Hershel 400 Objects in Sculptor
|Abbreviations in the CON column are the IAU versions.
|The column TYPE has following abbreviations:
|OPNCL = open cluster
||PLNNB = planetary nebula
||GLOCL = globular cluster
||CL+NB = open cluster and nebulosity
||BRTNB = bright emission or reflection nebula
|Hubble Classification for galaxies or GALXY where no
|In the Herschel Column
the Classes are:
|I = Bright Nebulae
||III = Very Faint Nebulae
||V = Very Large
|VII = Pretty Much Compressed
Clusters of Large or Small Stars
|II = Faint Nebulae
||IV = Planetary Nebulae
||VI = Very Compressed and Rich Clusters
||VIII = Coarsely Scattered
Clusters of Stars
||H V 1
|| is the star of the show in Sculptor. This very
large and very bright galaxy was discovered by Caroline Herschel in
1783 during a comet search. From the Cape of Good Hope, her nephew
John Herschel called it " a superb object" in the 18"
reflector. This spiral is probably the closest galaxy to the Local
Group. This object is easily seen in a finder or pair of binoculars.
In the 8 incher at 100X this galaxy is over half of a 45' field and
displays some mottling. At 130X there are many stellar spots near
the core in moments of good seeing. In the larger instruments there
are many dark lanes, with swirls and rifts prominent throughout the
galaxy to a somewhat brighter core region.
||H VI 20
|| is a welcome globular cluster as a break in
all these galaxies. This globular is a large, low surface brightness
object. It can be seen in 10x50 binoculars as a small, dim spot. The
8" at 100X will resolve 30 stars across the face of this cluster.
The larger scopes help some, with more stars resolved. The cluster
does not have a brighter core in any of our scopes. A.J. Crayon called
it "irregularly round" in the 8". Steve Coe says "roundish"
in the 17.5". It sounds as if you will have to go look for yourself.
||H I 281
|| is pretty bright and quite elongated in the
8" at 80X. This scope will show the outer tips of the spiral
arms curved as if to show off their motion. Neither of the larger
scopes will bring out that detail. All three instruments will show
a brighter core and a pretty bright star on the NE side of the galaxy.