Again, I detect a strange, wide zigzag string, 8 arc minutes
to the north-west of Ruprecht 74 (see sketch).
6 alpha Columbae, which could be seen as the eye of the starry dove, is situated just 38 arc minutes
to the west of the00000000000000 open cluster NGC 2061.
A lovely, complex area permeated with clusters and nebulosity is situated just 30 arc minutes
to the south of the globular.
Its dimensions are a generous 30 by 6 arc minutes
, and if the sky is fairly dark a small telescope will show it as a fuzzy spindle with hints of complex structure.
Only 16 arc minutes
to the south, and in the shadow of next-door neighbour alpha Grus, we find the elliptical galaxy NGC 7213.
The small group, Pismis 8, is situated only 28 arc minutes
east of NGC 2645.
All are magnitude 9 or brighter, have diameters greater than 3 arc minutes
, and have been seen with 7X50 binoculars.
7-magnitude star 89 Leon is within just a few arc minutes
Using observations obtained from space by the Rosat X-ray observatory, Madejski's team resolved the source of periodic X-ray variability to be a point some 37 arc minutes
from the nucleus and not associated with the Seyfert galaxy at all.
The edge-on galaxy NGC 3620 is situated just 32 arc minutes
north of IC 2631 and 32 arc minutes
off the border with the Carina constellation.
The telescope has diffraction-limited image quality over a useful field of view of about 10 arc minutes
Only 25 arc minutes
towards the west, the elliptical galaxy NGC 6861 occupies the middle spot of this galaxy group, being the second brightest member.
As Rao summarizes, it was a diffuse, grayish band about 7 arc minutes
5 arc minutes
, about 1/6 the apparent diameter of the full Moon -- incredible considering a society that depended on the unaided eye and did not possess inscribed metal tools.
These events are listed in the table on the next page, which gives the cluster's magnitude, its diameter in arc minutes
, and the approximate duration in minutes for the Moon's edge to cover the entire object.