Hershel 400 Objects in Delphinus
|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 IV 16
|| Bright, pretty large, elongated 1.5 X 1, central
star easy at 100X. Moving up to 270X with a Barlow lens reveals that
the east and west sides are brighter than the rest of the nebula.
This planetary is pale green at all powers. I have heard NGC 6905
called the "Blue flash nebula" but I have never seen blue
in this object.
||H I 103
|| Bright, pretty large, much compressed, round
and has a brighter middle at 100X. It can be seen in the 11 X 80 finder
or 10 X 50 binoculars. This is the type of object that responds with
a much better view on a clear, transparent night. On a night I rated
6/10 for seeing and transparency, down on the floor on the desert
near the Organ Pipe Cactus National Forest, I could only resolve 3
stars with a mottled core at 160X. At the same power on a beautiful
night in the Red Rock country near Sedona at 5000 ft., this globular
blazed with 40 stars resolved, 6 of them in the core area. This is
the kind of observation to postpone until those rare 9/10 evenings
when stars twinkle very little and the Milky Way blazes overhead.
||H I 52
|| Pretty bright, pretty small, round, very bright
middle and very compressed at 100X. This very distant globular is
one of the most mottled objects I have ever seen in the 13" at
180X. This extremely grainy globular has only shown me stars on its'
face one time. Using my old 18" f/6 at 210X, I saw 3 stars superimposed
on the surface of NGC 7006. One was held steady, the other two appeared
and disappeared with the seeing. This was on a night I rated 8/10
for transparency and 7/10 for seeing.