My setup has seven cables up on the OTA and five on the mount:

• CCD Camera — Power, control, and guider
• Rotator — Power and control
• Focuser and OTA — Power and control
• Mount — Power, two control cables, guider, and hand paddle

The first three on this list ride on top of the mount and move; the final one is fixed but must connect to the computer like the others. The camera cables need enough room to rotate 180° in each direction. Each manufacturer has their own power plug size and power block, none provide a long power cable.

This has always been a mess.

I approached the problem with three ideas:

1. Run the cables off of the counterweight end of the mount (From Mike Rice of New Mexico Skies, shared at the 2011 Advanced Imaging Conference)
2. Enclose the cables in wire loom (From fellow LRE Astronomer Jerry K)
3. Pass only AC power and a USB Cable to the mount (My own thought but confirmed from others at AIC)

Ideas one and two are confirmed. Idea three is disproven. I tried putting everything on the mount. This included a power strip, four power blocks, and a USB hub. There was no good place to mount everything that was both neat and balanced. Back to the drawing board.

I built a shelf that sits below the top of the pier. This carries hubs, power bricks, and a USB-Serial adapter relatively close to the mount. Starting from the camera, I started a careful tube of wires (idea #2) that travel down to the counterweight end of the mount. The cables run down the counterweight side of the mount so that they only move back and forth at the point they come off of the mount (idea #1).

This is shown in the following photograph (click on the picture for a full-size image, and apologies for the blurry image).

Wire loom controlling cables from the camera to the mount

I have mounted the CCD Camera power supply on the counterweight shaft itself. SBIG really needs to provide longer cables on the DC end of their power supplies. At this point the power cables and control cables split and go to separate attachment points on the mount. This keeps the weight of the cables constant. This part of the set up is shown here.

Cables go from the Scope to the Pier

There is no binding and no stress on the scope or the camera from movement of the mount. Nothing snags or tangles. Altogether a satisfactory solution.

Here is a wide shot of the full set-up.

OTA and Mount

I’ve had two major hardware issues, with electronic parts being found defective after they successfully passed testing at the factory. With the help of Jerry K, I’ve been able to connect my ST-10 to the new scope. I’ve created what I hope is a better wiring set-up on the mount. And I’ve learned some things about software.

The defective parts were quickly replaced by the vendors. They also helped with the ST-10 connectivity. The software I figured out on my own. There are two software lessons.

Lesson 1. Removing ASCOM Components
ASCOM maintains its own registry of components. Some software does not remove the ASCOM registry entry during an uninstall. You can find orphan components by running ASCOM Diagnostics, part of ASCOM Platform 6.0. These orphaned components caused me problems with new components from the same company. To remove the orphaned components, use the ASCOM Profile Explorer. Find the component in the list and delete it. Simple, once you know what to do. Only a couple of hours and a mountain of frustration there.

Lesson 2. Locking the View to the sky in The SkyX Pro.
One of my biggest complaints in using the SkyX is that when I was centered on an object, it would move out of the field of view, as if I was looking through a alt-azimuth telescope. The only way I could stop it was to stop the clock. Not a good idea if you are attached to a telescope. I’ve finally learned why and how to get my preferred view to work. The clue is that the default orientation is terrestrial sphere which mimics how the sky would look from Earth. In fact, the stars do move by at the sidereal rate. What I want is what the SkyX calls the celestial sphere orientation. This keeps the stars in place on the screen. To select this view use Orientation > Celestial Sphere or alt-2. Now I am not grumpy with the SkyX.

As a final note, I’ve had a lot of support from PlaneWave and some alpha automated focusing software. I’ve also had no trouble with the latest release of FocusMax (3.6.0.71), downloaded from the files section of the FocusMax Yahoo! group.

Happy New Year!

First up, Hubble Award winner Ron Wodaski, author of The New CCD Astronomy, and truly one of the fathers of amateur astrophotography. Ron says we are all Astro-Quixote, in a constant search for more aperture, exposure, and data.

He’s building Tzec Maun observatory and putting a one meter scope in it. Lots of great details on the scope and camera, all going in a 50′ dome that was an old Air Force satellite reconnaissance station. Tzec Maun Foundation provides free access to high quality telescopes to students. Control system communications are HTTP and JASON, they have built a networked ASCOM compliant structure for controlling the scope and other systems. They are looking for research proposals and will offer paid access as well.

Next, Steve Cannistra on wide field image processing. Excellent definition: wide field is complete, has multiple related objects, and its impact depends on the whole frame. Wide field images area not high resolution and therefor less affected by seeing. He is using a Monet image as an example of how low resolution image can be quite beautiful image. Jay GaBany used impressionist paintings as examples yesterday. An impressionist theme is emerging at the conference.

Another theme: don’t bin RGB data. Cannistra feels that you lose good detail. Steve Leshin, Don Goldman, and Jay GaBany also said they do not bin their color. I think this reflects the ability to take more time imaging. Contrary to others, Jay does not feel that you need to get the chip that cold. He feels that -15C to -20C is enough. Jay GaBany and others said as cold as possible.

On resampling, don’t use bicubic. This reinforces last years lesson to use nearest neighbor for resampling. He suggests using GradientXTerminator on each channel separately to best eliminate gradients, using different aggressiveness and scale settings for each. Don’t use a fully processed Ha image to combine with RGB, because non-linear stretch will not match. Adding Ha to blue channel reduces good spatial information in the blue channel. So add OIII to blue and green. A key idea is to add narrowband as part of an RGB, not artificial palate, image. Noise reduction can eliminate faint detail, which is a loss to the image.

Astrophotography is a way to share what can be seen and a moment in time. It is a remembrance and celebration of a moment, just like other photography. Not science but art. Apologies if I haven’t captured Steve’s sentiments fully.

Nick Risinger is up, on a major mosaic project — a full night sky image. Captured with a unique six camera setup over an entire year, this is an absolutely stunning project. Used Maxim DL to reduce and IRAF to combine differing length exposures into one high dynamic range image. Images were standardized against full sky data from Pioneer. Just an amazingly brilliant approach. Open source for matching the mosaic and then PixInsight to create the final color image. Click the link above to check it out.

After lunch and we have Alex Filippenko to talk about some real scientific astronomy. All about black holes. Finding visual counterpart of gamma ray bursts is a good area for pro-am collaboration.

After that interesting presentation we have Peter Kalajian on Flat fielding. Flats fix dust and vignetting by dividing the raw light by a normalized value from the flat, with darks taken out in both cases. It is important to dark subtract your flats as that will change the normalized flat value (normalized is the flat value per pixel divided by the average value of the entire flat).

For good flats, evenly illuminate, just below non linear level of CCD, longer than 2 seconds to eliminate shutter effect, and use good darks. Go for million photon flats totaling across all frames.

Sky flats are for professionals, using the sky over a long period of time. We should say twilight flats for what amateurs typically use. Twilight flats have challenges, can be good, but are not repeatable. Light boxes need careful construction but give good flats. Electroluminescent panels can be good. Make sure to pick a full spectrum panel. Looking at the flat can help you diagnose the imaging train. Focus does not effect flats. Rotator position is not important IF your camera is directly on the axis. (Not for my set up!).

Now for the spotlight presentations. First up is Dr. David Maertinez-Delgado talking about stellar streams. Theory predicts streams around galaxies, but they are very faint. Astronomers are looking for evidence of the streams in both the Milky Way and other galaxies with the help of amateurs.

Dean Salman on creating a Sharpless catalog. An ambitious project. And some very nice images.

Joel Hagan, speaking about Mars surface imaging. He puts together images from the Mars missions. Makes the images perceptually easy to understand. Also some very cool work in creating 3D images.

And it’s a wrap for the day!

This is a faint galaxy in Andromeda. It is a total of 2 hours, 10 minutes of data. I was very happy with how the color turned out. So I went back and used the techniques from the video (along with my additions) to reprocess some data from last year. Here are the results. First, NGC 2146, a disrupted galaxy in Camelopardalis, with a version much better than the original.

The second better processing was the fourth version of NGC 6946. I think I’ve finally got the best result from the large amount of data (over 6 hours) I took on this object.

I plan on posting a full story of the processing later, once I complete the work on two objects I images last weekend.

We’ve had visits to two of our observatories and had some excellent solar observing. This last Saturday night we did a little imaging. With some clouds we more exercised the equipment than imaging. But it was a good time.

After the visit, I did get some good data on NGC 7640, a spiral galaxy in Andromeda. Here is a quick processing of the 80 minutes of luminance I gathered that night.

NGC 7640, Spiral Galaxy in Andromeda

We got up early, heading out of the city at 7:30am, going north on Interstate 405 to California route 14. On the 14 just north of Mojave, we stopped at Red Rock Canyon State Park. It is a nice desert badlands park. There is nice hike in the wonderfully named Nightmare Gulch, but we just stopped for a snack. With the wet Winter and Spring, the plant were in bloom and covered in interesting bugs. Click on the picture for a larger version.

Red Rock Canyon

The Sierra was beautiful and snow-covered. North of Lone Pine and just south of Independence, we stopped at Manzanar. There is now a Park Service-run facility there with very good exhibits and a good short film describing the internment of the Nisei during WWII. The facility was built in 2002. Here is the iconic memorial at the cemetery.

Manzanar Memorial

We stopped for lunch in Independence, California, population 250. The post office has a fresh coat of paint.

Independence Post Office

Not knowing were to stop for lunch, we stopped for gas first. Right across the street from the gas station was a small restaurant advertising itself as a “Biere et Vin Bistro.” We had to try it. It is the Still Life Cafe, run by a French couple. The food was wonderful. I had sausages, my wife had a brie sandwich. An amazing find in this pretty small town.

Still Life Cafe

Of course we had to stop at Mono Lake. Believe it or not, Tioga Pass which goes to Yosemite from the east, was still closed due to snow, and this was in mid-June.

Mono Lake

Our first night stay was in Minden, Nevada. We continued north on 395 to Susanville where we turned off to visit Lava Beds National Monument.

We went through two lava tubes at the park. Here we are at the entrance to the second one, known as Skull Cave.

Skull Cave Entrance

There is permanent water ice at the bottom of the cave. We all made it down, even my wife who had a badly sprained ankle.

Water Ice in Skull Cave

After spending the night in Klamath Falls, Oregon, we drove north and then cut over to the west through Eugene to the coast at Florence. Just north of Florence, we visited Sea Lion Caves which has nice views of the coast and some nice views of sea lions.

Looking South on the Oregon Coast

Looking Down at the Sea Lions

We spent our third night in Tillamook, Oregon and had a nice visit at the Tillamook Cheese Factory the next morning.

By this time, we could smell the barn. We drove with purpose the final day to Anacortes. (Well, we did stop for a walk but that will wait for a post update.)

Several days after arriving in Anacortes, my wife’s sister and her family joined us. My daughter, my nephew, and I walked around Cranberry Lake in Anacortes and visited an abandoned mine there. I have no clue what they were trying to mine.

Cranberry Lake Mine

I did all of my alignment and combination processing in PixInsight, and had a good learning experience there. The main one is to make sure to use the optimize function on the darks. All in all, even with the data challenges, the image turned out OK.

Here is the final result:

I did use Bob Franke’s eXcalibrator software to get the core color balance. It was very helpful.

Here is version 2. More stretched in the luminance, but the color I don’t particularly like.

Finally, version 1. I think you’ll agree the color and details here just don’t work very well.

First seen on November 22, 2006, the giant piece of mining equipment showed up again today.

Jerry Bonnell and Robert Nemiroff did do a great job featuring AIC imagers during AIC. That was much appreciated.

But I do wonder what the joke is with the big earth mover.