June 19/20, 1977
103aO + GG13
An internal dust spiral arm winds from the
center of NGC 5739 to about 10" below the
center on this print. A broad, smooth, luminous
spiral arc of very low surface brightness, not
visible on this print, begins on the opposite side
of the galaxy (at the top of the print; the arm
unwinds outward on the right side, reaching to
about two-thirds the distance from the center to
the bright star on the right). The plate was taken
with a Racine wedge. The bright star at the right
has a secondary component made by the wedge
that is 18" distant to the upper left and 5 mag
The galaxy has one of the highest redshifts
in the Shapley Ames Catalog, at v_o = 5692 km/s.
The consequent absolute magnitude of M_B_ =
-22.5 is one of the brightest in the RSA. The
classification S0/SB0 in the RC2 is not supported
by the plate material here.
S0? (de Vaucouleurs)
Main body 1.5 x 1.4
Heidelberg Veroff. Vol. 9, 1926 dimensions rejected, nucleus only.