Feb 12/13, 1978
103aD + GG495
NGC 1546 insert
Jan 1/2, 1981
103aO + GG385
NGC 1546 has a very-high-surface-brightness
arm pattern, seen almost edge on. The surface
brightness is so high that on low-resolution
photographs the image would appear to be an S0
galaxy having no structure. In both the RC1 and
RC2 the classification is listed as S0?, based on
a 30-inch Stromlo reflector plate. But the
pattern is that of a nearly edge on Sc spiral with
multiple arms, similar to the morphology of
NGC 3511 and NGC 4781 on this page.
The redshift of NGC 1546 is v_o = 1007 km/s.
The image in the insert frame is made from
a different Las Campanas plate than was used for
the heavier main print. The thick-armed,
multiple-spiral-arm pattern that begins at the center
is hinted at in this print.
Overexposed center, dark lane, bright lens 2.2 x 1.6 with whorls;
faint corona (dist?).
=ESO 157- G 12
Strong dust lane across the edge of this highly inclined galaxy.
Very small, bright nucleus.
Asymmetric dark lane.
Mt. Stromlo 30-inch dimensions:
Nucleus: 0.9 arcmin x 0.3 arcmin
Lens: 1.6: arcmin x 0.6 arcmin