Archive for January, 2017

Ice Stars – January 8, 2017

Posted in ASTRO on January 8, 2017 by maxpho

I’m in hibernation mode…

No clear skies for some time now, lots of snow, very cold, not much to do…

It’s the perfect time to take a few shots of…snowflakes.

These images were all taken from my balcony, on a microscope slide that I’ve placedĀ  outside my window for a few minutes at -10 degrees Celsius.

Equipment: Canon 550D with a SMC Pentax M 1:2.8 28mm inverted lens, 60mm extension tubes and Nissin MF18 Macro ring flash.

Note the lovely rainbow colors at the edges and small features of the flakes.

ICESTAR1.jpg

ICESTAR2.jpg

ICESTAR3.jpg

ICESTAR4.jpg

ICESTAR5.jpg

ICESTAR6.jpg

ICESTAR7.jpg

ICESTAR8.jpg

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Horsehead Nebula – 2016/2017

Posted in ASTRO on January 4, 2017 by maxpho

My final result of the Horsehead Nebula (also known as Barnard 33) in Orion. For now at least. Next time I will image this object it will be in the light of hydrogen. For now, this is what 80 minutes (192 frames, each a 25 seconds exposure) of unfiltered data looks like under good conditions (mag +6 sky):

BARNARD33.jpg

And a smaller version, this time together with the Flame Nebula. This is a two-frame mosaic, resized to 70%.

FlameHorsehead.jpg

A crop 100% size, mosaic. A different processing workflow was used:

HIRESFlama.jpg

And the Flame nebula, reworked:

FinalFlame.jpg

NGC 891 and friends -January 2, 2017

Posted in ASTRO on January 3, 2017 by maxpho

NGC 891 is an interesting edge-on galaxy found in the constellation of Andromeda. It is “only” 30-million light years away.

Not a difficult object to observe at the eyepiece, even in small instruments. I’ve observed the galaxy at 40x magnification before starting the image acquisition, and the highly elongated shape is easily visible. Unfortunately, no dark lane observable through the 4.5 inch refractor, but I know that the dust lane is reserved to telescopes of at least 8 inches in diameter.

The interesting fact about the following image is that not only NGC891 is well visible, but many more faint galaxies are imaged all around the frame. Some go as faint as magnitude +18, some perhaps fainter.

So, the image (quite large). Note that the stars towards the corners of the image are quite elongated, due to a incorrect distance of the imaging camera from the field flattener (I shall correct that!).

ngc891.jpg

And some of the more interesting galaxies in the field, with their “proper” names and magnitudes:

around.jpg

Spending a bit more time with the above image, I’ve determined the limiting stellar magnitude in the image (+20.5), and also found out that I’ve captured the light of the two dwarf satellites of NGC 891, one of which (dwB) has a very low surface brightness and a magnitude (R) of +17.98! This is good news for me, imaging such a dim object with a rather small refractor and camera setup.

More about the two dwarf satellites can be found HERE.

And the identification:

two dwarf satellites.jpg

Star Trails at Runcu Stone – January 1, 2017

Posted in ASTRO, Uncategorized on January 2, 2017 by maxpho

A first post on this blog for 2017: a long 2-hour exposure acquired by my wife during one of our trips to Runcu Stone (Dambovita County), on the first of January 2017. She used a Canon 550D at ISO 3200 and 1 minute long subs, with a Samyang 8mm fisheye lens, all on a small tripod. I’ve only did the processing. The intense light pollution at lower right comes from the city of Sinaia.

StartrailsRuncu.jpg

 

Mars-Neptune conjunction and comet 45P – December 31, 2016

Posted in ASTRO on January 1, 2017 by maxpho

My last astro-shots for 2016: the close conjunction of Mars and Neptune and one final shot of comet 45P/Honda-Mrkos-Pajdusakova, both acquired under superb conditions at Runcu Stone, Dambovita county.

First shot shows Mars and Neptune in Capricornus in a region with a few faint galaxies. Neptune’s Triton is also detectable in the image:

MarsNeptune.jpg

Next, comet 45P imaged at an altitude of 9 to 7 degrees. Very low above the horizon but the great conditions allowed for detecting its splitting tail and a disconnecting event. The comet was well visible in 15×80 binos and a 9×50 finder.

45P Dec 31.jpg

Also, a test image of M31 with the TS 65Q APO Refractor. Some problems with the field-flattener lens and stacking issues (see the image below, left-side area), so I’ve ended up with a cropped and downsized image. The issues were resolved eventually, but for now this is the only shot using this setup. Since this image was acquired, I’ve also solved my guiding problems (using PHD and a 200mm F.L. finder scope with the ASI174MM camera), and test shots at 800mm FL with the ASI1600MM shot pinpoint stars at 5 minutes (with no binning). The following imaging sessions at Runcu Stone will produce some nice results I hope.

So the M 31 image, with an inverted view. I like the “black-hole” effect on the right hand image.

M 31 GALAXY TEST.jpg