This image shows two minutes motion of Potentially Hazardous Asteroid
1998 HT31 using six co-added 4-sec exposures
taken on 1998 May 8 from 00:09:01 to 00:11:02 UT
with 0.57-m f/5.2 reflector +
CCD camera SBIG ST-8 of Klet' Observatory.
The field of view is 8 to 5
arcminutes with north to the top and west to the right.
Observers J. Ticha and M. Tichy.