Category Archives: Home Observatory

Home; private, backyard observatory. Deep-sky objects explored.

East Veil Nebula

I switched the observatory camera from the original CCD SBIG ST-10XME to my modified CMOS Canon 500D/T1i. Replacing the observatory camera was more work, of course, than envisioned. The Canon sensor is set back compared to the SBIG and there was not room for the TEC-140 telescope to get focused. Jeff Dickerman, the super helpful president at Optec, made me a new adapter to go with another receiver that shortened the camera train enough to get easily into focus. I then rediscovered (I had forgotten but found my own forum entry) that CCDAutoPIlot had to turn off the feature on TheSkyX that would record both RAW and FITS files and records only the FITS files. It turns out the DeepSkyStacker can work with FITS and convert the RAW files that create them in color. But I had over time come up with a dark library in RAW frames for the Canon so I could temperature match with the light frames. I don’t have such with FITS files. But if I want to use the observatory automation of CCDAutoPilot, which I do, I will need a new FITS library at a range of temperatures to do it right.

Then I had trouble with setting exposure with CCDAutoPilot on the Canon images. I’m telling a lot of technical info here, but it took a lot of wrestling directly with complex technology to get through all the unforeseen obstacles. The Canon CMOS sensor uses a 2X2 Bayer matrix to record color. Two cells of the matrix are green, the other two are red and blue each. CCD’s, like my SBIG camera,have individual sensors not organized in a matrix. In something to do with the CMOS Bayer matrix, CCDAutoPilot only sees one cell as exposed, and it was saturated, while the other three were only about one-fifth exposed. It averages them in a meaningless way and it seems hit or miss if CCDAutoPilot can get the exposure close enough to get flats. Sometimes it gives up, sometime it settles on something. Focusing is tough too, as is plate solving. CCDAutoPilot did not have a solution as you can see on their forum here, but John Smith there encouraged me to investigate on my own further. You are getting in pretty deep when the software designer basically says good luck.

Weirdly, after all that, I did come up with the image below.

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Trifid Nebula, Star Factory

The Trifid Nebula is one of the most popular objects to be viewed and photographed by amateurs like me, but if you are in mid North America you have to be quick, it isn’t up for long. In mid-August it doesn’t get fully dark where my observatory is in Torrey, Utah until 10 PM. At that time the nebula is due south, right at the meridian, and at its highest point in the sky for the night at a low 26 degrees altitude (90 degrees is straight up). Boulder Mountain is south of Torrey and it is as dark as it gets in that direction, so it is a good place and time to photograph the object. But by 1 AM the Trifid is getting below 20 degrees altitude, getting close to the mountain and running into too much atmospheric interference near the horizon. The trick is to get some moonless, cloudless nights at these few critical hours. Mid-August worked out this year.

Deep-sky object, Trifid Nebula
Trifid Nebula in Sagittarius, HαRGB, August 2020
Sky plot
Just above the “teapot,” the field radius of the attached image = 0.5 degrees

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Butterfly wings and change

It is obvious that one butterfly flapping its wings somewhere on the planet is not going to change the weather. Such a thing is the proverbial gnat fart in a hurricane. That is how I feel when it comes to boycotting the big tech companies like Facebook, Amazon and Google.  What is my tiny effort going to do against their immense wealth and power?

But their immense wealth and power is the problem. Amazon is choking out America’s bookstores, publishers and retailers. Yes, they make lower prices for consumers but thinkers like writer, attorney and professor at Columbia Law School Tim Wu and Rhode Island Congressman David Cicilline, Chairman of the Subcommittee on Antitrust, Commercial and Administrative Law, know that there is more to the dangers of monopoly power than price. This old investment professional is worried that there are only about half as many public small-cap companies as there were twenty years ago. I am worried that Google and Facebook are almost completely choking out journalism and the democratically critical Fourth Estate. Economy like ecology like democracy requires diversity to thrive and survive. We are starting to recognize that all this free and cheap internet service like Google, Facebook and Amazon offer is actually very expensive and diminishing. Continue reading

IC 4601 in Scorpius

I’m working on weaning myself as much as practical from social media. I have previously written how the largest corporations today, primarily all internet related, are dangerously sucking all the oxygen out of the economy. I don’t want to be a part of that travesty if I can help it.

I have been posting my astrophotos on Facebook where I get by far the most response. But I want to lay lower playing that game. I have ad blockers and add-ins that keep me from being tracked, but I want to spend less and less actual time there. I also use DuckDuckGo to search instead of Google, have dropped my Amazon Prime, and the only Apple product I use is an old iPad to stream Spotify. It’s a start.

As part of that start I want to post my astrophotos here instead of Facebook. I may not get as much attention. I hope to be grown up enough to be fine with that.

Here is one of my latest images. You can click on it to go to my astrophoto gallery on this same website to see a larger version and to find brief technical information about how it was acquired.

Backyard observatory deep space object photo

IC 4601 in Scorpius, June and July 2020

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The Zen of stuck

I recently sent this letter to my daughter, Kristen, of adventures and unexpected lessons from the observatory.

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Mounting the beast (Celestron C-14)

Hi Bug!

I had an experience this week that is sticking with me as a terrific little metaphor. I am the student. The thing has cast a spell. I am pondering how to take in the message.

Last Friday Kirsten [my wife] went to NYC to the annual Torrey House distributor conference and to see her dad and sister. While she was gone I scooted down to Torrey to see if I could install one of my dad’s telescopes in the observatory, one that I had not used before. It is his most powerful scope and it is a big beast. I didn’t know if I would even be able to lift it up to the mount, slightly over my head, into its dovetail fitting. I could have used help, but Torrey is far away and I have already imposed on a willing neighbor there too much. I put on some old work gloves. I hefted the thing up, got the dovetail started, but then it jammed. Before my muscles gave out I set the scope back down and waited a while. The gloves left incongruous dust prints on the pristine instrument. Throughout the day I tried 7 more times and went to bed that night thinking I should lift weights more. I thought about it and the next morning tried a new angle. On the second try I finally got it. I sat down to marvel at myself while I gave the mount the command to move to its home position. As it did so I laughed as I realized I had put the beast on upside down.

But that was not the full lesson. Continue reading

Veil Nebula (NGC 6960)

The Veil Nebula, sometimes called “The Witch’s Broom” is in the constellation Cygnus. Some 5,000 years ago, give or take, a star went supernova and this image is a piece of the remnant. The full circle of the remnant takes up about a three degree circle in the sky equaling a space about six times the diameter of the moon. With instruction manuals, trial and error and plenty of help from experts on amateur forums, I point the observatory telescope to a pre-identified place using sophisticated, automated equipment and capture the sub images. William Herschel, on the other hand, made his own telescope and found the object for the first time in 1784. No digital cameras were involved.

Veil Nebula

Veil Nebula (NGC 6960), June 29, 2017

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Hair in the air

I wonder if she had bangs. The constellation Coma Bernices is named in honor of Berenices II of Egypt, who was the queen of Ptolemy III (246 – 221 BC). The queen vowed to sacrifice her acclaimed amber tresses in the temple of Aphrodite at Zephyrium following the king’s safe return from battle. After her golden locks mysteriously disappeared from the temple, the court astronomer Conon apparently made peace by convincing the royal couple that the lost sacrifice had been transformed by the gods and made into an eternal constellation. Perhaps kings then, like president trumps today, required constant creative handling. Trump might think it handy to have a blowdryer galaxy all his own for his special headdress.

M100 & NGC 4312 Galaxies

M100 & NGC 4312, Torrey 5/27/2017

M100 and NGC 4312 are members of the Virgo Cluster of galaxies in constellation Coma Berenices, 50 million light years from earth. M100, also known as the Blowdryer Galaxy, is the upper galaxy seen face on, NGC 4312 is a spiral galaxy seen edge on. There are several other small dwarf galaxies also in the image. Continue reading

Torrey dark sky campaign

In Torrey, we are blessed with an industrious neighbor, Mary B., who is working on getting the Torrey Town public lights, including street lights, modified to improve lighting and reduce light pollution. Mary is also working to make Torrey the first International Dark-Sky Association community in Utah. She asked us for a letter of support and we penned the following: Continue reading

Bridges in the dark

Salt Lake City | Torrey, February 2017

Last August I received a call from my 83 year old mother. “Your father wants to speak with you,” she told me. It is like that with Dad and me, not a lot of direct communication.  I told Mom I would come over the next day after dinner. When the time came I was surprised to see my wife, Kirsten, grab her purse and head for the door with me. My father has a reputation for being difficult and there are rarely volunteers to join me in seeing him. Dad is in his mid-eighties and as his oldest offspring I am to be the executor of his will. I thought he might want to talk about some details or arrangements, but when we all sat down around the table together, including Kirsten and Mom, he asked me if I wanted his observatory. I thought he was asking if I coveted his belongings, which I surely do not. But in my own advancing years I may have gained adequate wisdom so that when Kirsten kicked me under the table I ceased my objections and turned to see her silently mouth, eyebrows raised, “This is an honor.”

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Dad at his Alpenglow Observatory in Salt Lake City, August 2016

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