Archive for the ASTRO Category

ISS solar transit – August 16, 2017

Posted in ASTRO on August 16, 2017 by maxpho

Another ISS transit over the Sun. This time at a better elevation, and a much larger apparent size of the ISS. A lot of luck for this transit, since only seconds after the event, some clouds rolled in and covered the Sun. The seeing was poor, but some nice structural details of the Station are visible. Also, a new sunspot groups is visible.

Equipment is mentioned on the images.


ISS transit in color.jpg

And a single frame, only a bit processed:


Sunspot group 2665 – July 11, 2017

Posted in ASTRO, Uncategorized on July 11, 2017 by maxpho

After some time (ages actually) of “astro-inactivity” I’m slowly trying to get back at it…

After the lucky ISS transit in the morning, I’ve spared two hours for some solar imaging. A lovely giant was present on the Sun, so a few quick shots were obligatory 🙂

The setup: TS APO 114mm, F/7, with the ASI 174MM camera. The Herschel wedge for White Light, and the Quark Chromosphere for H-alpha. Good seeing.

A comparison shot:

AR 2665.jpg

The White Light:

AR 2665 WL.jpg

Some H-alpha:

AR 2665 H ALPHA BW 7 19 UT.jpg

AR 2665 H ALPHA COLOR 7 19 UT.jpg


ISS and a sunspot

Posted in ASTRO, Uncategorized on July 11, 2017 by maxpho

A lucky transit of the ISS occurred over my home. Only a fast setup of the astro gear was required for this event.

The large AR 2665 sunspot group added the already interesting view.

Equipment: 127mm Maksutov, full aperture solar filter, H-alpha 35nm filter, ASI 174 MM camera.

iss bw maximilian july 11.jpg

iss color maximilian july 11.jpg

Jupiter in March 2017

Posted in ASTRO on April 7, 2017 by maxpho

These are my only two shots of Jupiter this year. At least for now. The opposition is occurring these days, but the weather these days and the low altitude of the planet are both unfavorable for a good imaging session.

Jupiter March 2017.jpg

Solar Eruption – April 3, 2017

Posted in ASTRO on April 3, 2017 by maxpho

A lovely session with the Sun today, both in H-alpha and in white-light. Two large and very active sunspot groups are still visible, one of which (named 2644) released a small eruption just as I was acquiring images.

Equipment: TS 115mm F/7 Refractor, Quark H-alpha filter, ASI 174MM, 700/2500 frames. Seeing 6/10.

flare april 3.jpg

April 3 flare.jpg

A comparison of the white light view and the H-alpha one:


A short animation spanning 27 minutes, showing the evolution of the small eruption and the plasma traveling along the magnetic field lines:

eruption april 3.gif

A filmstrip from the above animation:


And an image of AR 2645, the largest of the two sunspot groups visible on the Sun these days:

ar 2645 april 3.jpg

Markarian’s Chain – April 1, 2017

Posted in ASTRO on April 2, 2017 by maxpho

This is one shot I was planning to acquire for some time now. It shows some superbly aligned galaxies from the Virgo galaxy cluster. More about it here.

The image was acquired under rather dark skies near Runcu Stone.

Markarian's Chain.jpg

And some identified objects:


ISS over the Moon – April 2, 2017

Posted in ASTRO on April 2, 2017 by maxpho

My first transit of the ISS over a celestial body for 2017. The celestial body this time was our Moon. I’ve observed this transit together with my wife and a few other enthusiasts under a very transparent sky, with the Sun still hanging above the western horizon at the time of the transit. As for almost all these events, I had some issues with the acquisition, but the end result shows the shape of the Space Station nicely. Equipment: 115mm F/7 APO Refractor, 2.5x Powermate, ASI 174MM with UV/IR cut filter.

One crop:


And a three-frame sequence:


And a better processed image:

ISS around the Moon.jpg