Asteroid: 2000 ET70

Predicted positions for ESO Schmidt plate 1955 with length of trail in arcsecs. The predictor generates ephemerides for start, midth, and end of trail, along with the predicted magnitude.

     K00E70T   1977 02 18.31215 13 46 31.79 -24 21 18.2          14.8        262
     K00E70T   1977 02 18.33298 13 46 16.91 -24 26 37.8          14.8        262
     K00E70T   1977 02 18.35382 13 46 02.00 -24 31 57.3          14.8        262
                     -407.06"       -639.1"       757.7"

Actually measured positions, start and end of trail, as well as calculated mid exposure position. Since there are uncertainties in the accurate time of the exposure and the duration of the exposure, these values have been derived from astrometric measurements of numbered asteroid (3816) which trail was identified on the plate.

     K00E70T   1977 02 18.30790 13 44 07.67 -23 41 54.3 ESO1955              262
     K00E70T   1977 02 18.32760 13 43 52.01 -23 47 02.2 ESO1955              262
     K00E70T   1977 02 18.34730 13 43 36.33 -23 52 12.4 ESO1955              262

Link to the M.P.E.C. which published the improved orbit.

Scanned image of 2000 ET70 from February 18, 1977 on ESO Schmidt plate 1955. Note the significant drop in brightness of the trail during approx. 1 hour exposure. This is indicative of a large lightcurve amplitude produced from a rapidly rotating, rather elongated body.