Asteroid: 1999 LT7

Predicted positions for POSS plate A05T with length of trail in arcsecs and pixel. The predictor generates ephemerides for start, midth, and end of trail, along with the predicted magnitude. 

     J99L07T   1987 04 21.32500 15 26 26.08 +29 33 08.0 A05T     18.1        675
     J99L07T   1987 04 21.34583 15 26 12.95 +29 32 32.1 A05T     18.1        675
     J99L07T   1987 04 21.36667 15 25 59.83 +29 31 56.2 A05T     18.1        675
                     -342.53"        -71.8"       350.0"
                     -339.14p        -71.1p       346.5p

Actually measured positions, start and end of trail 

Observations:
     J99L07T 5 1987 04 21.32500 15 32 14.33 +27 38 55.6                      675
     J99L07T 5 1987 04 21.36667 15 31 48.40 +27 38 00.6                      675
Link to the MPEC which published the improved orbit

DSS image of 1999 LT7 from April 21, 1987 on POSS plate A05T