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HD 33777

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ICCD Speckle Observations of Binary Stars. XXIII. Measurements during 1982-1997 from Six Telescopes, with 14 New Orbits We present 2017 observations of 1286 binary stars, observed by means ofspeckle interferometry using six telescopes over a 15 year period from1982 April to 1997 June. These measurements constitute the 23dinstallment in CHARA's speckle program at 2 to 4 m class telescopes andinclude the second major collection of measurements from the MountWilson 100 inch (2.5 m) Hooker Telescope. Orbital elements are alsopresented for 14 systems, seven of which have had no previouslypublished orbital analyses.
Two-colour photometry for 9473 components of close Hipparcos double and multiple stars Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.
Micrometer Measures of Double Stars Micrometer measures of 795 double stars made with the 26 inch (0.66 m)refractor of the US Naval Observatory from 1984 to 1990 are presented.
Micrometer Observations of Double Stars and New Pairs - Part Ten Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980ApJS...44..111H&db_key=AST
Visual double stars measured at Lick Observatory Mount Hamilton, California. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1979PASP...91..479H&db_key=AST
Micrometer observations of double stars.8. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975ApJS...29..315H&db_key=AST
Mesures d'etoiles doubles faites AU refracteur de 38cm de l'Observatoire de Nice. Not Available

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Pozíciós és asztrometriai adatok

Csillagkép:	Orion
Rektaszcenzió:	05^h13^m00.58^s
Deklináció:	+08Â°28'03.6"
Vizuális fényesség:	8.881
Távolság:	1086.957 parszek
RA sajátmozgás:	4.5
Dec sajátmozgás:	-4.4
B-T magnitude:	9.068
V-T magnitude:	8.897

Katalógusok és elnevezések:

Megfelelő nevek	(Edit)
HD 1989	HD 33777
TYCHO-2 2000	TYC 698-1865-1
USNO-A2.0	USNO-A2 0975-01431267
HIP	HIP 24310

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