| Q: | Display on screen appears to stop when loading images. Why? |
| A: | It takes a lot of time to load images. It depends on your CPU speed. Sometimes it takes a few minutes. |
| Q: | None of the icons functions in the blink mode. Why? |
| A: | AstCat sometimes does not function properly when the Japanese character input system, MS-IME, is used. Put it in the task bar. |
| Q: | Moving the cursor on the blinking screen does not show up the position (right ascension/declination) at the cursor. Why? |
| A: | Position matching between the image and the star catalog has not been made. |
| Q: | No blinking takes place. Why? |
| A: | You need more than two images covering the same area of the sky. Load them in turn and click on blink icon. |
| Q: | Blinking does occur, but some areas are not well matched. Why? |
| A: | Either the subsequent images are rotated with respect to the first image, or they are partially distorted. This happens when the time interval is large and atmospheric conditions change over that period. |
| Q: | There is no asteroid. Why? |
| A: | Asteroids are not evenly distributed across the sky. Try other images. |
| Q: | I can see a star on and off, but it is not moving. Why? |
| A: | We think it is noise. It may also be the effect of a cosmic ray. |
