 - 14
Sky and Telescope - November 2018 - 15
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Sky and Telescope - November 2018 - 17
Sky and Telescope - November 2018 - 18
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Sky and Telescope - November 2018 - Cover3
Sky and Telescope - November 2018 - Cover4
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