More scanned slides from the distant past… why not put them up and remember what things were like back in the days of Ghostbusters!
Archive for November, 2015
Of the 15 runs made, only 6 turned out. The rest had to be thrown out due to: usb noise on the way to the computer… slow it down a bit and things were better; pier shake.. looks like the floor has heaved a little and is now touching the telescope pier… must fix that this weekend.
Filename times have been changed from EST to UTC. Soon we will look at WinJupOs to see how it works and how it can help.
The animated GIF above is the result of only 5 images, as one of the others was a different size (pixel size) and would not merge with the rest.
Meade 20cm LX200 at f10, ZWO ASI120mc camera, 5ms exposures for 60 seconds. Processed with autostakkert and registax.
Seeing and transparency were poor-average, a large rain/cloud front had just moved through and cleared a few hours before. Humidity was high, around 71% but temps were not cold, at 0-1C
The Lennox and Addington Horticultural Society (aka the Napanee Garden Club) met last night (meetings are the 3rd Wednesday of the month), at the Napanee Firehall Community Room, 7pm.
It was a good turnout of 27 people for a workshop on wreath making. Frames were $5 with decorations provided by the members.
The Community Garden Summary was turned over but not presented.
Next month’s Meeting will be on Wednesday 2015 December 02 at 6pm at the same location. it will be the holiday pot luck dinner.. please bring your own potluck food, dishes and cutlery.
If you wish to donate some door prizes as well, that would be a bonus.
Best images to date!
Great morning. Outside at 04:30 EST, packed up before 05:30 EST
At the time it may not always seem like a good idea, but in reality, having another astronomer in the house to get oneself outside in the morning is a *very good idea*.
Kim did some visual observing of Jupiter, watched for Leonid meteors (not very many), and did some canon ELPH imaging of the waning planetary conjunction.
I did some more Jupiter imaging, this time a run of 9 (it was 10 but one was not very good), across 30 minutes… ie a new image every 3 minutes.
5ms exposures for 120 seconds, resulting in the 12000 frames + or – range.
then a 60 second wait and then another run.
This time I took the best 25% of the images for stacking and wavelet processing, then put the 9 images into an animated .GIF above.
Being so early in the morning, and the coffee was still perking… I forgot to turn on the debayer in the camera capture software (still not exactly sure how this affects the image).
The good news was, no condensation on the primary at all for the whole run!
Seeing was average-good as was transparency (average-good).
I judge seeing by how much the image bounces around my selected Region Of Interest (strictly qualitative) and transparency by the exposure needed to make the histogram hit 80%. The lower the better.
Just towards the end of the animation you can see the Great Red Spot appearing from the left hand side.
North is up, rotation is left to right.
This is an animated .GIF of the three processed images from this morning.
This morning saw poor seeing and poor-average transparency from about 05:20-05:45 EST whilst imaging the Giant Planet Jupiter.
I have a kendrick micro controller for the heaters but with only one control button to turn it on, program it etc.
Sometimes the command sequence does not work, or it is too early in the AM for the brain to function ..,
In any event there was no getting it to work this morning (recommendation for the old fashioned dial controllers!) and even with the dew shield, the corrector started fogging up within 4 imaging runs.
Not only that but the exposure required also change from 6ms yesterday to 10ms today.
This image was taken with FlipX and FlipY so that North is up and debayered (firecapture 2.4.12)
10 ms exposure over 60 seconds gaining 5489 frames. We then used the best 50% of the frames.
The moon to the lower left is Io. Nice little eyebrow over the GRS.
Taken at 05:31 EST Jupiter is getting higher up as well, aiding better imaging.
Jupiter was 38 deg in Altitude, mag -1.86 and 33.8 arcseconds large According to stellarium v0.14)
Processed with autostakkert with no drizzle and no sharpening.
Then processed with registax6 into .png
The three processed images making up the above animation are below:
Another good morning of imaging of Jupiter, after some upgrades to the observatory were performed yesterday.
The roof guide rails were 2″x4″ x8′ and were replaced by 2″x3″. This prevented the roof from freezing and sticky in the morning -3C.
The corrector plate heater (10w) was replaced by a retail product, thinner and 20w of heating ability… and the existing broken power cable for it was done away with.
A dew shield was built for the telescope, consisting of a “krazy karpet” style soft plastic.
The 20cm diameter gives about pi*d or 63cm of circumference and used up the entire karpet. The dew shield was notched to slip back even further past the telrad base and still extends out 30+ cm (x1.5d recommended.
All of these modifications helped to image from around 05:13 EST until it got too bright from the sunrise twilight without any fogging of the corrector plate.
This encourage us to ramp up the exposure from 120 to 180 seconds.
The image above is the last of the morning, 14373 frames at 6ms exposure. Processed by autostakkert for the best 25% into a .tif then registax6 wavelets only. Jupiter was magnitude -1.85 with a diameter of 33.7″
The settings on registax are a little on the high side still, making this look too processed, too contrast enhanced. But it is a good three steps forward and one back for todays session. Future ones will only get better.
Also, there was an attempt to use firecaptures autorun feature, of 5 runs of 120sec each, but most of those failed due to poor tracking… Jupiter left the field of view.
November 8, 2015
1:10pm-2:05 pm (18:10-19:05 UT)
What a great day to spend time outside. The sun is shinning , a crisp fall breeze from the North, and only a few small clouds
in the sky, and the temperature is 9C. I set up the SolarMax 60 and used a variety of eyepieces, 12 mm,18 mm, 25 mm and the 2X barlow.
I sketched the sun using a variety of papers (black construction paper-Crayola Mighty Marks, Black Canson 98lb paper and Canson 65lb Universal Sketch(white) and mixed media. The mixed media consisted of Prism Coloured Pencils, Derwent Watercolour pencils, and Prism pastels.
The goal was to see how each of the media’s worked on the papers, and which one I preferred. Each had its own pro’s and con’s, but it was a fun and great experiment.
Starting with the Black Crayola Might Marks, was called black, though it is more of an indigo colour compared to the Canson Black paper. It is also very light weight.
The coloured pencil does not show up that well. The pastels seemed to blur and smudge too easy. Both of the following images were sprayed with fixative.
As you can see the paper is ridged giving a pattern to the sun, and makes it hard to colour dark.
The ridged effect gives does not give a true surface feature to the sun, and it is hard to have a defined edge, though it blends well.
As you can see the pencil gets washed out and does not show any colour. I will not be using this type of media on Black Canson paper anymore. Great to find out though!
I have been drawing on this particular paper for over 4 years and to date it is the best that I like for coloured pencil. Today I used the Derwent WaterColour Pencils, and I must say I really like this medium. though you cannot seem to get a hard line for contrast it is a nice effect on the sun with the filaments.
The only thing that I will need to find now is paper that will take the water that is used for the Derwent Watercolour pencils, as the 65lb Canson tends to ripple.
What a great day!
Another nice morning… seeing average to good, transparency average to good.
The best image of Jupiter this morning as the corrector plate heater failed and it completely fogged over.
This was 6823 frames at 6ms each over the course of 120 seconds with a 20cm f10 Schmidt Cass style Meade LX200 with a ZWO ASI 120MC camera (usb2). It was processed with autostakkert! into a .TIF with no sharpening or drizzle for the best 50% of the images. It was then processed by Registax6 for wavelets only.
Tomorrow mornings weather is promising, especially now that we have a working heater on the corrector plate and a brand new dew shield to boot!
Flipped X, flipped y, debayered in Firecapture 2.4.12
To date we have had 4 of 5 linux fedora 23 updates completed, so far all without issue.
Of particular note was an update from a troublesome system running fedora 21. Over 20 attempts to upgrade this to fedora22 failed due to some mounting issue failure during the upgrade. After each failed attempt, I decided to stop and wait for fedora 23 to come along.
Eventually it did, I tried it and it failed.. 5 times. But at least the error messages were different this time.
Seemed to be a conflict with .f22 and .f23 packages. It would fail after “running transaction test” and reboot
I tracked down /var/lib/dnf and rm *fc22* -f and tried it again…
It went passed the transaction test to the Running transactions. 3839 steps later (and 50 minutes later), it restarted into fedora 23 without error!
What a relief. Powerup to login time is 53 seconds. Could be less with a SSD Boot drive… will think about that in the future.
One more upgrade to do here, a few at home and this will be done.
Another great morning to be out before sunrise and imaging Jupiter.
This time was between 05:15 and 05:40 EST with the last quarter moon getting close.
This was a 60 second run using the best 10% of 1464 frames at 41ms each with a Celestron x2 barlow and the ZWO ASI 120MC camera on a 20cm Meade LX200GPS.
Barlows may get you a larger sized image, but at the cost of a software focus, lower contrast and a longer exposure time (x4 time for a x2 barlow).
This was processed with autostakkert! into a .tif with no drizzle, then imported into Registax 6 and wavelet processed with my “jupiter” settings. I’ve just started to use registax for wavelet processing and the results are so good I may give up on the old process of autostakkert directly to .png format with a x1.5 drizzle enlargement.
It’s always a good day when a new Fedora Linux gets released. Today was Fedora 23. There was no real rush to upgrade… we were already on kernel version 4.2 and in all but one case, everything was working well and smoothly.
The one exception was a fedora 21 installation that absolutely would not upgrade to version 22. It would get midway through the process, and reboot back into 21. Very frustrating the last 6 months or so.
The goal now was to skip 22 and upgrade directly to 23. But first, an upgrade on a couple of noncritical systems first, just to test out the process and learn what to expect.
[root@Sxx]# fedup –network 23
fedup has been replaced by ‘dnf system-upgrade’. Use that instead.
Redirecting to ‘dnf system-upgrade download –releasever 23’:
Fedora 23 – i386 19% [===- ] 1.2 MB/s | 7.5 MB 00:26 ETA
Skipping packages with broken dependencies:
policycoreutils-python i686 2.4-14.fc23 fedora 399 k
python-pexpect noarch 3.1-4.fc23 fedora 123 k
Transaction Summary ====================================================================
Install 66 Packages
Upgrade 1350 Packages
Remove 2 Packages
Total download size: 739 M
approx 10 minutes to download.
Download complete! Use ‘dnf system-upgrade reboot’ to start the upgrade.
approx 1 hour to upgrade after reboot
rebooted without issue into: Linux version 4.2.3-300.fc23.i686+PAE
as a bonus using the –network update method, there were no updates to install afterward!
Successes: 1/1 so far.