Archive for Casio Exilim EX-Z80

Silberschlag casts two shadows

Posted in Astrophotography with tags , , , , , , , , on 2009/04/03 by computerphysicslab

Silberschlag is a small Moon crater near Mare Tranquillitatis. What is my surprise when I observe that this crater shadow is proper of two peaks instead of a crater rim. Watch the picture and think about it. Is that normal?

Silberschlag crater

55 frames stacked in Registax

Posted in Astrophotography with tags , , , , , on 2009/04/02 by computerphysicslab

After stacking 55 frames of yesterday’s Crescent Moon, forcing a bit the saturation, and sharpening using the finest wavelet available, I am proud to introduce this Moon picture:

Moon and Registax

Foggy Crescent Moon

Posted in Astrophotography with tags , , , , , on 2009/03/31 by computerphysicslab

Yesterday’s moon was a bit foggy in my location. Nevertheless I got an image that I am very proud of, because it is the first time I obtain a nearly perfect focus thanks to the binocular focus tip. When doing afocal exposures, you may get a sharp focus using another binocular over the lens. This way you guarantee an infinite precise focus for the camera.

This image was taken as usual, through Vixen 12×80 binoculars and with the Casio Exilim EX-Z80 pocket digital camera. I used only green channel data, because it was the sharpest.

Crescent Moon

Looking for Sirius B

Posted in Astrophotography with tags , , , , on 2009/03/31 by computerphysicslab

Sirius is a difficult binary system, hard to resolve. I am trying it, and I have got one image that shows a dim star very near to Sirius A, but I think it isn’t Sirius B. I have been trying to find out which is the name of the star. I still don’t know it. Searching in Internet (and star atlas) other images of the area I see the star exists, but with no name so far. Here are the sources found:

Mizar & Alcor

Posted in Astrophotography with tags , , , , , , , , , , , on 2009/03/24 by computerphysicslab

Mizar and Alcor are probably the most well known double star in the sky. Located in Ursa Major,it is very easy to separate Mizar from Alcor, even with the unaided eye.

Sidus Ludoviciana is the faint star between Mizar and Alcor. Mizar is the brightest one, which in fact is a binary system: Mizar A & B, with an angular separation of 14 arcseconds.

Photo taken with the dobsonian reflector Meade Lightbridge 16″, using afocal eyepiece proyection. Here we see 222 shots of 0.5 seconds of exposure stacked. No tracking, shift-and-add method.

Mizar & Alcor

Where is Sirius B?

Posted in Astrophotography with tags , , , , , , on 2009/03/23 by computerphysicslab

After resolving the binary system of Castor I tried unsuccessfully to spot Sirius B. Theoretically it is possible using the Meade Lightbridge 16″, but maybe another luckier night … Integrating 200 half second exposure frames I got this result:

Sirius through Lightbridge 16

Chertan in Leo Major

Posted in Astrophotography with tags , , , , , , , , on 2009/03/23 by computerphysicslab

Chertan is an important star as a reference to locate several galaxies in the area, for example M65 and M66. Tonight I have stacked 550 shots into one image. The night has been clear, but I am located in a light polluted urban area. It has been necessary to substract the pollution from the background twice. The map shows stars up to 10th magnitude and the photo shows up to 12th magnitude.

Chertan - Photo and Map