Another Slice of Pi

Well, it's almost been a full year in service and I would have to say that we are extremely pleased with how our Raspberry Pi has performed as the primary computer controlling the ATEO telescope at SkyPi observatory in New Mexico. What do we like best? Let's see:

• Boots up quickly
• Easy to maintain (at least if you have some Linux experience!)
• Runs TheSkyX natively
• Low power usage
• Stable platform - we've been running for months at a time between restarts
• Cheap and inexpensive

New Raspberry Pi with battery and power controller board.

Of course, not everything is roses...what are some of the downsides?

• If power is lost unexpectedly it may not shut down cleanly, so there is the potential for corruption
• No internal clock needs to be set time from the internet when booting
• We are running a Linux OS so cannot use many windows only Astro apps

New Pi in its housing, along with the 64GB USB flash drives.

With some experience under our belt, we felt it was time to build some redundancy into our setup in the event that the primary Raspberry Pi goes down and in the process address some of the shortcomings outlined above. Here's what we plan to do:

• We have purchased a second Raspberry Pi which will be used as the primary computer to control the ATEO, and the current Pi in service will be kept online as a backup if the primary goes down.
• In addition, this new Pi will have some additional capabilities added to it:
• An internal battery will be used as a UPS to power the Pi in case power is lost
• An internal fan to cool the CPU
• Software that will cleanly power down the Pi if it is on battery power for an extended period of time
• (2) 64GB USB flash drives one serving as the main drive and the other as a mirror copy of the main drive (a 'pseudo' raid!) to be used as a backup if the main drive goes down due to corruption, hardware failure, etc.
• Software to allow the ability to run windows apps: we've been able to run Windows apps such as 'CCDInspector' on the Pi, giving us more flexibility

We hope with these improvements we will make ATEO even better!

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What's in the Sky - May 2018

Get outside with your telescope (or without a telescope) on clear May evenings to see celestial treats recommended by Orion Telescopes and Binoculars! With the weather warming up and skies clearing up, there's no shortage of celestial delicacies to view with telescopes and binoculars. Here are a few of Orion's top suggestions for May observing:

Radiant of the Eta Aquarid Meteor Shower peaking before dawn on May 6th.

Eta Aquarid Meteor Shower

Grab a blanket or a comfy lounge chair to sit back, relax and watch the Eta Aquarids meteor shower, one of two annual showers caused by dust particles from Halley's Comet. Catch the peak of the dazzling show before dawn on May 6. The waning gibbous Moon might outshine some of the fainter meteors, but there will still be opportunities to see meteors streak across the night sky at the approximate peak rate of about 30 per hour. Look for meteors appearing to radiate from the constellation Aquarius.

Bright Jupiter

Jupiter reaches opposition on May 9th, making it the best night of the year to explore the gas giant planet and its four brightest moons Io, Europa, Ganymede, and Callisto. Since Jupiter will be directly opposite the Sun from Earth, it will be visible all night long. Opposition occurs when a planet reaches its closest approach to Earth in its elliptical orbit. Take advantage of Jupiter's brightest night of the year and take a closer look at its cloud band "stripes" and four Galilean moons with any size telescope.

M97, the "Owl Nebula" in Ursa Major (left) and M57, the  "Ring Nebula" in Lyra (right).
Images by Insight Observatory.

Four Big Planetary Nebulae

Use a 6" or larger telescope and an Oxygen-III or UltraBlock filter to catch nice views of four relatively large planetary nebulae in May skies. See the "Ghost of Jupiter," NGC 3242 in Hydra; M97, "the Owl Nebula" in the Big Dipper; NGC 4361 in Corvus, and the famous "Ring Nebula", M57 in Lyra just a few degrees from the bright star Vega. To help you locate these objects, use The DeepMap 600.

New Moon, Dark Skies

Take advantage of the dark skies provided by the New Moon on May 15th to scope out the many star clusters, galaxies and other deep-sky gems on display. Pack up your astronomy gear using our full line of telescope and accessory cases and head to a dark sky site for the best viewing conditions.

M13, the "Great Globular Cluster in Hercules (left) and M3, Globular Cluster i n Canes Venatici (right).
Images by Insight Observatory.

Five Glittering Globular Clusters

Five picture-perfect examples of globular star clusters will be visible in May skies. Check out M3 in the constellation Boötes. M13, the "Great Cluster in Hercules" will be visible near the zenith. M5 can be found in Serpens and M92 in the northern section of Hercules. Be sure to track down M4 (NGC 6121) in Scorpius on May 27th, as it will be in a great position for telescopic study throughout the night, reaching zenith around midnight. Big telescopes will provide the best views, but even a pair of humble 50mm or larger binoculars will show you these dense balls of stars from a dark sky site.

Crescent Moon and Venus

After the sun sets on May 17th, you'll find a stunning view of the waxing crescent moon to the left of brilliant Venus. While you're observing the pair, use a telescope to look for the crater Furnerius at the lower right of the crescent moon's face. Try Orion's 1.25" Orion 25% Transmission Moon Filter, perfect for crescent phases, to improve lunar contrast and tone down glare.

M101, Face-On Spiral Galaxy in Ursa Major (left), and M51, Face-On Spiral Galaxy in Canes Venatici (right).
Images by Insight Observatory.

Four Face-On Spirals

Use a large telescope to see the classic pinwheel shapes of galaxies M51 and M101 in the Big Dipper asterism of Ursa Major, and M99 and M100 in the Virgo galaxy cluster. There are also dozens of additional galaxies to explore in the Virgo cluster with a large-aperture telescope.

All objects described above can easily be seen with the suggested equipment from a dark sky site, a viewing location some distance away from city lights where light pollution and when bright moonlight does not overpower the stars.

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Hidden Galaxies

Ever since our new flat field light table was installed on the south wall in Gamma at SkyPi Remote Observatories, the quality of the images coming back from ATEO-1 has greatly improved. Recently the crew at Insight Observatory were imaging random deep-sky objects to test their image processing with the new flats and as they were imaging a few of the most common deep-sky objects for testing, they uncovered a potential project for students that could be a lot of fun while creating colorful deep-sky images...

M97, the "Owl Nebula" imaged by Muir Evenden with a circled unidentified anomaly.

One of the objects randomly imaged was the planetary nebula known as M97, the "Owl Nebula" in the constellation Ursa Major, the Great Bear.  As Insight Observatory's Project Developer, Michael Petrasko, was post-processing the 300-second image originally acquired and processed by Systems Engineer, Muir Evenden, Michael noticed a smudge-like anomaly towards the lower right bottom of the image. The object had very similar characteristics to that of a comet. However, the object was yellowish in color, and comets, for the most part, show up on images as bluish-green in color.

As Michael zoomed into the image to get a closer look at the aberration, he saw many dim disk-like objects randomly scattered throughout. These objects were in fact galaxies.  However,  Michael could still not resolve what that blurry spot of light was in the frame even after being at full zoom. He then circled the object and forwarded it off to Muir for his consultation of what it may be.

Screenshots of the galaxy cluster identified from the Aladin Deep Sky Atlas Software.

Muir was also baffled by the oddity of light so he referenced the SIMBAD image database included in the Aladin Sky Atlas software. With this application, Muir could overlay one of his original luminance frames to determine if the object was in fact in the SIMBAD database of images for comparison. Identification of the blurry object was then confirmed by Muir using the software. The object was a small cluster of galaxies and when viewing an enhanced image of the object from the SIMBAD database, the single blurry object can be resolved as multiple galaxies.

As students acquire images of common deep-sky objects, it would be good practice to task them with zooming in and panning around their images to look for other anomalies such as this one and attempt to identify them with an application such as the Aladin Sky Atlas.

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