Sun
in
Hydrogen
Alpha
/ CaK
With
Coronado 40 / Lunt 60mm CaK
Uploaded
9/4/11
| Here
is a comparison of Calcium K light to Hydrogen Alpha light taken
on Sunday morning. The clouds were persistent until about 10am,
and then the seeing went bad. I still got in these images, and
you can see the 40mm is out resolved even in bad seeing by the
60mm Lunt. This was true despite the fact that in red light the
seeing is always better than in UV or blue. CaK sits right at
the blue/violet range, thus they are powder blue here. Hydrogen
alpha is a very deep red, almost near IR, and is colored orange/red
in these images. |
With Lunt CaK Prime Focus
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Click on image for a larger view:
Full disk view of the sun showing
half a dozen large active regions.
At this wavelength, spots are still dark
as usual, but are surrounded by faculae
and bright points and small bright islands
You are looking at a level between the
photosphere and corona.
|
With Lunt CaK - 2x Coronado Barlow
With Coronado 40mm - 3x Klee Barlow
Here we are looking at AR1281 heading for the edge of the disk
Monster spot group AR1283 coming on to the center of the disk
AR1277 and friends turning off the disk. VERY active - Flared today.
AR1287 is just coming on and promises a good show
With Lunt CaK - 3x Coronado Barlow
 |
Left: AR1283 is a massive group,
this is my first attempt at using the 3x
Barlow in very poor seeing. Despite this
I think the resolution is decent.
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With Coronado 40mm - 3x Klee Barlow
 |
Not seen in the CaK image, this filament
is located on the upper left oncoming edge
and is only visible in Halpha. When viewed
on the edge of the sun, this would be a
large prominence.
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Instrument: Coronado 40mm Ha or Lunt 60mm CaK
Platform: Astrophysics 1200
Camera: DMK 1024
Location: Payson, Arizona
Elevation: 5150 ft.
Sky: Seeing 4/10, Transparency 6/10
Outside Temperature: 85F
Processing: Registax 6, Photoshop CS2
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