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Jun 302012
 

The sky-glow due to a waxing moon had called a halt to the imaging that I was doing, so I decided to cut the evening short.  I was able to get an astrometry series of (90462) 2004 CA36 accomplished before the sky had gotten too bright.  My habit is to check the meteor detector results each morning, since I couldn’t possibly miss anything in the sky while sitting in the observer’s chair.  But last night I decided to do a quick check before locking up.  This is what I found. 

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The apparent bolide was travelling roughly north to south.  North is up; West is right in the video.  The time stamp shows just about 5 seconds from first sight to post flash. 

I must have been very intently processing images to have missed this.  OK, maybe I nodded off.  Either way, I did not hear or see anything but as you can tell the telescope was pointed away from the flight path.  I have not heard of any visual sightings yet.  I will update this post if I do.

UPDATE (3 July 2012) : Fellow EAAA member Dewey Barker provided the following visual observation.  The EAAA held a star gaze at Big Lagoon State Park on Friday night (the 29th).

“Lyen and I saw this during the Big Lagoon Gaze Friday night and I had forgotten to mention it in my report.  I had just stepped away from Lyen’s scope and was looking towards Lyra.  It was a slow moving object and seemed kind of low and it initially broke into at least 5-6 separate streamers before flaring up and vaporizing.  It was bright enough to cast shadows and was also spotted by Perry V. in Pace.  He gave me a call to see if we had seen it as well.  Based on trajectory and the break up, I suspected that this might have been space junk, but I sure wish I had my camera out for this one, it was stunning.”

Dewey, thanks for the confirmation.

 Posted by at 11:22
May 252012
 

”]Initially discovered in 1775, this globular cluster was independently recovered in 1777 by Charles Messier and added to his list.  One of the most distant globular clusters, M 53 is currently 60,000 light years distant from the galactic center and almost as far from the solar system (58,000 LYs).  The cluster is some 220 LYs in diameter, has a visual magnitude of 8.3 and is located in the northern constellation Coma Berenices (Berenices’ Hair).

This image was taken on the night of May 14.  With a limiting magnitude of 19.1, it consists of 120 ten second exposures.

 Posted by at 00:28
Mar 222012
 

The great English astronomer William Herschel first used the term globular cluster (derived from the Latin globulus – little sphere) in 1789. Globular clusters are, usually, very distinct. Thousands to a million stars packed into a tight spherical area is the defining visual characteristic. Located in the constellation Coma Berenices ( Berenices Hair) NGC 5053 doesn’t look the part of globular cluster, but numerous spectroscopic analyses show that it is. NGC 5053’s height above the galactic plane and the lack of metals in its stars also indicate it is globular in nature. In 2006, a study found a faint 6 degree tidal tail indicating that its close path to the Milky Way may be responsible for the dispersed nature of the cluster.

”]Nothing in this image is visible to the naked eye.

I took this image on the 17th of March. The image is a stack of 56 thirty second exposures and as usual north is to the right, east is up.

 Posted by at 09:11
Dec 312010
 

 

This is the Crescent Nebula (NGC 6888) in the constellation Cygnus (The Swan).  The bright star in the center of the picture (HD 192163), known as a Wolf-Rayet star, is a massive star nearing the end of its life.  Earlier in its elderly life the star became a red giant and shed its outer layers into space at the relatively slow speed of about 20,000 mph.  A subsequent event, powered by deeper more energetic layers, ejected gas at the much higher speed of about 3,000,000 mph.  What we see is the second wave of gas running into the first and ultraviolet energy from the stars core causing the piled up gas to glow.  This is all a precursor to a future supernova.

 The Crescent Nebula is about 5,000 light years(Ly) away and is about 18Ly by 25Ly in size.

 This nebula is a fairly faint nebula.  The image is a stack of 120 30-second exposures (L:30x30s,R:30x30s,G:30x30s,B:30x30s).  With only 30-second exposures the image only shows the brightest part of the whole nebula.

As with most of my images North is to the right and East is toward the top.

 Posted by at 13:07  Tagged with: