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APPROXIMATE asteroid positions for HI1-A based on the file 20090408_064901_s4h1A.fts:
(Note: the pixel coordinate origin (0,0 location) is the lower-left corner) 

Asteroid designation/name:  X-position, Y-position
----------------
43 ARIADNE:  672, 435
52 EUROPA:  26, 792
58 CONCORDIA:  33, 652
69 HESPERIA:  860, 756
171 OPHELIA:  253, 588
195 EURYKLEIA:  891, 313
238 HYPATIA:  73, 736
250 BETTINA:  5, 418
334 CHICAGO:  565, 692
405 THIA:  523, 279
442 EICHSFELDIA:  97, 723
454 MATHESIS:  518, 449
505 CAVA:  255, 785
535 MONTAGUE:  59, 701
568 CHERUSKIA:  570, 231
596 SCHEILA:  61, 847
----------------
NOTE: Not all of these asteroids will be visible, and not all visible asteroids
are recorded in this file.  This is just a guide, not an exhaustive list.
Also note that for HI-1B, these positions have an error of up to +/- 10 pixels.