Friday, July 14, 2017

The Spotted Sun

Lately, I have been experimenting with equipment in preparation for the up-coming total solar eclipse next month.  Most of my experiments have resulted in failures.

But one consistent performer has been my Thousand's Oak 77mm Solar Filter fitted to my Canon EF-L 100-400 mm lens.

Although I can't remember the last time I had clouds above my head, for some reason it didn't occur to me to attempt to photograph the large sunspot which has been travelling across the Sol's surface.

So, not long ago I put the filter on the lens and the lens on the camera and fired off a number of shots...after locating the sun in the viewfinder.  I had to zoom back to about 150 or 200 mm to locate the sun, then zoom in to the maximum 400 mm to make the image.

My Canon EOS 60D has a crop factor of 1.6 which gives a field of view similar to that of a 640 mm lens.

Below is the image I shot of Sunspot 2665.  The image was made at 2:24 pm, July 14, 2017.  Below it is a close-up crop of the sunspot itself.  According to a NASA website, Sunspot 2666 is located about eight sunspot diameters above and three diameters to the left of the complex shown in the lower right. I cannot see the new complex in my image, but it is made up of two rather small spots.

That's it for now.  Clear skies and good viewing!

Monday, June 12, 2017

Better Late Than Never

I got in a couple of hours of good seeing last night.  I had no real targets in mind, but I always look towards Jupiter to begin my observing.

Once I got the scope aligned, slewed to Jupiter and with the ETX-125 (f.l. 1900) using the 32mm, I centered the Big Brut.  I watched the moons for a while and then looked for the Great Red Spot.  I couldn't see it with the 32mm, so switched to the 26mm.

I looked hard with averted vision and yet still couldn't make it out.  Switching to the 17mm with a green filter and thought I saw something on the left side of the planet. Unfortunately, Jupiter moved behind the tree as I was spying on it.  My southern view is very limited.

I then slide the 26mm back in and slewed to M13.  At about 75x, I wasn't able to resolve any stars, but the cluster actually appeared brighter than it did with the 32mm.  I swapped the two out and it was true.  Slipping the 17mm (110x) I still couldn't resolve any individual stars within the main globe, but the cluster was dimmer. 

I then moved to M102 and although I couldn't make out much of anything, I could make out a slight haze with the 27mm.  I then slewed to M101 and again, absolutely nothing but a dark area.  I keep trying to visually see this galaxy, but it really is tough for my small scopes.

Then a thought hit me…could I get both M81 and M82 in the same view?  Using the 27mm, I just barely had both galaxies on either side of the field of view.  I switched to the 32mm and at 65x, they were both comfortably in my view.

Finally, I wanted to see how the ETX-125 handled nebula, so I selected the Ring Nebula (M57), hit the GOTO button and when it was finished slewing, saw the nebula slightly above center.  I centered it and with the 32mm. the 26mm, the 17mm, and 13mm eyepieces, I could easily see the ring, but I couldn't make out any color.  What I did see was seeing shades of gray.  My friend, G.A., says that is all he ever sees…shades of gray.

This post was originally written on May 28.  However, due to brain fart, I never published it.  However, in the time line of things as they happen for this blog, this is the next in line.  Certain things have happened which prevented me from observing, including clouds, irrigation, wind and personal activities.  With things improving (including current cloud cover moving out), I will once again add to this blog and hopefully, not forget to publish.

Until then, clear skies and steady seeing!

Saturday, May 20, 2017

Astrophotography and Jupiter

On Friday night (May 19, 2017) the ETX-125 and I had a late date with some sky objects.

I was able to quickly align the scope and when I punched in Jupiter, I found the planet sitting a little below center.  I was using the 32mm Plossl which gives me about 60 power.  After trying to define the various bands (I could make out the two major bands) on the planet, I decided I would try again to photograph the monster planet.

My previous attempt and only my second time trying astrophotography, was a total failure.  This time I was able to produce an image which didn't look like a blurry blob on my monitor.  That image is below:

I think it is a rather good image considering this was my third time imaging.  If you are wondering why there aren't any of the Galilean moons visible, the reason is simple.  The planet requires one exposure, the moons require a different exposure.  In order to to have both in an image, I would need to expose the planet, then expose the moons, then superimpose the planet on the moon image.  There might be a way to obtain an image of both at the same time, but I haven't figured it out yet.

By the way, if you are wondering what I used to make the image above, it was MalliCam's SkyRaider AG1.2c camera.  I shot a 30-second video and when processing the file, I ran it through Registax 6 to obtain the final image.  Most of process was automatic, but I was able to tweak the settings before I saved the image.

One thing I liked about the tracking of the Meade was I went inside after acquiring Jupiter to prep the camera.  I was inside for five or ten minutes and when I came back out, a look through the eyepiece showed Jupiter still in view.  It was barely moved from center.

After I finished with Jupiter, I input M13 into the control pad and the telescope found its way there and when I peered through the eyepiece, I noticed a nice grayish ball slightly above center and looking about half as much bigger than Jupiter did at 60 power.  I thought I could make out individual stars on the periphery of the dim ball, but I just wasn't sure.

My next target has been something I have tried to see for years...M101.  I punched M101 in the Autostar hand controller and hit GOTO and the telescope moved for a moment or two, then stopped. I looked in the eyepiece and nothing. Well, nothing isn't quite right.  There was stars visible, but in the central area there was nothing.  It may have been M101, but all I saw was blackness.

My next target was M82.  After a short period of movement the scope beeped telling me it is pointed to where M82 should be and when I looked, I could see a nice sliver of light pointed diagonally to the lower right of the view and the upper left of the view.  I admired the view for a few minutes and decided I would attempt to image M82 also.

And then my power tank died.  I had forgotten to make sure it had a good charge.  Wishing I could kick myself, I came in the house to get batteries for the battery pack of the ETX and realized I didn't have the correct size of batteries.

The moral of this post...always check your power supplies!

Monday, May 8, 2017

Jupiter and the Moon

As the moon rose on the evening May 7, it followed another bright object in the sky...Jupiter. Separated by a little more than three degrees, the pair look mighty fine travelling together.

I brought out the Canon 60D and the Canon 100-400 mm EF-L lens and as the sky faded towards dark, I was able to get this image of the couple.  Jupiter is seen in the upper right area in the full image.

Other than converting the image from Canon RAW to JPG, I also smoothed out the color of the sky. There were a lot of color artifacts which detracted from the actual color of the sky.

After sending the image to a friend of mine in Illinois, he sent back another image from which he was able to determine that the image also showed Jupiter's moon Callisto.  It is difficult to see, but in the full size image, Callisto is located at about 11 o'clock and about a two centimeters from Jupiter.

The camera was tripod mounted and the settings I used to shoot the image were ISO 1000, at f/8 for 1/640 of a second.  The lens was set at 300 mm.

Stormy Days

Along with watching the night skies when clouds aren't hiding everything, I enjoy watching a good thunderstorm.  However, there are normally few severe storms in central Oregon compared to other parts of the United States.

But I was pleasantly surprised when on the evening of May 4, I began seeing lightning flashes southwest of where I live.  I stepped outside to verify what I was seeing and saw flash...flash...flash. Realizing a storm was in progress and moving my way, I prepared my camera and headed to a good vantage point.

Once I found a good place, I began shooting.  I experimented with different settings until I settled on ISO800 with a shutter speed of five seconds and an aperture varying from f/5.6 to f/11.  I chose five second exposures because there was so much lightning that any exposure longer would have over saturated the images with too much light.  All the images were shot with a Canon EOS 60D and a Tolkina 12-28 mm wide angle zoom set at 18 mm.

Most of the lightning was of the cloud-to-cloud variety, with a few distant cloud-to-ground strikes. The storm also moved northward along the mountains 25 miles to my west.  Not all that far north of my town of Redmond, Oregon, the storm turned and headed northeast, giving Madras, Oregon, a night to remember.  But from my vantage point, all I saw was a spectacular light show.

This first set of images shows something I see even less often than thunderstorms in my area...Mammatus clouds.  Mammatus clouds are associated with severe storms and are the bumpy looking clouds which hang down from other clouds.  In the first image, the Mammatus clouds show up in the shadowed area along the upper third of the image.

In this second image, the Mammatus clouds are clearly seen highlighted by the lightning flash.

As I mentioned earlier, most of the lightning was cloud-to-cloud.  I very much enjoyed the way the lightning flashes highlighted the various clouds formations visible during the storm.  But it was the crawlers of cloud-to-cloud lightning which I really enjoyed.  Below are two of the better crawler images.

As nice as these images are (at least to me), they don't come close to my favorite lightning image I shot here years ago.  It was one of three lightning strikes during a short-lived storm, but it was a good one.  You can see the image here.

Saturday, April 22, 2017

It's Lyrid Time!

As I type this posting, my camera is working away outside, hopefully imaging magnificent shooting stars associated with the Lyrid Meteor Shower.

The predicted peak is early morning on April 22.  There is the possibility of seeing (in my case, imaging) 12-15 an hour.  I'll be happy with one...and extremely happy if the clouds hold off until after I bring my imaging gear inside.

When I first checked the sky at about 9:30 p.m., Friday evening, there was a thick cover of clouds over my area.  I assumed my imaging time would be non-existent.  However, another check of the sky around 11:30 p.m. provided my eyes with a sky full of stars and very good conditions.

But the conditions were nothing like the quality of the sky early in the morning on April 21.  From my backyard in town, I normally see three stars in Ursa Minor.  One of the stars, of course, is Polaris. The other two form the far end of the bowl of the dipper.  Friday morning I could see all the stars of the Little Dipper.  So I setup my camera.

At approximately 2:03 a.m., while I was inside enjoying the warmth, a meteor gracefully displayed its end which was fully captured on my camera.  You can't miss the meteor in the image below.

Oddly enough, the meteor shown above is the only meteor I was able to capture Friday morning.  My camera clicked its way through around 535 images.  In all, I captured the passage of two aircraft, seven satellite transits and one meteor.

The image was taken with a Canon EOS 60D with a Tolkina 12-28 mm Wide Angle zoom attached and set to approximately 14mm.  Shooting data was ISO 1600, 15-second exposure and an aperture of f/4.  The image was saved in JPG format.

Earlier that morning, I stepped outside to make sure everything was still working strong and as I turned towards my entry door, my eye was drawn to a sporadic meteor entering the atmosphere just south of Jupiter.  I followed that meteors trail as it moved northward until it disappeared about 15 degrees above the northern horizon.  The meteor was slow and a very pleasing yellowish gold in color.  It didn't leave a train, but at times, small bits seemed to fall off and instantly burn up.

It was only the second Earth-grazing meteor I have seen.  It traveled across a good three quarters of the sky before disappearing and was visible for a good five seconds.

I initially thought the meteor might have been captured on the upper part of one of my images, but that wasn't to be.  However, I do like the one meteor I did capture.

Hopefully my camera is working well and the Lyrid shower is providing me a good show.  I'll know in a couple of hours.

Monday, April 17, 2017

An Open Cluster Stack

Those who know about my enjoyment of astronomy, also know I enjoy meteor photography.  I set my camera gear up for all showers, including minor ones, to get that perfect meteor.  I have yet to capture that “Great Nighttime Meteor,” but I keep shooting and trying for that one shot.

A while back, I purchased a Tolkina wide-angle zoom mainly to use for meteor photography.  However, I also use it for wide area shooting of the night sky. 

Recently, I used it (combined with my Canon EOS 60D) to shoot a dozen images of Melotte 111, or Collinder 256.  To many, the naked eye open cluster is called the Coma Berenices Cluster.  The cluster is located below the bend in handle of the Big Dipper and about three times the distance the top of the bowl covers…if that makes sense.

Saturday evening proved to be one of the few clear nights I have experienced here lately, so I took the recently acquired Celestron SkyMaster 15x70 binoculars outside and pointed towards the cluster.  From what I have read, the cluster covers about 7.5 degrees in the sky.  Unfortunately, the SkyMaster binoculars have a field of view of 4.5 degrees.  Wanting to see the entire cluster in one swell swoop, I decided it was time to break out the Canon.

At the time I decided to photograph the cluster, it had moved to directly overhead and getting my tripod to point straight up takes a lot of leg adjusting and balance checking to get things working together.  The problem is my tripod is designed mostly for video work and not well suited for working straight up.  Once I found the balance point, I took a couple of test shots, saw that the cluster was most likely in the view and after setting the lens to 14mm, shot a dozen 10-second exposures.

Since I have yet to have good luck stacking images, I wanted to practice with these photos using DeepSkyStacker.  I have other stacking programs, but they are the ones I have used in the past with non-impressive results.  For the most part, it is the alignment of the images which have been the problem in the past.

After transferring the images to my computer, I started DSS on the working computer and opened the User’s Manual for DSS on the laptop for reference.  I really didn’t need to read much to figure out how to use DSS.  It is rather straight forward if the person doesn’t plan to do a lot of manipulation of the images prior to and during the stacking process.  I just wanted to see a good stack with stars aligned well.

And that is what I got.  The image below is the results.  My only concern is in the stacking process, a lot of the stars visible in the original images are not in the final product.  I should probably read the manual.

The cluster is located in the lower left area of the image about a quarter of the way from the left edge.  It is a small grouping of stars in the image, but through the binoculars, it is spectacular, even if I cannot see the entire cluster.

One other note of interest to no one in particular…today I began receiving items I ordered which I plan to use during the “Great American Eclipse” on Aug. 21.  Soon as the days clear here in the Pacific Northwest, I will accustom myself to their usage.

My next trip to the stars will most likely be early morning on April 22.  You guessed it…the Lyrid Meteor Shower.  Although the shower officially began April 16, and will end on April 25, the peak of the shower is predicted to be around 3 a.m. April 22.  My camera is ready to go if the weather cooperates.