Inici     Començant     Sobreviure a l'Univers    
Inhabited Sky
    News@Sky     Astro Fotografia     La Col·lecció     Fòrum     Blog New!     FAQ     Premsa     Login  

HD 136899


Contingut

Imatges

Carregar la teva Imatge

DSS Images   Other Images


Articles Relacionats

New Estimates of the Solar-Neighborhood Massive Star Birthrate and the Galactic Supernova Rate
The birthrate of stars of masses >=10 Msolar is estimatedfrom a sample of just over 400 O3-B2 dwarfs within 1.5 kpc of the Sunand the result extrapolated to estimate the Galactic supernova ratecontributed by such stars. The solar-neighborhood Galactic-plane massivestar birthrate is estimated at ~176 stars kpc-3Myr-1. On the basis of a model in which the Galactic stellardensity distribution comprises a ``disk+central hole'' like that of thedust infrared emission (as proposed by Drimmel and Spergel), theGalactic supernova rate is estimated at probably not less than ~1 normore than ~2 per century and the number of O3-B2 dwarfs within the solarcircle at ~200,000.

Catalog of Galactic OB Stars
An all-sky catalog of Galactic OB stars has been created by extendingthe Case-Hamburg Galactic plane luminous-stars surveys to include 5500additional objects drawn from the literature. This work brings the totalnumber of known or reasonably suspected OB stars to over 16,000.Companion databases of UBVβ photometry and MK classifications forthese objects include nearly 30,000 and 20,000 entries, respectively.

Enviar un nou article


Enllaços Relacionats

  • - No s'ha trobat enllaços -
Enviar un nou enllaç


Membre dels grups següents:


Dades d'Observació i Astrometria

Constel·lació:Circinus
Ascensió Recta:15h25m45.02s
Declinació:-57°00'51.2"
Magnitud Aparent:7.466
Distancia:438.596 parsecs
Moviment propi RA:-10.5
Moviment propi Dec:-10.5
B-T magnitude:7.556
V-T magnitude:7.474

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 136899
TYCHO-2 2000TYC 8703-814-1
USNO-A2.0USNO-A2 0300-23636370
HIPHIP 75523

→ Sol·licitar més catàlegs i designacions de VizieR