In this tutorial, the software is used to detect an asteroid in a set of three images. Moving object detection will need at least three images, because the detection algorithm would easily confuse random bumps in the background noise or image artefacts with faint, moving objects if it would rely on two images only.
在本指南中，软件将在相关的三张图片中检测一颗小行星。移动天体检测需要至少三张图片，因为如果在两张图片中确实有小行星，那么检测将很容易被背景噪声或图片暗纹搞混乱。
1. Loading Images 载入图片
Use the 'Load Images' command from the 'File' menu to load the three images
'2000AC6_1.st6', '2000AC6_2.st6' and '2000AC6_3.st6'. As in Tutorial
I (Basic Astrometry), the software asks you to verify the date and time
for the images. The time stored in the file header of the demo images is correct,
so you just need to accept the values shown.
使用“File”菜单中的“Load Images”命令载入三张图片'2000AC6_1.st6', '2000AC6_2.st6' 和'2000AC6_3.st6'。和在指南1（基本天文测量）中一样，软件将向你确认图片拍摄的日期和时间，本例中的图片时间已经确认过，你完全接受就可以了。
2. Moving Object Detection and Astrometry 移动天体的检测和天文测量
Select the 'Moving Object Detection' command from the 'Astrometry' menu. Like
Tutorial I, the software will ask you to enter
the coordinates or the object designation. Again, you may enter '2000 AC6' in
the 'Object' field or the coordinates as seen in the screenshot shown in Tutorial
I. However, we can also use the object browser here to select the minor
planet from the MPCOrb database: Click on
the [...] button to call up that browser.
在Astrometry菜单中选择Moving Object Detection命令，就像在指南1中一样，软件将要求你输入坐标或目标名称，同样的，你可以在“目标”区域中输入“2000 AC6”或者是坐标（在指南1中的屏幕截图中）。当然，我们可以使用目标浏览，在MPCOrb数据库中选择小行星（点击[...]按钮可以看到）。
The object browser offers two controls where you can enter filter strings for the name or designation of the objects, respectively. For example, if you enter 'AC' for the filter on the designation and apply the filter by clicking the button with the red exclamation mark, the browser will show all minor planets and comets that include 'AC' in their name or designation - amongst them, you will find the minor planets (588) Achilles and 2000 AC6 as well as comet 41P/Tuttle-Giacobini-Kresak, to name a few. (Blanks in the name or designation of the object are not significant, and there is no differentiation between lower- and uppercase letters.) If you use '2000AC', as in the screenshot shown above, you will only see minor planets with that string in their designations. If you set the filter 'AC6' on the designation (or 'A06C' on the packed designation), you will see only a small number of minor planets. Double clicking '2000 AC6' in that list will select that objects, and the software will calculate the coordinates for the selected minor planet now. Press the [OK] button in the 'Coordinates' dialog to start the data reduction process.
在目标浏览对话框中分别提供了两种字符过滤的方式，比如：如果你在名称位置输入“AC”并按下了右边的带红色感叹号的按钮，浏览对话框将显示所有名称中包含‘AC’的小行星和彗星，这中间，你将会看到小行星（588）Achilles和2000 AC6和41P/Tuttle-Giacobini-Kresak彗星及一些其他的几个。（空格并不重要，不区分大小写），如果你像上图中的那样输入2000AC，你将只能看到包含2000AC字符的小行星名称，如果你在名称过滤器中输入“AC6”（或“A06C”在编号名称框部分输入），你将只能看到很少的几个小行星的名称，在那个列表中，双击2000 AC6，它将被选中，软件将计算被选小行星的坐标，在坐标对话框中点OK，软件将开始数据分类。
After a while, the software will ask the user to verify the moving objects it has detected. Similar to the verification dialog in Tutorial I, the window displays various information about the object, but this time, the zoomed image and that data is blinked to show the motion of the object and the data extracted from the three images. In addition to choosing the zoom level, you can now also select on what position the zoomed image section is centered (you can select the position of the minor planet in any of the three images, or alternatively, center on the fixed asteroid), and set the blinking frequency. In the title of the window, the speed and direction of the apparent motion for the object is displayed. Also, note that the software has identified the asteroid as 2000 AC6, even if you did enter only the coordinates (not the designation of the asteroid) before.
过一会儿，软件将会请你确认被检测出的移动目标。与在指南1中遇到的对话框类似，窗口中显示了目标的多种信息，但这次，放大的图片中显示的是动画，所有的数据都是由3幅图片得来。除了可以选择放大倍率之外，你还可以设置第几张图片中得移动目标位于居中位置（你可以选择三张图片中的任意一张中的小行星位置，或是让小行星不动），同样也可以设置动画的频率。在该窗口的标题栏上显示了该移动天体视运动的速度及方位角。请注意，即使你先前只输入了坐标，本软件还是鉴别出了2000AC6。
Image noise or artifacts sometimes mimic a faint, moving object. Sometimes, the moving object detection algorithm also confuses very faint stars or close double stars with moving objects. It is therefore very important that the user carefully checks each detection found by the software. If you find the detection uncertain, spurious or invalid, press the [Reject] button. Press the [Accept] button to store the results for real moving objects.
图片噪点及人造天体有时会很像一个暗弱的移动目标。有时，移动天体运算也会被暗弱的恒星或双星搞糊涂。所以，使用者小心仔细地检查每一个被软件自动检测出来的移动目标是非常重要的。如果你发现软件的检测是不确定的，假的或有缺陷的，请按下[Reject]按钮。按下[Accept]按钮，软件将把检测的结果储存起来。
Colored circles will be drawn around the objects detected by the software:
软件的检测结果将以彩色圈的形式显示出来：
在天文数据分类中参考星以绿圈形式显示，由于与参考星所提供的数据差异太大而被定义的“无用”参考星以黄圈形式显示。
至少在两幅图中的同一位置发现的目标（恒星）以蓝色形式显示。
被软件检测出来并被使用者接受的移动目标（小行星）以红色形式表示。
手动测量的目标（见下）将以紫色圈形式显示。
其他的检测目标以灰色圈表示，这些目标或者是移动的，或者是非常暗弱的假目标以至于软件不能在所有的图片中检测到，或者是类似于恒星的噪点。
Note: The colors listed above refer to the default settings. The colors can be changed in the Program Settings, resulting in different color coding.
注意：以上的各种颜色的定义都是软件默认的，你可以在Program Settings中设置不同的颜色。
Additional objects, or asteroids not found by the moving object detection algorithm, may be measured by clicking on them, similar to the way objects have been measured in the Tutorial I (Basic astrometry).
其他目标或没有被软件认可发现的小行星，你也许可以用指南1中的方法来测量它们。
3. Viewing the Results 查看结果
As in Tutorial I, select the 'View MPC
Report' command or the 'View Log File'
command from the 'File' menu to view the results.
像在指南1中那样，在File菜单中选择'View MPC Report'或'View Log File'命令来查看结果。