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ASTRO: vdB 14



 
 
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Old July 29th 14, 10:40 PM posted to alt.binaries.pictures.astro
Rick Johnson[_2_]
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Default ASTRO: vdB 14

HD 21291 is a B9Ia super giant star that illuminates a nearby reflection
nebula to the southwest. The combination is vdB 14. For the position
van den Berg used the illuminating star's position. Usually that star
was in the nebula so that system worked but in this case the star is so
far from the nebula in angular distance I'd miss nearly all the nebula
if I put it in the field or even used the published coordinates for
vdB14 to center the image. While vdB14 is the common name for the
nebula vdB nebula have other catalog names that do center on the nebula
itself. So I figured I'd look that up and use that as my coordinates.
Turned out it did have one other listing, GN 03.25.0, but that is just a
catalog of catalogs so uses similar coordinates from the vdB catalog.
SIMBAD shows no other designation for the object, certainly none even
close to its actual position. I ended up manually centering it,
something I rarely do any more.

The glare from HD 21291 is seen in the upper right corner. It is also
known as CS Camelopardalis a pulsating variable star. Hipparcos puts it
about 4,300 light years away. The reflection nebula is obviously at
about this distance as well to be so strongly lit by the star. Because
of the reflections the star caused when nearer the field I had to off
center the nebula to keep the glare and reflections to a minimum. No
way could I escape the huge arc the star creates thanks to reflecting
between the optical window of the CCD and the SCT's flat corrector plate.

There are 5 galaxies from the 2MASS in the image. All very faint and
starlike without redshift or even magnitude data so I've not tried to
point them out. It's a someone pretty field but pretty barren
otherwise. I can't even find any study of vdB14 that's been published.
As there's no fine detail to this object I'm posting it at 1.5" per
pixel.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME

Rick
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