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HD 225059


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The opposition effect of 51 Nemausa.
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 afunction of rotational phase was determined to vary in the range 0.05 to0.13mag/deg. The large values are due to the opposition effect. Anephemeris for physical observations facilitated the reductions andallowed a certain identification of minor details with the 1983 and 1990lightcurves. The difficulties connected with the development oflightcurves in Fourier series are discussed. The advantage of astatistical analysis in terms of uncorrelated normal points isdemonstrated.

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Observation and Astrometry data

Constellation:Fische
Right ascension:00h02m57.09s
Declination:-00°53'37.9"
Apparent magnitude:8.089
Distance:337.838 parsecs
Proper motion RA:20.5
Proper motion Dec:-17.3
B-T magnitude:9.707
V-T magnitude:8.223

Catalogs and designations:
Proper Names
HD 1989HD 225059
TYCHO-2 2000TYC 4663-679-1
USNO-A2.0USNO-A2 0825-00012396
HIPHIP 236

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