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HD 255138

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Equatorial coordinates of double and multiple star components measured on GPO astrographic plates Equatorial coordinates are given for some of the multiple starcomponents having incomplete or inconsistent information in the IndexCatalog of Visual Double Stars. Two photographic plates were taken foreach system with incomplete or inconsistent information using the GPOastrograph. The plate measurement and reduction techniques used aredescribed.
Photoelectric measurements of lunar occultations. VIII Photoelectric timings are reported for 276 lunar occultation eventswhich were observed between March 1975 and February 1976. The timings(in UTC) are based on Loran G equipment of a lunar laser-ranging groupor on WWV signals. Angular diameters are determined for HR 5301, HD176124, Chi-1-Orionis, and HR 601. Twenty cases of possible or actualdouble stars, including Beta Capricorni, are noted along with oneprobable triple system (51 Piscium). Several technical and computationaldifficulties encountered in this program are discussed.
Mesures d'étoiles doubles visuelles Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1970A&AS....3...71M&db_key=AST
Mesures d'étoiles doubles faites au réfracteur de 38 cm de l'Observatoire de Nice Not Available

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Osservazione e dati astrometrici

Costellazione:	Orione
Ascensione retta:	06^h19^m45.87^s
Declinazione:	+20Â°24'57.4"
Magnitudine apparente:	9.246
Moto proprio RA:	10.1
Moto proprio Dec:	-27.2
B-T magnitude:	9.972
V-T magnitude:	9.306

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 255138
TYCHO-2 2000	TYC 1323-585-1
USNO-A2.0	USNO-A2 1050-03335558

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