Asteroids@home
|
这个页面或段落的内容需要扩展 由于信息不足等原因，这个页面或段落只提供了较少的内容，请了解相关内容的Wiki用户协助扩展。
用户 匿名用户 给出的意见是：无 。 欢迎其他用户前往讨论:Asteroids@home发表见解。 欢迎无wiki账号的用户到论坛的Wiki系统讨论区（注册）参与讨论。 |
如何加入项目
该项目基于 BOINC 平台，简要的加入步骤如下（已完成的步骤可直接跳过）：
- 下载并安装 BOINC 的客户端软件（官方下载页面或程序下载）
- 点击客户端简易视图下的“Add Project”按钮，或高级视图下菜单中的“工具->加入项目”，将显示向导对话框
- 点击下一步后在项目列表中找到并单击选中 Asteroids@home 项目（如未显示该项目，则在编辑框中输入项目网址：http://asteroidsathome.net/boinc/ ），然后点击下一步
- 输入您可用的电子邮件地址，并设置您在该项目的登录密码（并非您的电子邮件密码）
- 再次点击下一步，如项目服务器工作正常（并且有适合自身操作系统的计算程序），即已成功加入项目
更详细的加入方法说明，请访问 BOINC 新手指南 或 BOINC 使用教程。
本站推荐您加入 Team China 团队，请访问项目官方网站的 团队检索页面，搜索（Search）并进入 Team China 的团队页面，点击页面中的 Join 并输入用户登录信息即可加入！
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.