July 21/22, 1979
103aO + GG385
NGC 6721 is a normal E1 of medium compactness. It may form a
binary pair with IC 4806 (Sb) which is 14.4' distant. The redshifts
are v_o(6721) = 4316 km/s, from the RSA2, and v_o(4806) = 4249 km/s,
from Huchtmeier and Richter (1989). The mean redshift distance is 86
Mpc (H = 50), giving a projected linear separation of 360 kpc for the
Suspected tail extends 1' to north. Optical pair with IC 4806 at 15'
Overexposed center. Knots in lens. Extremely faint plume (?) to north.
Overexposed center, several stars superposed. Faint companion 5.5 north-
Small, bright nucleus.
There is a very small star attached 0.2 arcmin south-following.