NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-10 T06:53:25 PST
Help | Comment | NED Home

Notes for object NGC 6942

4 note(s) found in NED.


1. 1997ApJS..110..299M
Re:NGC 6942
Bar is visible in both the ellipse fits and the K_S_image.

2. 1994CAG1..B...0000S
Re:NGC 6942
SBa(s)
(E,I,0)
CD-1047-Br
July 22/23, 1979
103aO + GG385
35 min
NGC 6942 is the latest of the smooth-armed spirals shown on this
panel. Incipient lumpiness, but at a very low level, exists in the
arms, which are smoother than those in NGC 1169 to the right but not
as smooth as those in NGC 936 and NGC 4314 above. The distinctness of
the arms is also intermediate between that of these same two
comparison galaxies. The arms here can be better traced than in NGC
0936 but not as well as in either NGC 1169 or NGC 7371 to the right.

3. 1994CAG1..B...0000S
Re:NGC 6942
SBa(s)
(E,I,0)
CD-1047-Br
July 22/23, 1979
103aO + GG385
35 min
The smooth, massive spiral arms throughout
the disk of NGC 6942 are definite, although they
are less distinct than in NGC 7743 on the
preceding panel. The pattern is that of a
two-armed spiral with arms starting from the end of
the bar, unwinding counterclockwise as one
moves outward.
Each arm can be well traced for about 1 1/4
revolutions, almost overlapping after each has
unwrapped by about half a turn. A total wrap of
450 deg, as here, is unusually large. However, the
arms in NGC 7096 (Sa; panels 68, 88, S3),
including their very faint outer parts, can also be
traced for about 1 1/2 revolutions.
Because of (1) the massiveness of the arms,
(2) the large wrap and the overlap of the arms,
and (3) the tightness of the wind, the disk
appears to be filled with the arms. This appearance
is similar to that seen in the early Sa galaxies
NGC 2655, NGC 2681, and NGC 6340 on panel
62 in the Sa section.
The disk filled with arms causes spiral
galaxies in these earliest sections of the Sa and
SBa morphological boxes often to be misclassified
as S0 or SB0 on low-resolution plates; the arm
structure is usually smeared away. The classification
of NGC 6942 as SBO in the RC2, based on
a Mount Stromlo 30-inch plate, is inappropriate.
The galaxy is a prototypical SBa, albeit very
early in the SBa morphological box.

4. 1985SGC...C...0000C
Re:NGC 6942
Plate 1577
Overexposed center, bright bar, incomplete (r): 0.7 x 0.6; arms form
faint (R'): 1.3 x 1.0. Very bright center, smooth arms. Rich background
of galaxies.
Plate 1591r
Overexposed center, pretty bright (r): 0.7 x 0.6, arms form nearly
complete (R): 1.4 x 1.0.


Back to NED Home