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HD 222561 (104 Aqr B)


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Variations of AP stars in the Geneva system
The photometric behaviour of 21 Ap stars has been analyzed fromobservations obtained in the Geneva system. Variability has beendetected for 9 Ap stars, as well as for a star which initially was acomparison star. Preliminary values for the periods are presented aswell as an analytical description of the light curves. based onobservations made at the Swiss telescope of the European SouthernObservatory, La Silla, Chile. Complete Table 4 is available inelectronic form at the CDS via anonymous ftp 130.79.128.5 orhttp://cdsweb.u-strasbg.fr/Abstract.html and full figures are accessibleon the on-line version of the paper.

Catalogue et bibliographie des étoiles A à spectre particulier - Deuxième supplément
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A study of visual binaries having primaries above the main sequence.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1960AJ.....65...60S&db_key=AST

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Observation and Astrometry data

Constellation:Aquarius
Right ascension:23h41m46.38s
Declination:-17°47'00.7"
Apparent magnitude:8.543
Distance:279.33 parsecs
Proper motion RA:-27.9
Proper motion Dec:-30.4
B-T magnitude:8.726
V-T magnitude:8.559

Catalogs and designations:
Proper Names104 Aqr B
A2 Aqr
HD 1989HD 222561
TYCHO-2 2000TYC 6407-93-1
USNO-A2.0USNO-A2 0675-37493533
HIPHIP 116904
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