Asteroid: 1999 JD6

Predicted positions for POSS plate A1FV with length of trail in arcsecs and pixel. The predictor generates ephemerides for start, midth, and end of trail, along with the predicted magnitude. 

     J99J06D   1990 06 22.26389 17 22 52.06 +14 07 52.7 A1FV     17.2        675
     J99J06D   1990 06 22.28299 17 22 47.32 +14 07 39.7 A1FV     17.2        675
     J99J06D   1990 06 22.30208 17 22 42.58 +14 07 26.6 A1FV     17.2        675
                     -137.90"        -26.2"       140.4"

Actually measured positions, start and end of trail 

Observations:
     J99J06D  P1990 06 22.26389 17 22 40.85 +14 08 08.1 A1FV                 675
     J99J06D  P1990 06 22.30208 17 22 31.30 +14 07 41.1 A1FV                 675
Link to the MPEC which published the improved orbit.

DSS image of 1999 JD6 from June 22, 1990 on POSS plate A1FV