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

HD 180940


Contenidos

Imágenes

Subir su imagen

DSS Images   Other Images


Artículos relacionados

Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue.
We give a common version of the two catalogues of Mean Radial Velocitiesby Wilson (1963) and Evans (1978) to which we have added the catalogueof spectroscopic binary systems (Batten et al. 1989). For each star,when possible, we give: 1) an acronym to enter SIMBAD (Set ofIdentifications Measurements and Bibliography for Astronomical Data) ofthe CDS (Centre de Donnees Astronomiques de Strasbourg). 2) the numberHIC of the HIPPARCOS catalogue (Turon 1992). 3) the CCDM number(Catalogue des Composantes des etoiles Doubles et Multiples) byDommanget & Nys (1994). For the cluster stars, a precise study hasbeen done, on the identificator numbers. Numerous remarks point out theproblems we have had to deal with.

Young stellar objects detected by IRAS
Fluxes of 453 IRAS point sources selected for proximity to dense gashave been accurately determined by co-adding IRAS data. From this set,258 sources are detected in all four bands: 12, 25, 60, and 100 microns.As distance from dense molecular material increases, these sourcesexhibit systematic trends in color and a markedly decreasing luminosity.These trends are broadly consistent with expected evolutionary changesin these stars, with younger objects found closer to dense gas. Thesedata suggest a subtle variation on the criterion for identifying theyoungest objects detectable by IRAS, in addition to that of steeplyrising spectra: a color temperature which is uniform across all fourIRAS bands in the range 40-50 K. These characteristics are used as acriterion to select point sources as candidate very youngpre-main-sequence stars.

Classification of Composite Spectra.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1961ApJ...134..222S&db_key=AST

Radial Velocities, Spectral Types, and Luminosity Classes of 820 Stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1950ApJ...112...48M&db_key=AST

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:Flecha
Ascensión Recta:19h17m49.92s
Declinación:+18°50'55.0"
Magnitud Aparente:7.69
Distancia:1587.302 parsecs
Movimiento Propio en Ascensión Recta:0.6
Movimiento Propio en Declinación:-5
B-T magnitude:9.524
V-T magnitude:7.842

Catálogos y designaciones:
Nombres Propios   (Edit)
HD 1989HD 180940
TYCHO-2 2000TYC 1607-1171-1
USNO-A2.0USNO-A2 1050-13581260
HIPHIP 94837

→ Solicitar más catálogos y designaciones a VizieR