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TYC 611-628-1


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Lightcurves of 10 Hygiea, 241 Germania and 509 Iolanda
The asteroids 10 Hygiea, 241 Germania and 509 Iolanda have been studiedphotometrically. From their lightcurves, synodic periods of 27.63 +/-0.02, 15.51 +/- 0.01 and 12.72 +/- 0.02 hours, and amplitudes of 0fm 28,0fm 17 and 0fm 45, have been deduced for 10 Hygiea, 241 Germania and 509Iolanda, respectively. The period found for 241 Germania is asignificant revision from one previously published, and we present afirst indication of pole orientation and shape. A synodic period isobtained for 509 Iolanda. The solution obtained for the sense ofrotation, sidereal period, pole orientation and shape properties for 10Hygiea confirms previous results.

A catalog of precise reference star positions for the astrometry network of the international comet P/Halley compaign
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1987A&AS...71..525D&db_key=AST

Measurements of binary stars performed at Nice (Second series)
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1984A&AS...57..467M&db_key=AST

Mesures d'etoiles doubles faites a Nice.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978A&AS...33..275M&db_key=AST

Relative motions of 17 visual double stars
The relative motions of 17 visual stars are studied; the data cited indeveloping the equations of relative motion are often from observationsmade 50 or more years ago. The results are compared with the data fromSAO, IDS and AGK catalogs.

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Observation and Astrometry data

Constellation:Ιχθείς
Right ascension:00h55m07.79s
Declination:+13°32'58.5"
Apparent magnitude:9.534
Proper motion RA:82.4
Proper motion Dec:-66.9
B-T magnitude:10.28
V-T magnitude:9.596

Catalogs and designations:
Proper Names
TYCHO-2 2000TYC 611-628-1
USNO-A2.0USNO-A2 0975-00195910
HIPHIP 4302

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