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HD 50633


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Photoelectric filter photometry of the flux depression at 5200 A in Ap-stars
A new photometric index was used to characterize the flux depression at5200 A in a photoelectric filter photometric study of a large number ofnormal A-stars, Ap-stars, Am-stars, and Hg-Mn-stars. The new index isdefined as a = g - (h + y)/2, where g and h are the brightnesses at 5240and 5020 A, respectively, measured by interference filters, and y is thebrightness measured with a Stromgren filter. The index reveals a markedcontrast between normal and peculiar stars.

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Observation and Astrometry data

Constellation:Δίδυμοι
Right ascension:06h55m04.44s
Declination:+22°33'37.1"
Apparent magnitude:7.671
Distance:225.734 parsecs
Proper motion RA:-3.2
Proper motion Dec:-13.6
B-T magnitude:7.966
V-T magnitude:7.696

Catalogs and designations:
Proper Names
HD 1989HD 50633
TYCHO-2 2000TYC 1894-408-1
USNO-A2.0USNO-A2 1125-04677484
HIPHIP 33251

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