Mobile Astronomy

I continue to be amused at the capabilities emerging for mobile astronomy. While there are several mobile applications available to astronomers with smartphones and tablets, the combination I have at the moment is Deep-Sky Planner on Windows 7 plus either Sky Commander (digital setting circles) or SkySafari Plus (planetarium software) on an Android phone.

I have found that I can use the extensive planning features in Deep-Sky Planner to create observing lists that I can load into Sky Commander or my phone for use with SkySafari. I am working with a push-to telescope (no GoTo).

The Sky Commander option works well for finding asteroids and other objects that aren't in the Sky Commander database. This is actually my favorite option as I have worked in push-to mode for many years with the Sky Commander and printed charts. The greatest drawback with this method is that Sky Commander identifies custom objects with only a sequential ID number. I have to keep track of ID # 1 = asteroid Toutatis, for example. Users of Argo Navis get the text name which is most helpful. Deep-Sky Planner can format custom files for upload into Argo Navis; I just don't have one.

In my use, the SkySafari option is more or less a digital notepad that also shows the sky context in which the object may be found. It works quite well even though I am operating with a few limitations:

• I am using the intermediate version of SkySafari - not the pro version. The database is not as complete as I sometimes need. Should this become too great a limitation, I can upgrade to Pro.
• I am using SkySafari on a smartphone. The screen is small, although it is larger than many models (it's a Motorola phone with a 4.3" screen). I don't find that the size of the planetarium view on my phone is sufficient for every target. This may not be a problem at all for others.
• I do not use telescope control, so I rely on the coordinates given by SkySafari to use with my Sky Commander digital setting circles. I use the same technique when running Deep-Sky Planner on a laptop at the telescope.

Even with these limitations, I am able to take observing lists anywhere, anytime. It doesn't fit my needs for every observing session, but it's so darned handy! I can also log into the Deep-Sky Planner Plan Library and browse hundreds of plans with the browser on my phone. This is a terrific help when the plan prepared for the evening goes awry and a new one would serve better.

If you want to learn more about using a full-featured observing/imaging planner with SkySafari, please see this knowledgebase article on the Knightware website. It walks you through a complete example of using Deep-Sky Planner with SkySafari on an Android phone.

Search menu on SkySafari (Android) shows Custom Observing Lists

Custom list 'RASC Finest NGC Objects' uploaded from Deep-Sky Planner displayed in SkySafari (Android)

A Red Screen Cover for Smartphones

I am relatively new to smartphones but I have already found 2 good astronomy apps that I like to use while observing: SkySafari (sky charts) and Astro Panel (weather). While SkySafari has a night (red) mode, the display seems a bit bright. Astro Panel doesn't offer a night mode. Further, if you need to use the phone for calls, email or such, the screen is really bright.

Enter the Staunton River Star Party and vendor AstroGizmos. I spoke with Jeff of AstroGizmos about my problem and he quickly produced a red acrylic film large enough for my Android phone at the price of $10. While the price seemed high, the phone was a night vision destroyer, so the deal was made.

I carefully trimmed the film to fit my phone with an Exacto knife. The film came in a plastic sleeve but there was some dust on it anyway. Following instructions that came with the film, I washed and dried it to remove dust and oils. This worked well and I applied my new screen protector over the clear one already on my phone. It adhered nicely with no bubbles.

Next came the closet test - off to a pitch black closet with phone and the new red screen protector applied. I found that SkySafari + red film was good, but SkySafari in night mode + red film was best. Astro Panel + red film was a bit bright but ok for a quick weather check. Other phone functions were legible and much more night vision friendly.

Care and feeding...

Removing the film is not difficult at all since it lies on top of a clear screen protector. If the fit is difficult, you can use a toothpick to lift a corner of the film. Washing with soap and water seems to work well for removing gunk. I store mine with a clear film I got with my clear screen protector because the fit and material are made exactly for that purpose.

The acrylic is thicker than the clear screen protector that I use on the phone. I expect that the red acrylic will be durable enough to last quite a while.

The executive summary...

This purchase was a no-brainer. The phone is useable in the field for all its functions without destroying your dark adaptation. It is easy to maintain and install. AstroGizmos sells several sizes - my phone required the $10 size; you may need the $5 size. You can check out these red screen protectors at: http://www.astrogizmos.com/TransVinyl1.htm

Two Great Gift Suggestions for Astronomers

Great gift #1: Deep-Sky Wonders by Sue French

I recently picked up a copy of Sue French's new book, Deep-Sky Wonders, and it has more than exceeded my expectations for an observing guide.

The book is a beautiful hardback production with high quality paper. All of that is justified as the pages are full of Sue's experienced narrative, sky charts that illustrate the positions of the objects, and color photos by some of the world's most renowned astro-imagers. The variety of objects is rich and the artistry is enticing.

There is more to this suggestion than just the book though. Plan files are being completed now for use with Deep-Sky Planner that go along with the book. These plans contain essential information for hundreds of objects mentioned in the book, along with page reference numbers from the book. Together, the book and the plans equip Deep-Sky Planner users to work through observing and logging many of the finest observing targets in the night sky.

This project would not have been possible without the help of Sue French and Deep-Sky Planner user John Sillasen. Thank you both for your gracious help.

Great Gift # 2: SkySafari 3

I recently got a copy of SkySafari 3 for Mac OS X to test importing of plans produced by Deep-Sky Planner. DSP's plan files can be converted to the observing list format needed by SkySafari.

Testing went well on the Macbook running Mac OS X, but what really got my attention was playing with SkySafari on a smartphone. The import feature isn't ready yet for smartphones, but the application itself is amazing! I don't feel that the small device platform will completely supplant use of planetarium apps on a desktop or laptop, but it is a useful aid for observers on the go.

Southern Stars says they will have SkySafari out for Android ASAP, perhaps by the end of December. You couldn't go wrong giving this app to an astronomer that uses a smartphone or tablet.