Asteroids@home

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rebirther
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Asteroids@home

#1 Post by rebirther » 18.06.2012, 15:52

http://asteroidsathome.net/boinc/

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Asteroids@home is a research project that uses Internet-connected computers to do research in Asteroids@home. You can participate by downloading and running a free program on your computer.
Asteroids are the most numerous objects in the solar system. So far, hundreds of thousands of asteroids are known, with hundres of new discoveries every day. Altough the total number of known asteroids is large, very little is known about the physical properties of individual objects. For a significant part of the population, only the size of the bodies is known. Other physical parameters (the shape, the rotation period, direction of the rotation axis,...) are known only for hundreds of objects.

Because asteroids have in general irregular shapes and they rotate, the amount of sunlight they scatter towards the observer varies with time. This variation of brightness with time is called a lightcurve. The shape of a lightcurve depends on the shape of asteroid and also on the viewing and illumination geometry. If a sufficient number of lightcurves observed under various geometries is collected, a unique physical model of the asteroid can be reconstucted by the lightcurve inversion method.

The project Asteroids@home was started with the aim to significanly enlarge our knowledge of physical properties of asteroids. The BOINC application uses photometric measurements of asteroids observed by professional big all-sky surveys as well as 'backyard' astronomers. The data is processed using the lightcurve inversion method and a 3D shape model of an asteroid together with the rotation period and the direction of the spin axis are derived.

Because the photometric data from all-sky surveys are typically sparse in time, the rotation period is not directly 'visible' in the data and the huge parameter space has to be scanned to find the best solution. In such cases, the lightcurve inversion is very time-consuming and the distributed computation is the only way how to efficiently deal with photometry of hundres of thousands of asteroids. Moreover, in order to reveal biases in the method and reconstruct the real distribution of physical parameters in the asteroid population, it is necessary to process large data sets of 'synthetic' populations.

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odicin
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Re: Asteroids@home

#2 Post by odicin » 13.02.2022, 14:20

Server status - offline

Update - 02-12-2021

Project servers are currently offline for longer period than expected. The main reason is that waiting for a new server took longer than expected. We finally have a new server but it will still take some time to start the project again. The new server will be at a different location than old servers are, all the project data have to be transferred there and BOINC server must be upgraded to the latest version before running up again. The project was running on three servers which two of them crashed. BOINC project data was using those two bad servers, non-BOINC project data was on the third server. New server will be running BOINC project data from both bad servers.

I am sorry I didn't post any news earlier. If needed I will post additional information here. I suppose that the project will be ready to continue by the end of month. This website is now running temporary on a Raspberry Pi and will switch to a new server when ready.
Könnte also noch etwas dauern bis das Projekt wieder online ist.

Gruß Odi

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DoctorNow
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Re: Asteroids@home

#3 Post by DoctorNow » 15.03.2022, 12:33

Asteroids ist nun schon länger down als erwartet und die Stats-Seiten haben es bereits stillgelegt.
Ich tu es denen mal gleich und verlege den Thread bis auf Weiteres. Vielleicht kommt das Projekt ja später doch wieder.
Life is Science, and Science rules. To the universe and beyond
Member of BOINC@Heidelberg + BOINC Confederation
My BOINC-Stats / My Badges-List

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odicin
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Re: Asteroids@home

#4 Post by odicin » 22.06.2022, 06:29

Project Asteroids@home
Server status - online
Project status - offline

Update - 17-06-2022

New server is finally up and running. Website has been transfered to the new server and we now have to trasnfer all project data from old server to the new one. It will take approximately 2 weeks and after that the final project configuration will be made.
Ich schiebe es daher aus retired mal zurück zu den Projekten...

Gruß Odi

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