IC 5240: this case is quite similar to the previous one. Again
the HII regions are placed mainly in the external ring, but as
the galaxy is quite inclined, both methods are in reasonable
agreement. As before, we keep the values from the second method,
whose PA is in excellent agreement with all the literature values,
and the IA with the results of the Lauberts ESO catalog (1982).
Bar is visible in both the ellipse fits and the K_S_image.
IC 5240 (Fig. 10, top).--The bright inner ring is lined by discrete H II
regions. There are bright ones near each end of the bar. No H II regions are
seen inside the ring. There is a bright nuclear source and faint diffuse
emission along the bar to the east. Many discrete H II regions scatter in the
faint flocculent outer arms.
Sep 26/27, 1978
103aO + GG385
The pattern in IC 5240, where tightly wound separate spirals form
a double-gamma shape, is similar to the pattern in NGC 7702 in the Sa
section (panel 66). An earlier version of the form is in NGC 6684
(SBa; panel 97).
Overexposed bar, bright (r): 1.2 x 0.8, many very faint knots.
(r): 1.3 x 0.8.
Small, bright nucleus. Bar: 1.2 arcmin. (r): 1.2 arcmin x 0.8 arcmin
(with 2 stars on it)