Asteroid: 1998 XM4

Predicted positions for POSS plate A0C5 with length of trail in arcsecs and pixel. The predictor generates ephemerides for start, midth, and end of trail, along with the predicted magnitude. 

     J98X04M   1993 05 24.38681 18 41 20.80 +45 50 42.0 A0C5     16.6        675
     J98X04M   1993 05 24.42327 18 41 13.40 +45 52 41.6 A0C5     16.6        675
     J98X04M   1993 05 24.45973 18 41 06.00 +45 54 41.0 A0C5     16.6        675
                     -154.73"        239.1"       284.8"
                     -153.19p        236.7p       282.0p

Actually measured positions, start and end of trail 

Observations:
     J98X04M   1993 05 24.38681 18 41 42.86 +45 52 16.2                      675
     J98X04M   1993 05 24.45973 18 41 28.20 +45 56 06.7                      675
Predicted positions for POSS plate A1CG with length of trail in arcsecs and pixel. The predictor generates ephemerides for start, midth, and end of trail, along with the predicted magnitude. 
     J98X04M   1993 06 15.28472 17 20 08.24 +57 09 42.1 A1CG     17.4        675
     J98X04M   1993 06 15.32465 17 19 59.71 +57 10 09.6 A1CG     17.4        675
     J98X04M   1993 06 15.36458 17 19 51.19 +57 10 37.1 A1CG     17.4        675
                     -138.69"         55.0"       149.2"
                     -137.31p         54.4p       147.7p

Actually measured positions, start and end of trail 

Observations:
     J98X04M   1993 06 15.28472 17 20 40.17 +57 11 25.6                      675
     J98X04M   1993 06 15.36458 17 20 22.68 +57 12 22.1                      675
Link to the MPEC which published the improved orbit.

DSS image of 1998 XM4 from May 24, 1993 on POSS plate A0C5

DSS image of 1998 XM4 from June 15, 1993 on POSS plate A1CG