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

HD 137643


Contenuti

Immagini

Carica la tua immagine

DSS Images   Other Images


Articoli relazionati

A photometric study of the Algol system TW Draconis
The reported study includes photoelectric observations of TW Dra with a40-cm reflector from observatories in Sicily and in West Germany. Thetotal number of observations include 422 observations on 147 nights inyellow and 381 observations on 141 nights in blue. The study had theobjective to obtain information for an investigation of certain openquestions regarding the Algol systems. Because of the presence of a gasstream, the rectification was performed as a short region rectification.In the obtained photometric solution, the systematic trends of theresiduals between observed and computed intensities are found to be evenlarger than the corresponding trends in the early solutions reported byBaglow (1952) and Horak (1966). These residuals can now be interpretedon the basis of the presence of a gas stream which transfers matter fromthe subgiant onto the bright massive component, where in the regions ofimpact of the particles hot spots are produced.

Sottometti un nuovo articolo


Link relazionati

  • - Nessun link trovato -
Sottometti un nuovo link


Membro dei seguenti gruppi:


Osservazione e dati astrometrici

Costellazione:Dragone
Ascensione retta:15h23m47.74s
Declinazione:+62°56'56.5"
Magnitudine apparente:8.218
Distanza:135.87 parsec
Moto proprio RA:-4.2
Moto proprio Dec:13.8
B-T magnitude:8.747
V-T magnitude:8.262

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 137643
TYCHO-2 2000TYC 4184-748-1
USNO-A2.0USNO-A2 1500-05917768
HIPHIP 75346

→ Richiesta di ulteriori cataloghi da VizieR