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HD 164760


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A photometric study of the hydrogen-deficient stars BD+1^ deg4381 (FQ Aqr) and BD-1^ deg3438 (NO Ser)
Photometric monitoring during the period 1993-1997 has been carried outin the UBV system for the cool extreme helium stars BD+1 deg4381 (FQAqr) and BD-1 deg3438 (NO Ser). Periodograms of the data for both starsfor each season of observation show the apparent presence of severalperiods but, if real, none seems to persist for more than one season.Analysis of the full data set for each star reveals no significantperiodicities, although models predict that highly non-adiabaticpulsational variations should occur in hydrogen-deficient stars at thesetemperatures (~ 10 000 K).

CCD Stromgren Photometry of Young Reddened Clusters
The capabilities of CCD uvby photometry for the study of reddened youngclusters are investigated. Observations of four fields in the directionof the clusters Basel 1, Berkeley 86, NGC 6704, and NGC 6756, with atotal of 1665 stars measured in at least the y and b bands, produce newestimates for the clusters parameters. The results are compared to thosefrom previously published studies in different photometric systemsshowing good agreement in the values of color excess and distancemodulus, with the exception of NGC 6756, for which an essentially largerdistance is found. Furthermore, the ages estimated for this cluster,Basel 1, and NGC 6704 are found to be higher than previously assumed, inparticular for the last one. The presence of red giants as clustermembers is suggested in Basel 1, NGC 6704, and NGC 6756.

Photometry of hydrogen deficient stars.
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Photoelektrische Photometrie von Shell-Sternen
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&AS...15..311H&db_key=AST

UBV-Helligkeiten von acht Sternpaaren am Äquator
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观测天体数据

星座:巨蛇座
右阿森松:18h02m47.46s
赤纬:-01°20'11.0"
视星:7.982
距离:194.175 天文距离
右阿森松适当运动:-8.5
赤纬适当运动:-16
B-T magnitude:8.16
V-T magnitude:7.997

目录:
适当名称   (Edit)
HD 1989HD 164760
TYCHO-2 2000TYC 5096-1256-1
USNO-A2.0USNO-A2 0825-11775601
HIPHIP 88376

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