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HD 217842


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Ýlgili Makaleler

New periodic variables from the Hipparcos epoch photometry
Two selection statistics are used to extract new candidate periodicvariables from the epoch photometry of the Hipparcos catalogue. Theprimary selection criterion is a signal-to-noise ratio. The dependenceof this statistic on the number of observations is calibrated usingabout 30000 randomly permuted Hipparcos data sets. A significance levelof 0.1 per cent is used to extract a first batch of candidate variables.The second criterion requires that the optimal frequency be unaffectedif the data are de-trended by low-order polynomials. We find 2675 newcandidate periodic variables, of which the majority (2082) are from theHipparcos`unsolved' variables. Potential problems with theinterpretation of the data (e.g. aliasing) are discussed.

Narrow-band photometry of late-type stars. II
This paper presents extensive narrow-band photometry in the Uppsalasystem supplementing earlier published mesurements so that data now areavailable for all late-type stars brighter than V = 6.05 and a number ofgalactic cluster members. Numerous UBV and BV measurements are alsopublished. The data are used to determine relations for the predictionof UBV intrinsic colors for late-type stars from the narrow-bandmeasurements. The main purpose of the data is to constitute the basisfor the determination of solar-neighborhood space densities of late-typestars, mainly giants of different kinds; these space densities will becombined with narrow-band data for fainter stars in the north Galacticpole region to yield the decrease of space density with distance fromthe galactic plane for many kinds of late-type stars.

Radial velocities of southern stars obtained with the photoelectric scanner CORAVEL. III - 790 late-type bright stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1985A&AS...59...15A&db_key=AST

DDO Observations of Southern Stars
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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Turna Kusu
Sað Açýklýk:23h03m59.50s
Yükselim:-41°28'42.0"
Görünürdeki Parlaklýk:5.79
Uzaklýk:92.251 parsek
özdevim Sað Açýklýk:13.1
özdevim Yükselim:55.9
B-T magnitude:7.169
V-T magnitude:5.915

Kataloglar ve belirtme:
Özgün isimleri
HD 1989HD 217842
TYCHO-2 2000TYC 8008-1099-1
USNO-A2.0USNO-A2 0450-40480619
BSC 1991HR 8771
HIPHIP 113902

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