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HD 917


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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.

Emission-Line Stars Associated with the Nebulous Cluster NGC 2264.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1954ApJ...119..483H&db_key=AST

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Observation and Astrometry data

Constellation:Pisces
Right ascension:00h13m32.42s
Declination:+00°50'49.1"
Apparent magnitude:9.601
Proper motion RA:68.7
Proper motion Dec:-26.1
B-T magnitude:10.841
V-T magnitude:9.704

Catalogs and designations:
Proper Names
HD 1989HD 917
TYCHO-2 2000TYC 2-291-1
USNO-A2.0USNO-A2 0900-00052857
HIPHIP 1087

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