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TYC 4645-98-1


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A Catalog of Variable Stars based on the new name list
We present a new electronic version of the General Catalog of VariableStars (GCVS) based on the new IAU name list of confirmed variable stars.The catalog contains 1270 stars, most of them contained earlier in theNew Catalog of Suspected Variable Stars or its supplement. A number ofrecent studies—including those by authors of the catalog, whoinvestigated many stars using data from modern automatic surveys,determined light-curve elements for periodic stars, and plotted numerouslight curves—have made it possible to move these stars to theGCVS. Among the catalog objects, 24 stars are novae or other unusualvariable stars that acquired their GCVS names out of the usual order,upon communication from the Bureau of Astronomical Telegrams of theInternational Astronomical Union. We present the GCVS names,coordinates, classifications (in two forms: the GCVS system and a new,proposed system), brightness-variation limits, and light-curve elementsfor the catalog stars, as well as bibliographic references and remarkswhen necessary. We discuss several catalog stars that are ofastrophysical interest or caused problems during the compilation of thecatalog.

A new catalogue of eclipsing binary stars with eccentric orbits
A new catalogue of eclipsing binary stars with eccentric orbits ispresented. The catalogue lists the physical parameters (includingapsidal motion parameters) of 124 eclipsing binaries with eccentricorbits. In addition, the catalogue also contains a list of 150 candidatesystems, about which not much is known at present.Full version of the catalogue is available online (see the SupplementaryMaterial section at the end of this paper) and in electronic form at theCDS via http://cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/MNRAS/(vol)/ (page)E-mail: ibulut@comu.edu.tr

New Elements for 80 Eclipsing Binaries IV.
This research presents new elements for 80 eclipsing binaries found withthe help of the ASAS-3, Hipparcos and NSVS databases.

Mean places for 42 of the brighter stars within 1 of the NCP-1978.0.
Not Available

Revised Elements of Eclipsing Stars
Not Available

Positions and proper motions of stars observed with the polar telescope at Pulkovo.
Not Available

Photographic and photovisual magnitudes of stars in Harvard Standard C regions.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1958AJ.....63..474B&db_key=AST

Photo-electric colours of B- and A-type stars in a number of Selected Areas
Not Available

Photoelectric Studies. I. Color-Luminosity Array for Members of the Hyades Cluster.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1950ApJ...111...65E&db_key=AST

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观测天体数据

星座:小熊座
右阿森松:12h57m34.64s
赤纬:+88°57'27.3"
视星:9.807
右阿森松适当运动:7.6
赤纬适当运动:-6.7
B-T magnitude:10.224
V-T magnitude:9.842

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TYCHO-2 2000TYC 4645-98-1
HIPHIP 63245

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