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HD 206805


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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.

The 74th Special Name-list of Variable Stars
We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.

Luminosity and motion of large proper motion stars. II - Stars with annual proper motion larger than 0.7 arc seconds
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1983ApJS...51..183E&db_key=AST

Catalogs of proper motion stars. II - Stars brighter than visual magnitude 15 and south of declination +30 deg with annual proper motion between 0.7 and 1.0 arcsec
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980ApJS...43..457E&db_key=AST

Dwarf K and M stars in the southern hemisphere.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972AJ.....77..486U&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Indiano
Ascensione retta:21h46m35.72s
Declinazione:-57°59'48.4"
Magnitudine apparente:8.962
Moto proprio RA:-10.8
Moto proprio Dec:-17.6
B-T magnitude:11.075
V-T magnitude:9.137

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 206805
TYCHO-2 2000TYC 8815-741-1
USNO-A2.0USNO-A2 0300-37351425
HIPHIP 107523
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