Principal     Comenzar     To Survive in the Universe    
Inhabited Sky
    News@Sky     Astrofotografía     La Colección     Foro     Blog New!     FAQ     Prensa     Login  

HD 128862 (PR Aps)


Contenidos

Imágenes

Subir su imagen

DSS Images   Other Images


Artículos relacionados

The 77th Name-List of Variable Stars
We present the next regular Name-List of variable stars containinginformation on 1152 variable stars recently designated in the system ofthe General Catalogue ofVariable Stars. New designations are alsointroduced for two ``old'' variables whose corrected coordinates bringthem to other constellations.

Two New Short Period Variables: HD 88278 and HD 128862
The results of short photometric runs on HD 88278 and HD 128862 arepresented. HD 88278 is probably monoperiodic, with a frequency of 15.72c/d. HD 128862 is multiperiodic, the most prominent variation having afrequency of about 6 c/d. Both stars are probably pulsators of the DeltaScuti class.

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

The chemical evolution of the solar neighborhood. I - A bias-free reduction technique and data sample
The possible ways of measuring the age-metallicity relation for thegalactic disk in the neighborhood of the sun are discussed. It is shownthat the use of a field star sample chosen on the basis of effectivetemperature introduces a bias which results in a monotonic increase inthe metal abundance of the disk with time. However, if theage-metallicity relation for the disk can be shown to satisfy certaincriteria, the bias introduced in such a sample can be neglected: thegalactic disk apparently satisfies the criteria. It is concluded that asample analyzed through the use of uvby and H(beta) photometry inconjunction with a self-consistent set of theoretical isochronesprovides the least biased, most accurate estimate of the age-metallicityrelation for the disk.

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.

Enviar un nuevo artículo


Enlaces relacionados

  • - No se han encontrado enlaces -
En viar un nuevo enlace


Miembro de los siguientes grupos:


Datos observacionales y astrométricos

Constelación:Ave del Paraíso
Ascensión Recta:14h44m17.21s
Declinación:-73°58'05.5"
Magnitud Aparente:8.038
Distancia:371.747 parsecs
Movimiento Propio en Ascensión Recta:-12.6
Movimiento Propio en Declinación:-18.8
B-T magnitude:8.449
V-T magnitude:8.072

Catálogos y designaciones:
Nombres PropiosPR Aps
  (Edit)
HD 1989HD 128862
TYCHO-2 2000TYC 9269-266-1
USNO-A2.0USNO-A2 0150-13845809
HIPHIP 72055

→ Solicitar más catálogos y designaciones a VizieR