Oct 232014
 

The PTO made its first road trip today to get a view of the partial solar eclipse visible from the panhandle. The tree line here at the observatory would not allow a view so I had to pack up everything and head to my favorite western horizon; the military drop zone just south of I-10.

fc2_save_2014-10-23-170546-0191_crp

I had not used the new Point Grey camera with the Lunt H-Alpha scope before so some time was spent this morning in the driveway figuring out the correct configuration for the telescope / camera combination. A new voltage converter also made its debut to ensure the laptop wouldn’t stop mid eclipse and to power the camera. With so much equipment making its rookie start a dry run was in order. I wanted to make sure all the cables would reach where they needed to and that I brought along everything I would need. It was time well spent as all the bits and pieces were on hand, the cords and cables got where they needed to go and I was up and running and focused a good half hour before the estimated time of first contact. I also brought along a filtered Orion 4.5″ Starblast telescope so I could view the event in white-light and in case the spectacle drew any passers-by.

My plan was to start taking images 5 minutes before the eclipse started and get an image every 10 seconds from then until the celestial pair dropped below the distant tree line.

At least, that was the plan.

First deviation: timing. Luckily, my impatience took hold and I started the camera about 7 minutes early. First contact is just visible in image 4. Yep, between 30-40 seconds after I pushed the button.

And as always, Mother Nature marches to her own drummer and well before the tree line came into view, the Sun-Moon pairing dropped behind some distant clouds and the event was over.

The above image was taken just before the clouds made their entrance. This H-Alpha view does not give active region 2192 its due. The white-light view shows the largest sunspot complex that I have ever seen. The sunspot is large enough to view naked-eye with an old pair of eclipse glasses. Along with active region 2192 there are also two impressive filaments visible. Ultimately, I got 241 images before the clouds became objectionable. I will massage those into an animation and post it when finished. All the equipment played well together and there were no injuries. All-in-all a successful event.

Finally, I would like to thank one of our county’s finest. Just after the clouds started to intrude into the eclipse a patrol car passed by, saw the hood open on the van (remember the voltage converter), turned around and came back to make sure I didn’t need any help. Of course, I didn’t, but could have. Thank you Officer.

 Posted by at 22:25
Aug 252014
 

I’ve finally gotten a chance to put a camera on the Lunt 60mm H-alpha scope. Future plans are for a small dome dedicated to solar observing and this telescope is the first optical component toward that goal. I put the PTO’s DMK21AS planetary camera on the scope just as a test and the image below is the result.

h_sun 14-08-20 09-39-55

I set the scope up on my portable mount in the yard with a very long USB cable carrying the imagery into the observatory. Currently, I don’t have a remote focuser for the telescope nor did I have the mount connected to a computer so I spent the morning running back and forth between the telescope and the control room monitor displaying the camera output. I was finally able to get the scope pointed at an interesting portion of the solar disk and a somewhat focused image. I captured several 2500 frame series before the clouds rolled in and then ran a couple of them through RegiStax 6.

sun 14-08-20 09-39-55 closeup
The series of undulating prominences on the upper right edge of the Sun is reminiscent of a very large Loch Ness monster. Nessie appears to be heading around the edge of the Sun to prevent any further observations. No wonder we can’t find her in Scotland.

 Posted by at 17:01
Nov 062011
 

After an extended lull, solar activity appears to be finally picking up.  Active region 11339 rotated into view on the 3rd of November.  I first viewed it late Friday afternoon waiting for  the sky to get dark at the ‘WEBELOS Weekend’ event at Spanish Trails Scout Reservation.  I set up my 6″ Newtonian in support of the NWFAA and took my solar  filter specifically to view this grouping.

”]AR 11339 is the group below and just left of center.  As you can see, the area is large enough to be easily visible even during coarse focusing.  In fact, this sun spot group is large enough to see without any magnification.  I used my hand held solar filter and can just see the group even with the sun low on the western horizon.

According to NASA this area has produced 11 class-C or stronger flares in the past 3 days.  Several reports show the longest dimension of the grouping to be about 50,000 miles long.  With the diameter of the earth right at 7,900 miles, you can see just how big the area is.

This image is a stack of twenty three 0.0008 sec exposures.  These white light exposures were test shots taken to verify focus and exposure time but by the time I got back outside, clouds had moved in and trees had become a problem.  So these were the ones that I was stuck with. It also means I didn’t get a chance to take any flat frames which is why you can see several smudges from dust donuts.

 Posted by at 18:00