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TYC 4437-1424-1


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Correlation of the HIPPARCOS and Allegheny Observatory Parallax Catalogs
No significant difference is found between the systems of the Hipparcosand Allegheny Observatory MAP parallax catalogs. The correlation of theparallaxes of 63 stars common to both programs is 0.9995 +/- 0.0001,with an average standard deviation of the difference of 0.0023". Whilethere is no indication of systematic difference in the two programs, ourstudy suggests that the formal errors in one or both catalogs aresomewhat underestimated.

Spectral types and luminosity classifications of MAP region stars using UBVRI and DDO photometry
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1989AJ.....98.1768C&db_key=AST

An Astrometric Study of the Spectroscopic Binary ? Draconis
Abstract image available at:http://adsabs.harvard.edu/abs/1974PASP...86..448B

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Ejderha
Sað Açýklýk:18h23m12.46s
Yükselim:+72°53'40.4"
Görünürdeki Parlaklýk:9.258
özdevim Sað Açýklýk:7.3
özdevim Yükselim:-6.8
B-T magnitude:9.713
V-T magnitude:9.296

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
TYCHO-2 2000TYC 4437-1424-1
USNO-A2.0USNO-A2 1575-03955502
HIPHIP 90097
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