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HD 100797


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Measurements of visual double stars made at PIC DU Midi and at Nice
Fifty visual measures of 37 very close binaries observed with the 2-mtelescope at Pic du Midi are presented together with 601 measures of 245close binaries observed with the 74-cm and 50-cm refractors at Nice. Allmeasurements were made by micrometer with illuminated wires. With the2-m telescope, binaries as close as 0.07 arcsec are separated, usingmagnifying powers from 2500 to 5000.

Measurements of double stars at Nice with 74-cm and 50-cm refractors
A total of 717 measures of 287 binaries made at the 74-cm and 50-cmrefractors are presented. These are mostly very close binariesdiscovered recently, for which a rapid orbital motion is evident forabout 30 percent.

Micrometer measurements of visual binaries
A total of 376 micrometer measurements of 116 visual binaries made atthe Nice Observatory, France, in the years 1980-1983 is presented. Eachpair is identified by the A.D.S. number, the name of the couple, and theB.D. number. The next line gives the I.D.S. number, the A.D.S.magnitudes, and the spectral types. This is followed by the epoch of theobservation, the observed position angle and distance of the components,and the aperture of the refractor used. The means and the residuals fromknown orbits are given in the next lines. The symbol 'N' denotes thatthe observations were made with a 74-cm refractor; the symbol 'n'denotes a 50-cm refractor.

Mesures d'etoiles doubles a Meudon (3eme et derniere serie).
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1976A&AS...23..205M&db_key=AST

Micrometric Measures of Double Stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974ApJS...28..413V&db_key=AST

Mesures d'etoiles doubles faites a Nice a la lunette de 50 cm.
Not Available

Mikrometermessungen von Doppelsternen. III
Not Available

Mesures d'étoiles doubles faites au réfracteur de 38 cm de l'Observatoire de Nice
Not Available

Mesures d'étoiles doubles faites à l'Observatoire de Paris
Not Available

Mesures d'étoiles doubles faites à l'Observatoire du Pic-du-Midi en février-mars 1956
Not Available

Mesures d'étoiles doubles effectuées au réfracteur de 38 cm. de l'Observatoire de Nice
Not Available

Mesures d'étoiles doubles faites à Strasbourg en 1954
Not Available

Mesures d'étoiles doubles faites à l'Observatoire de Paris
Not Available

Mesures d'Etoiles Doubles faites à l'Observatoire de Paris (suite)
Not Available

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Сазвежђа:Лав
Ректацензија:11h36m06.72s
Deклинација:+12°51'18.9"
Apparent магнитуда:8.67
Даљина:94.607 parsecs
Proper motion RA:-90.2
Proper motion Dec:6.8
B-T magnitude:9.345
V-T magnitude:8.726

Каталог и designations:
Proper имена
HD 1989HD 100797
TYCHO-2 2000TYC 863-536-1
USNO-A2.0USNO-A2 0975-06761206
HIPHIP 56589

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