Asteroid 3155 Lee

3155 Lee is a main belt asteroid with an estimated diameter of about 10 km. It was discovered on September 28, 1984 by B. A. Skiff at Flagstaff. The semi-major axis is 2.34 AU, the eccentricity is 0.101 and the inclination is 7.20 degrees.

I observed this asteroid on two nights when it was in the field of of another asteroid I was observing. On analyzing the data, it was very difficult to fit a good period, until I came across a report by B. Warner in the Minor Planet Bulletin volume 30. In his report, Warner described a similar problem with this asteroid until advised by Dr. W Ryan that this asteroid had 4 minima and maxima per period. Reanalyzing my data for this, yielded a period very similar to that found by Warner. 8.358 hours against Warner's 8.312. However, although the periods were very similar, both of my nights observations showed a very deep minimum near 0.56 phase, which is absent from Warner’s data. I am uncertain what to make of this difference. This is an asteroid that is worth further observations and shape modelling.

Lightcurve results for 3155 Lee. Derived period 8.358 +/- 0.011 hours. Amplitude 0.4 +/- 0.05 magnitude.