Home     Per cominciare     Sopravvivere Nell'Universo    
Inhabited Sky
    News@Sky     Astro Foto     La collezione     Forum     Blog New!     FAQ     Stampa     Login  

HD 197954


Contenuti

Immagini

Carica la tua immagine

DSS Images   Other Images


Articoli relazionati

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.

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

Final catalogue of 229 photometric standards in UBV system near the selected areas 1-115
Not Available

Photoelectric radial velocities. V. 69 southern HR stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972MNRAS.155..449G&db_key=AST

The corrected magnitudes and colours of 278 stars near S.A. 1-139 in the UBV system
Not Available

Sottometti un nuovo articolo


Link relazionati

  • - Nessun link trovato -
Sottometti un nuovo link


Membro dei seguenti gruppi:

Osservazione e dati astrometrici

Costellazione:Acquario
Ascensione retta:20h47m03.60s
Declinazione:-02°29'12.0"
Magnitudine apparente:6.27
Distanza:241.546 parsec
Moto proprio RA:-20.1
Moto proprio Dec:-20.8
B-T magnitude:8.358
V-T magnitude:6.452

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 197954
TYCHO-2 2000TYC 5182-2292-1
USNO-A2.0USNO-A2 0825-18705397
BSC 1991HR 7946
HIPHIP 102561
→ Richiesta di ulteriori cataloghi da VizieR