A few weeks ago after taking some photos of Jupiter, I changed my setup to do some long exposures on an easy target: a globular cluster. Unfortunately I forgot to note down the name of what I had photographed! So a few weeks later when I found the time to process the images I was at a loss to identify what Messier object it was. However, after an evening of matching up stars surrounding the cluster and I was able to correctly identify it as Messier 3.
Globular Cluster – Messier 3 (Benoit Guertin)
The above was taken with my Skywatcher 80ED and Canon 80D. It is a stack of 27 x 10sec exposures at ISO3200 on an unguided and roughly aligned mount.
Looking at my archives I found that I had imaged M3 about 10 years ago with the same telescope, so I decided to align both old and new image and see if anything would stand out. And to my surprise, spotted one star that appeared to have shifted. To help identify the star I colorized one of the photos and subtracted from the other (done in GIMP). All the stars within the field of view lined up except this one; the two colored spots are not aligned!
High PM Star BD+29 34256
To be sure this wasn’t on an error on my part I did a bit of research and found it to be a know high proper-motion star BD+29 34256.
It’s not everyday someone with amateur backyard astronomy gear can show how a star has moved in 10 years.
The last time Jupiter was in a favorable position for good photos was 2010, so while I have photographed the planet a few times since, the results weren’t really satisfactory. So on July 7th, finally took the equipment out and set my mind to image some planets (Venus was also in a good position).
As luck would have it, the Great Red Spot was pointing our way, and landed my best shot of it yet. We may be past the May 2018 sweet spot for opposition, but that doesn’t mean you should not attempt to observer or photograph the Jupiter. Still plenty of good days ahead.
Jupiter with moons Europa (left) and Io (right)
I took about 11 video sequences of the planet, and sure enough the last one yielded the best result. I guess as the evening progressed, the air cooled and provided for better viewing.
Televue 3X barlow
Vesta Webcam with IR/UV filter
Processing with Registax and GIMP.
Last Saturday evening, if you happened to look outside and had a clear view there is no way you could miss the Venus-Moon close encounter in the dark blue sky. But just in case it was cloudy, or you weren’t paying attention here it is.
Moon and Venus within 8 degrees on June 16, 2018
For those curious on the camera setting, the above is cropped from a single frame at 33mm f/4.5 1/30sec and ISO800 with Canon 80D.
Moving up to 85mm gives you the image below, also at 1/30sec and ISO800. Both images were hand-held from a bedroom window. Could a tripod have helped? Sure, but I figured I could do just fine , especially with image stabilization enabled on the lens.
Moon and Venus within 8 degrees on June 16, 2018
To put a bit of perspective on the distance of these two heavenly bodies and their apparent size in the sky I’ve added a bit of information on the above image. While Venus may be nearly 4 times larger in diameter, it looks quite small next to the Moon in the sky.
We don’t often look “straight up”. Unless you are laying down, it’s not a comfortable viewing position. However there is lots to see and the Big Dipper (Ursa Major) is right overhead this time of year.
Setting up a camera with a 10 second exposure can capture quite a good deal of the sky, and you don’t have to worry too much about star trails. What stands out is the large variations in the colors of stars, from cooler deep reds, to hot bright blues.
Constellations right above in the May evening.
Canon 80D (ISO 3200)
12 x 10sec (2 minutes)
In one of my previous post I mentioned how Messier 44, the Beehive Cluster, would be an easy find the evening of April 22-23, so even if I took this photo on the 21st, the same evening that I took a photo of the Moon, all I needed was to moved a few degrees north after observing the Mooon to image this large open cluster.
Messier 44 – Beehive Cluster. Benoit Guertin – taken with Skywatcher 80ED and Canon 80D
Photos of open clusters with small refractors always lack the diffraction spikes that really make the stars stand out. So a little photo editing did the trick to spice up the image.
Canon 80D ISO 3200
Stacked 22 x 10sec
The Moon should be the first thing you look at the day you get to peer through a telescope. It should also be the first thing you photograph. However don’t wait for a Full Moon. Sure a large round moon over the horizon can be breathtaking, but most of the subtle details of the lunar surface disappear under a Full Moon. The lack of shadows blends away the peaks and valleys, crevasses and ridges. It is really this dance of light and shadows that makes the craters stand out.
Click on the image below for full resolution.
Lights and shadows….
The photo above is a single shot with Skywatcher 80ED telescope and Canon 80D (ISO 200, 1/125s)
Wavelet analysis with Registax.
After a weeks of clouds, rain and even snow, I finally get a sunny weekend without a cloud in the sky. With the warmer temperatures, time to take the telescope out. Unfortunately no significant sunspot happening on April 21. Just a small region (AR2706) on the western part of the sun.
Canon 80D (ISO 100, 1/400s)
Skywatcher 80ED (80mm F/7.5)
Sun with sunspot AR2706 (21-apr-2018). Benoit Guertin