Home     Sopravvivere Nell'Universo    
Services
    Perché adottare     Donatori     Astro Foto     La collezione     Forum     Blog New!     FAQ     Login  
→ Adopt this star  

HD 179491


Contenuti

Immagini

Carica la tua immagine

DSS Images   Other Images


Articoli relazionati

Stroemgren photometry of F- and G-type stars brighter than V = 9.6. I. UVBY photometry
Within the framework of a large photometric observing program, designedto investigate the Galaxy's structure and evolution, Hβ photometryis being made for about 9000 stars. As a by-product, supplementary uvbyphotometry has been made. The results are presented in a cataloguecontaining 6924 uvby observations of 6190 stars, all south ofδ=+38deg. The overall internal rms errors of one observation(transformed to the standard system) of a program star in the interval6.5

Estimation of spectral classifications for bright southern stars with interesting Stromgren indices
This paper investigates the degree of success with which uvby photometrycan be applied to predict spectral classifications for 947 A, F, and Gstars brighter than an apparent magnitude of 8.3 and with four-colorindices indicating some kind of interesting, unusual, or peculiarspectrum. One or several possible spectral classifications are estimatedfor each star from photometry alone, double stars are distinguished, andthe estimates are compared with published classifications. The resultsshow that the framework provided by uvby photometry can be extended toinclude most G and K stars, reddened stars, peculiar stars, and certaintypes of double star.

Sottometti un nuovo articolo


Link relazionati

  • - Nessun link trovato -
Sottometti un nuovo link


Membro dei seguenti gruppi:


Osservazione e dati astrometrici

Costellazione:Aquila
Ascensione retta:19h12m37.00s
Declinazione:+06°02'22.2"
Magnitudine apparente:7.467
Distanza:218.341 parsec
Moto proprio RA:-1.8
Moto proprio Dec:-16.1
B-T magnitude:8.239
V-T magnitude:7.531

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 179491
TYCHO-2 2000TYC 475-1571-1
USNO-A2.0USNO-A2 0900-14184261
HIPHIP 94383

→ Richiesta di ulteriori cataloghi da VizieR