Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_banner_through_the-_eyepiece_winners.thumb.jpg.236833c5815bb321211a43f4d5214ba8.jpg

astroavani

Advanced Members
  • Content Count

    1,148
  • Joined

  • Last visited

  • Days Won

    11

astroavani last won the day on September 14 2018

astroavani had the most liked content!

Community Reputation

5,470 Excellent

About astroavani

  • Rank
    Sub Dwarf

Profile Information

  • Gender
    Male
  • Interests
    Astrofotografia
  • Location
    Canoas, Brazil
  1. astroavani

    Janssen

    LOL, you have discovered my secret!
  2. astroavani

    Janssen

    Hello Friend Chris! The right filter for the moon will also depend somewhat on the telescope used and the aperture. The IR 685 does very well in SCT and Newton, but in a 152mm acromatic refractometer did not work. The best result I got with a green filter or even a Solar Continuum from Baader. I believe this is because refractors are optimized for the green wavelength of the spectrum. But when using the solar continuum filter do not forget to overlay it with a UV-IR cut filter because it presents a serious leak in the infrared that degrades the image.
  3. astroavani

    Playing with QuickMap

    https://www.astrobin.com/full/385171/0/ Long ago I did not use the LROC / QuickMap Query Tools tool, for those who do not know, this tool can be very useful for serious lunar surface research. With it, we can plot altimetric profiles (as I did when I verified the discovery of a ghost crater) and even make 3D projections from somewhere. QuickMap can be accessed at this link: https://quickmap.lroc.asu.edu For those who have not yet had the opportunity to meet you, I suggest you follow the link and make an incredible flight on the lunar surface that you will never forget. Using the Query Tools tool I have created 3D projections of the 4 craters of the title to give an idea of what can be done. Now it's up to you! Open the link, enjoy yourself, knowing a little more about our Moon.
  4. astroavani

    Janssen

    Hello Ruud! Nodoso for us means bulging, concave, are rounded protrusions.
  5. astroavani

    Janssen

    Is there any dull corner of the moon? There are always places with craters that look a lot like each other, but somewhere there are usually oddities and other traits of interest. The low solar illumination of this great image reveals all kinds of small-scale texture in Janssen. It also suggests that the channel that appears to extend from the main line and curves toward the south edge crosses a dome. Using LOM QuickMap altimetry profiles it is confirmed that there is an increase there, it is about 350 m high and 30 km wide. The texture of the nodosa surface does not resemble a typically smooth sea lava that usually forms domes. It could be sea lava that was bombarded by nearby Fabricius ejecta. Although there is some sea lava about 600 km away at Mare Australe, I doubt that such a lava erupted on Janssen's ground. But the existence of a family of channels on the floor of Janssen has never been well explained. On the QuickMap check I noticed that this small curved channel, about a mile wide, has a much higher north side than the south side, and the last 10 km is not a channel, but rather an escarpment. Source: Chuck Wood - LPOD https://www.astrobin.com/full/384709/0/
  6. astroavani

    Testing new processing techniques!

    Hello It was asked by some colleagues of Astrosurf that I post the raw image that gave rise to the Saturn images posted above, I believe that perhaps someone here is also interested in comparing the before and after treated. Everyone knows that the original image was a movie, this movie was made using Fire Capture. It captured 10,000 frames of which I piled 3916 to get the raw image below without sharpened by 50%, and with sharpened by 50% on AS! 2. Registax processing is a routine processing used by most planetary astrophotographers, in it I apply the wavelets, brightness, contrast and let the program itself establish an automatic RGB balance to stay in that color that was posted above. Then it is the case to just give another sharp one in Fitswork which is the program that really greatly improves noise and sharpness.
  7. astroavani

    Testing new processing techniques!

    Hello everyone, thank you for the comments! In all the photos I tried to do a very smooth processing because I believe that the original images should not be too much altered under penalty of being artificial. So I just tried to remove the noise and gently pull out the details.
  8. Image above or left before, below or right after the new techniques.
  9. astroavani

    The Importance of Using Filters

    Excellent explanation friend Vlaiv! In fact I'm looking forward to testing the Solar Continuum, the problem was that I bought it a little while ago and I have not yet had the opportunity to try it out as I would have liked to have it in the dark. But today I am preparing a session that should shed some light on this subject, I hope to post it briefly the evidence of our thinking.
  10. astroavani

    The Importance of Using Filters

    I received a double stack just two weeks ago, so I did not have time to test it calmly, but I realized that in the achromatic refrator AR 152mm it was the filter that gave me the best result. But as they are only 150mm nominal aperture this was already expected. I want to test now with the great opening of the C14!
  11. Even a great camera and a great telescope, nothing can do against a bad seeing. But there is one factor, which allows an experienced photographer to work around this problem. This factor are the filters, well used, are fundamental in the most diverse fields of photography. In high resolution Lunar and planetary photography, they can simply save a session that would simply be lost. We all know that the smaller the wavelength, the higher the resolution. From this it can be deduced, that the Infrared having long waves, will have a resolution much smaller than the green or blue, which has shorter waves for example. Therefore, we should only use the short-wave filters in high-resolution photography, but here is the crucial factor we mentioned above, seeing. If seeing is good, everything points to using a green filter, or even blue, on a photo that will be converted to black and white. However as most of the time the seeing is from medium to bad the use of a red filter or even Infrared can simply save the job. This is because long waves are less affected by turbulence or bad seeing than short waves. In the case of the attached photo, we have an evident proof of this affirmation, I estimate that the seeing should be around 2/5, 1 being considered lousy, and 5 would be excellent. When we look at the photos carefully, we can see the continuous gain in terms of resolution, of the wave filters getting longer. In the end, everything depends on the experience of the photographer, knowing how to analyze the moment of capture and thus use the one that is the most appropriate filter. Photos taken at intervals of 1 minute from one to another, for each photo 2500 frames were captured and 345 stacked. All stacked in AS! 2 with 50% sharpned. No further processing was done, trying to keep them as homogeneous as possible. https://www.astrobin.com/full/382824/0/?nc=
  12. astroavani

    A flight over the Mare Crisium

    Thanks colleagues!
  13. astroavani

    A flight over the Mare Crisium

    Another photo to evidence the edge to the east of Mare Crisum, But this without many outstanding formations if we do not take into account the two craters that are located near the West border; Peirce and Picard. Some mountain peaks can also be seen against the black background of the sky, but what really caught my attention was the 3D feel that conveys the mountains that form the eastern edge of the sea. Promontorium Agarum and several other mountains located in front of Mare Anguis, are a real show apart, giving to realize clearly, that are true elevations in relation to the adjacent land. What spoils a little is the lack of contrast due to the Sun being practically the pin in this region, but nothing that spoils the beauty of a photo made with all affection. https://www.astrobin.com/full/382273/0/?nc=user
  14. This is a region I can not help but admire, in my humble opinion one of the most beautiful places on the lunar rim since, if you have the happiness of observing or photographing in a proper hoax. When the Moon stands on a suitable slope, the mountains that border the edge of the Mare Humbolditianum stand out against the black background of the sky in a wonderful way. You who like to observe or photograph the Moon must always be aware of these opportunities caused by the hovering movement. The Libration event is due to the non-perfect synchronism of the rotation and revolution of the Moon, which allows us to observe around 9% of the lunar face (the boundary zone of the hidden face) opposite the Earth, which is invisible when we observe the Moon our position on Earth. The hover happens due to the actual or apparent displacement (oscillation) of the lunar axes relative to their average positions. Consequently, this "reeling" of the Moon allows us to see 59% of its surface at certain moments. These maximum hovering moments between North, South, East and West Libration, whether in latitude or longitude, offers us an interesting opportunity to make observations and images of these lunar regions still unknown to most of us. https://www.astrobin.com/full/382097/0/?nc=user
  15. astroavani

    Sinus Iridum

    Sinus (Small Bays or '' Plain '') - Small gulf, narrow mouth, which extends inland. Ex Sinus Iridum (attached image). Sinus Iridum, its crater and the Jura Mountains, are a favorite target of all lunar observers. The mountains always seem to catch the light in a special way, and in good lighting conditions, it has a very interesting contrast mixing the brightness to the darkness of both sides. The low sun on the ground is something to be vaulted, so each small crater stands out as a ring of light. This low illumination also emphasizes the sea and the backs (peculiar and low sinuous protrusions) making them very prominent and easily visible on the flat floor of the bay. The Promotorium Laplace and Heraclides advance to the sea giving this resource a unique feature that has no equal on the Moon An area worthy of further study and photography! https://www.astrobin.com/full/381805/0/?nc=user
×

Important Information

By using this site, you agree to our Terms of Use.