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HD 204011

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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.
ICCD Speckle Observations of Binary Stars. XVII. Measurements During 1993-1995 From the Mount Wilson 2.5-M Telescope. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1997AJ....114.1639H&db_key=AST
An astrometric catalogue of stars in the region of M15 We present positions and proper motions with respect to the PPMcatalogue of 863 stars in a field of 8 deg x 6 deg centered on theglobular cluster M15. The catalogue is based on measurements of 136plates from the Carte du Ciel telescope of Bordeaux, the CERGA Schmidttelescope, and the double refractor of Bonn. The modal accuracy of theproper motions is +/- 0 arcsec 15/100 a.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:	Tay
Sað Açýklýk:	21^h25^m26.92^s
Yükselim:	+11Â°20'45.7"
Görünürdeki Parlaklýk:	8.243
Uzaklýk:	291.545 parsek
özdevim Sað Açýklýk:	-2.8
özdevim Yükselim:	-23.4
B-T magnitude:	8.853
V-T magnitude:	8.294

Kataloglar ve belirtme:

Özgün isimleri	(Edit)
HD 1989	HD 204011
TYCHO-2 2000	TYC 1114-283-1
USNO-A2.0	USNO-A2 0975-20328235
HIP	HIP 105784

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