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

HD 199784


Contenuti

Immagini

Carica la tua immagine

DSS Images   Other Images


Articoli relazionati

Estimation of spectral classifications for bright northern stars with interesting Stromgren indices
The purpose of this investigation is to provide spectroscopic observerswith finding lists of potentially interesting objects. From anunpublished UVBY catalogue of 7026 northern stars (mostly brighter than8.3m) 1094 objects with interesting combinations of UVBY indices havebeen selected. Most stars with post-HD classifications have beenexcluded, as well as late F dwarfs belonging to the intermediatepopulation II. For the 792 remaining stars estimated spectralclassifications are given. The techniques and experience from a previouspaper dealing with southern stars have been utilized here. Among thepredicted spectral classifications are 40 OB stars; 262 Ap, Am, or Fmstars; 16 supergiants of types A to G; 110 bright giants of types A to K(class II); 156 double stars or objects with composite spectra; 26 lateF dwarfs; 91 weak-lined dwarf and giant stars of types F to K, includingearly F-type population II field blue stragglers; and a few possiblefield horizontal branch stars, lambda Bootis-type stars, and late-typehalo giants.

Positions et Mouvements propres de 357 Etoiles de Repère de la Zone + 16° à + 18° pour l'époque et l'équinoxe 1950,0
Not Available

Sottometti un nuovo articolo


Link relazionati

  • - Nessun link trovato -
Sottometti un nuovo link


Membro dei seguenti gruppi:


Osservazione e dati astrometrici

Costellazione:Delfino
Ascensione retta:20h58m52.59s
Declinazione:+17°52'01.8"
Magnitudine apparente:7.954
Distanza:191.939 parsec
Moto proprio RA:2.6
Moto proprio Dec:-0.3
B-T magnitude:8.279
V-T magnitude:7.981

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 199784
TYCHO-2 2000TYC 1652-1136-1
USNO-A2.0USNO-A2 1050-18991088
HIPHIP 103556

→ Richiesta di ulteriori cataloghi da VizieR