Aug 12/13, 1980
103aO + GG385
The two principal arms in NGC 6984 begin
on the rim of an almost-complete internal ring
which, as usual, is itself the near-overlapping of
the tightly wound spirals near the center.
One of the two principal outer arms is thick
near its beginning, although it is detached at this
point from the inner near-ring much like one of
the principal arms in M51 (panel 177).
The redshift of NGC 6984 is one of the
larger in the RSA at v_o = 4435 km/s. Nevertheless,
the two largest HII regions in the thick arm
resolve at the 1" level, consistent with core plus
halo diameters of 450 kpc in luminous galaxies
(Sandage and Tammann 1974a).
Overexposed center. Small SA(r)0? 5.5 north-north-following.
Overexposed center. Thick knotty arms. Interacting(?) pair with NGC 6982
at 5.6 preceding. Interacting(?) pair with (R')Sa? at 5.7 north-following.
=ESO 235- G 20
Pair with NGC 6982 at 6 arcmin
(r): 0.35 arcmin x 0.25 arcmin. Asymmetric.
There is a bright star 1.3 arcmin following.
Pair with NGC 6982 at 6 arcmin.
Note revision of Mt. Stromlo (1956) classification