Abstract
Nine lightcurves of asteroid 45 Eugenia, three from 1969 and six from 1984, are given. In 1984–1985 the H 0 magnitude of Eugenia, corrected to the lightcurve maximum, was 7.47 and the slope parameter G 0 was 0.04. The north pole of Eugenia is within ±10° of ecliptic longitude 106° and latitude +26° (or 295° and +34°). This solution is consistent with an amplitude-aspect pole analysis. The sidereal period is 0.2374645 ± 0.0000002 day, or 5 hr 41 min 56.93 sec ± 0.02 sec and the sense rotation is retrograde. When observations are closest to both the north and south poles (∼30°) only one maximum and one minimum are present in the lightcurves; at other oppositions there are two of each. It is suggested that this is caused by albedo features on the surface of Eugenia.
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