2019 Solar System Bests

2019 was one of the more challenging years as all the major planets are quite low altitude for norther hemisphere observers.  The reason that altitude plays a roll is because of the amount of air you must look or image through is greatly increased as you move closer to the horizon.

Regardless I was able to get most of the major planets!



Full resolution
https://i.imgur.com/274fRuV.png

Full resolution with labels
https://i.imgur.com/9gWe609.png


Come see all my previous editions from the past 11 years here - https://maphilli14.webs.com/annual-solar-system-bests

A pair of highlights are in the top left and center which include; Transit of Mercury across the Sun and a Super Blood Wolf Lunar Eclipse!

Mercury transit was shot from Disney, hand held DSLR and hand held solar filter on the 200mm lens!

 

Additionally, I was gifted Reddit Gold for my Venus post! - https://www.reddit.com/r/astrophotography/comments/ees6mj/venus_in_false_color/



I was able to get both the icy gas giants but not great quality.  I was able to target a comet, 38P/Stephan Oterma on 2019.01.26, simply by happenstance and it made a stellar occultation as well!   

For those extra curious sorts, here's additional details on why altitude matters so much.
https://en.wikipedia.org/wiki/Air_mass_(astronomy)











In essence,overhead you have a single airmass and as you move towards the horizon it gets increasingly thick amounts of air.

There's a good chart on this page here that also gets into the math (http://www.ftexploring.com/solar-energy/air-mass-and-insolation2.htm).  Essentially at around 30° alt you are looking through 2 air masses and down on the horizon the approximation is made that it's up to a total of 38 air masses.  This coincidentally is why the sun and moon rise/sets are so big and rich due to scattering and increased amounts of atmosphere!

Thanks for reading and look forward to my other post about a full Jovian season which will also highlight these effects!

- Mike

2019 Venus

Sadly this might be my shot of the 'year'. My views of a low alt Venus in False Color, comprised of R=IR742, G=50/50 R/B, B=UV. For my 2019 Collection!

DIY IoT power and cooling considerations

I'm the proud DIY'er who made a solution to monitor the whole night sky in an automated fashion by following Thomas Jacquin's Instructables DIY (https://www.instructables.com/id/Wireless-All-Sky-Camera/) project. Not only did he publish the h/w steps but he's got a killer github repo too (https://github.com/thomasjacquin)!

Here's the whole article on my process and methods - http://astromaphilli14.blogspot.com/2019/03/my-diy-astropi-allsky-system.html

Heat on the roofline, where I mounted it, and lack of cooling within the allskyPi forced me to get a creative solution to run properly at night and shutdown when the core cpu temp gets too high.

Shutting a Linux machine like a RaspberryPi is trivial but I'm as thorough as I can be and since my Pi is PoE powered, I wanted an extra layer of assurance.

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiVXzLhSSdElOk0oAjBcAqOIv72Zix18KgegkzcGhASFsGZbdRQvsL20SreR_sZPXuVHy98tEApnq8XlJnrEBhZv_AaZrXQqltGwWLjArEZesmTq2Nf99GLJf9zwVihXVguG5mFjCgtQ9I/s320/20190310_153648.jpg

I also power my PoE adapter via a Cisco IOS Switch, which has a cool feature called 'Energywise'  this allowed that admin to set a schedule of when to power off at a set time of day. 

Shutting the Pi and then 5 minutes later powering off the PoE works fairly well if your clocks are synced.  Syncing clocks is again trivial but because I shut the device based upon the heat the sun provides, guess what problem comes next?  Yes, season variations are at play as my sunset time in winter at 5pm versus 9pm in summer means that I'm potentially missing out on some nighttime observation.

So instead of statically setting the energywise time as in the following example:

!

interface GigabitEthernet1/0/5

 description Gi1/0/5 - PubVC - AllskyPi

 switchport access vlan 491

 switchport mode access

 energywise level 10 recurrence importance 90 at 4 20 * * 1-7

 energywise level 0 recurrence importance 90 at 51 10 * * 1-7

 spanning-tree portfast

!

Which power's up the Pi at 8:04PM localtime and powers off at 10:51AM, I can, using a script that runs on the Pi execute the following logic:

1. Decide normal operation temperature high water mark in a file
2. Read the temp from file, which allows manipulation without script restart
3. Clear previous night's start/shut timers with ssh / pexpect
4. Loop monitor the temperature X < Y
5. I had to insert a condition when the 'endOfNight' script runs that ups the high water mark before the script starts with a simple echo > and then back to the normal temp at end of script.
6. If the temp exceeds the limit:
1. Read new sunset times for boot up time and set on switch
2. Set shutdown timer +5min from current time on switch
3. Log messages
4. Shutdown the Pi
5. Wait until sunset, power up, rinse and repeat.

Here's some logs of the device booting up:

Aug 12 14:19:09: %ILPOWER-7-DETECT: Interface Gi1/0/5: Power Device detected: IEEE PD

Aug 12 14:19:10: %ILPOWER-5-POWER_GRANTED: Interface Gi1/0/5: Power granted

Aug 12 14:19:23: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to up

Aug 12 14:19:24: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to up

Finally the script is on my Github page -  https://github.com/maphilli14/allskysuppliments

Average Jupiter from father's day!

I was out the night before as well, for the 1st time in over 2 months!  Most nights the clouds are doing this - https://i.imgur.com/O6c7LPQ.mp4   but it was nice to have mostly clear skies even though it was just average conditions.

My DIY AstroPi AllSky system

I suffer and greatly from clouds! 

In my pursuit to automate the entire deep sky routine, so I can stay warm indoors I sacrifice some visibility into the overall sky conditions for clouds, haze etc that might be a detriment to the stability of my routine, especially when I plan to leave it imaging while I'm asleep.  😴

I knew that wide-angle, dedicated camera would work.  Looking at commercially available allsky I found them crazy pricey.   Then I thought, hey, I built my own telescope, i can DIY this. That's when i found Thomas Jacquin's Instructables DIY (https://www.instructables.com/id/Wireless-All-Sky-Camera/) project. Not only did he publish the h/w steps but he's got a killer github repo too (https://github.com/thomasjacquin)!

 It's a full enclosed and fully automated system and I've been loving it!! 🤖💞

Anyway there's tons of variation on the the Instructables site and I'm very happy to have found so many great ideas!

I set it up on the deck without the electronics to find it was a bit leaky so the photos show how much sealant I used RESEALING and retesting without electronics again!

First night out it rained but stayed dry inside!

Some of my details are in this video overview.

Right angle usb, it's tight inside a 4" PVC

POE injector for versatility in placement and remote power control! 

Shot of the Pi and some nails/screws in mounting wood for cord routing. 

Tube next to Pi. 

Cat5 routes under the PVC cap via drilled hole that is filled with a glued down hard rubber cap with an x slit to help keep water out. 

Underside 

Temporarily bungied to the deck rails 

Then the animation fun started...

Imgur video - https://i.imgur.com/uvvxzwl.mp4

YouTube

I've even begun a weather page that updates a recent gif of the cloud animations

https://f002.backblazeb2.com/file/allsky/LiveRefresh.html

I have a couple loose ends to tie up and might post an update in the coming months.