Previous measurements from 2000 gave 13.14 and 5.510 hour estimates for the period.

Measurement of the magnetic moment can give useful chemical information.

Such measurements are used in the industrial world and give vital input for process control.

Finally, in 2008, a spectroscopic measurement gave a significantly lower value of 46%.

Measurements give a density inside the Cloud a little greater than 10-10 gm.

Photometric measurements reported in 1982 gave a rotation period of 8.452 hours.

Both measurements give a varying half-life between 1 and 4 hours.

Photometric measurements made in 1993 give a rotation period of 10.38 hours.

Earlier optical measurements had given an estimated diameter of about 330 50 meters.

Measurements on other bullets can give totally different results.