Archive for November 2009

Jupiter and 3 Moons   Leave a comment

All three moons visible after reprocessing.  In Registax, lowered the Quality to 75% to add more frames, in Stack, Expand to Maximum Imagesize.  Open in Photoshop and use Magic Wand tool to select Jupiter, and expand until circle selection covers the planet and a bit beyond.  Invert the selection and use Autolevels.  This will bring out the moons.   Use the Clone Stamp Tool to erase the noise around Jupiter.  Since it is not selected, you can brush over it.  Invert the selection and sharpen a bit.  Crop the image, convert to grayscale in Mode and save for web and devices.  Post.


Posted November 25, 2009 by finkh in Uncategorized

Jupiter and moons   Leave a comment

Jupiter and two moons, 5:45pm November 22, 2009.  Zhumell 10″ f/5 dobsonian with monochrome Scorpion camera.  Jupiter drifts across field of view; no tracking.   One alignment on Jupiter smeared the moons.  300 of 410 stacked.  The moons were invisible when saving as jpeg, so I selected all but Jupiter and pegged the brightness (+150) in Photoshop to make them visible.

Posted November 22, 2009 by finkh in Uncategorized

Apollo 15 landing site Relief Map   4 comments

I’ve begun a project to print lunar surface features using a rapid prototyper, or 3D printer.  The Clementine data is only one kilometer per pixel.  The Japanese Space Agency, JAXA,  published lunar DEM, or Digital Elevation Model last week,  but the only data currently available is 16 pixels per degree.  A staffer on the Lunar Reconnaissance Orbiter mission kindly pointed me to the little high-resolution data available at the USGS website.  The highest resolution lunar terrain model that  exists and is open to the public is a model of the large area around the Apollo 15 landing site.  It is about 450 km on a side, and there is  a 10 meter/post version from Apollo Panoramic Camera images, and a 50  meter/post version from Apollo Metric Camera images, these models were created by the USGS.  You can find the USGS models on this page:
They are the 1.9 GB download labeled ‘Hadley Rille Panoramic Stereo Model.’

The above image was generated from the 50 meter/post version.  The data was read into Mathematica, and the function ReliefPlot generated the image, initally ten million points and 265 meg.  I saved the map as a jpeg.  You can see some of this image in Google Earth, after selecting the Moon from the Planets menu and searching for Rima Hadley.

This is a 3D plot of a portion of the above data.  The z direction in and out of the screen is exaggerated.

The final product:

Posted November 17, 2009 by finkh in Uncategorized

Clavius closeup   Leave a comment


More from November 9.    65 of 715 frames stacked.

Posted November 10, 2009 by finkh in Uncategorized

Straight Wall   Leave a comment


November 9, 2009.

Posted November 10, 2009 by finkh in Uncategorized

Mars   Leave a comment


Captured at f/15.   Currently Mars is 8.3 arcseconds.   At one arcsecond per pixel,  it looks pretty lonely in that 1.4 megapixel frame.  Zoomed view after processing.

Posted November 9, 2009 by finkh in Uncategorized

Copernicus Closeup   Leave a comment


Captured using Astro IIDC with Point Grey 1.4mp Scorpion Monochrome camera on rear port (prime focus) of ETX-125 f/15 Maksutov-Cassegrain telescope polar aligned November 9, 2009 at about 2am.  38 of 465 frames.  Registax 5 lets you limit your stack based on quality; these frames were 85% or better.

I export avi from Astro IIDC to process in Registax.  There’s a 4Gb limit on avi so I had to trim the original in Quicktime Player before exporting.  The best Copernicus I’ve done.

Posted November 9, 2009 by finkh in Uncategorized