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About arbacia

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    Madrid, Spain
  1. Many tanks. To combine images taken in different days you can use Lunar Terminator Visualization Tool (LTVT) http://the-moon.wikispaces.com/LTVT I made that using a deformaton grid of the ray picture in Photoshop
  2. Today, july 12 has been selected as Amateur Astronomy Picture of the Day one of my photos of the ray system of the crater Kepler the ejecta ray system and blanket of Kepler strongly contrast against the dark basaltic material of Oceanus Procellarum. When the asteroid impact, the ejected material reflect the stratigraphic sequence: the original surface materials become deposited far awy from the rim of the crater, however, the deepest materials at the very bottom of the transient cavity are dopiseted near the rim. Thus, the rays of ejecta can be interpreted as a geological survey. What we found in the ejecta of Kepler is a great uniformity since all the ejecta are basaltic debris. By the geometry of the impact kinetic it is possible to estimater that the transient crater goes as deep as 6km beneath the surface and still did not pass all the Mare material of Procellarum basalt, therefore, at this point, basalts deposits are, at least, 6km thick. Further comments on the geology of this impact at my web site: http://www.astrosurf.com/patricio/luna/kepler.htm The same picture but with a more agresive enhancing was selected as Lunar Photo of the Day (LPOD) last june 9, 2012: Other day I got this picture near the terminator: That combined with the first shows the extension of the ray system and texture topography details Eventually I create this geologic chart: Where the Formation Fra Mauro appears in blue, Domes in Orange and eject mantle in yellow. Note the dome Kepler 1 Clear Skies Patricio
  3. "A completely new design" is for the body, not for the lens. BCO 6 and 10mm have a volcano-top inside of a ring. That dedign gives eyelash clearance at the time that doen't hurt the eyeball... The ring houses a rubber eyecup with lateral shield. BCO are made ex novo, but they are not "a new optical design"
  4. Star-Party Las Majadas 2012, Natural Park Serranía de Cuenca June 15-17, 2012 Hi, As every year I'm organizing a Star-Party in central Spain, 30km Northern the city of Cuenca, something in the middle between Madrid and Valencia. The star-party is held in a Camping placed in a Natural Park, in a mountainous area with elevations about 1500m. Besides of the astronomical obverving we will have daytime activities for all the family. We put special attention for the children. They will have a special observing sesion conducted by a teenager on a 12" dobsonian. Along the weekend will be some astronomy workshops for the children. The attendance is free, you need just to cover your own expenses. However to organize the activities would be great to be registered. We expect about 100 amateurs. Besides we usually share the telescopes, Meade Instruments Europe offers four big telescopes for the use of the attending people. All the best Patricio More information in my website (in Spanish) http://www.astrosurf.com/patricio/lasmajadas2012.htm Don't hesitate to ask me any question at patricio (at) geo.ucm.es Rock formations in one of the trips we will do. Observation area inside the camping (elevation 1500m) Luminic pollution map. Haircross for the camping. Madrid at the left, Valencia at the right.
  5. Thanks, actually because the regular seeing, the blue-channel was blured giving to the picture this aspect, like covered by a veil. On the other hand, in this picture I'm very close to the limit of resolution of my equipment. Io was just over 1 arcsec. Patricio
  6. Hi, One of the images taken those nights has been selected Astronomy Picture of the Day (AAPOD) for march 4, 2012. The picture shows Jupiter and a transit of Io while is casting its own shadow at the othe side of the Great Red Spot. In the magnifized insert, Io shows an orange colour and some darker albedo details in the polar caps. Cheers, Patricio
  7. Hi, Today I found that this picture I show you soon after I made it, has been selected as Amateur Photography of the Day for the February, 14 2012 Mars: the smooth hemisphere February 14 2012 Amateur Astronomy Picture of the Day - Astronomy.FM Mars: the smooth hemisphere Mars centered in Amazonis Planitia. This hemsiphere is particularly uniform at the telescope. The clear spot near the terminator, at the right, is Mons Olympus. This albedo feature was known by early astronomers as Nix Olympica (the snows of olympus). Polar Cap shows asymmetries and a lobe extending toward Utopia.
  8. The baader film is safe. I have been using it for years. In fact, I made a number of cells. My previous message was only a reminder about the installation of some mechanism to hold safely the cell to the telescope. A simple cord or velcro is enough. Be carefull with adhesive velcro or tape as them with the heat of the sun can detach. Patricio
  9. Just a point about safety: Use some string or velcro or whatever to strongly hold the filter to the telescope. A gust of wind could blow away suddenly the flter and that is extremelly dangerous for the observer.
  10. New: nd1.8 48mm nd3 48mm Try second hand in ebay
  11. Try with photografy filters. astronomical 2" filter mount is 48mm photography filter mount. 1,25" is 28mm 48mm filters can be found very cheap in sales and ebay. They were the standard for Leica and Canon before digital arrives.
  12. For Mars, at present I use Televue Mars typ A y Typ B (both of them are too expensive that I don't recomend you have them as first filters). What I have been using for Mars is a Baader Red filter, Baader orange and Baader Neodymium. The Neodymium is superb in Jupiter, Mars and Moon. Looks like a clear filter with a mauve tint. However this filter is opaque to yellows and in Mars and Jupiter, all the pplanet surface is rich in yellows. Blocking the yellow other colors get contrast. A natural colour contrast. The thing is that the Neodymiun filter can be stacked with Red and Orange filters to improve the views of Mars. In fact, one of the televue Mars filters is an orange with a multiband filter coating. Take your time before buying filters. Some of them have a subtle efect and that is a personal choice. Some of then represent an important investment and that money can have a better use in better eyepieces. Get the antares ND13 filter for the moon and the red filter for Moon and Mars. Both are cheap, but consider to get better eyepieces before to have a large collection of filters. Patricio
  13. For cropping the video pre-process it in Castrator Webcam Astrophotography by Emil Kraaikamp - Castrator Castrator will center (=register) all the frames on the planet and crop the frames as you whish, creating a much lighter video file. The resulting video file will weight a lot less (in this case only a few Mb) and, as the planet has been pre-registered, Registax will work better and much faster. Use a barlow or eyepiece proyection to get a bigger planet. Care with the focus, take your time to focus. Observe the stars arround, if they are blinking probably you will not get good results on the planet.
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