The opposition effect of 51 Nemausa *
Leif Kahl Kristensen and
Received 3 October 1996 / Accepted 3 December 1996
From three nights of uvby-observations of 51 Nemausa in September 1994, covering solar phase angle 0 64 to 1 37, the phase factor as a function of rotational phase was determined to vary in the range 0.05 to 0.13 mag/deg. The large values are due to the opposition effect. An ephemeris for physical observations facilitated the reductions and allowed a certain identification of minor details with the 1983 and 1990 lightcurves. The difficulties connected with the development of lightcurves in Fourier series are discussed. The advantage of a statistical analysis in terms of uncorrelated normal points is demonstrated.
Key words: asteroids methods: data analysis methods: individual: 51 Nemausa
© European Southern Observatory (ESO) 1997
Online publication: June 5, 1998