Home     Baþlangýç     Evrende yaþayabilmek için    
Inhabited Sky
    News@Sky     Gökyüzü görüntüsü     Koleksiyon     Forum     Blog New!     SSS     Basýn     Giriþ  

HD 30001


Ýçindekiler

Görüntüler

Resim Yükleyin

DSS Images   Other Images


Ýlgili Makaleler

New periodic variables from the Hipparcos epoch photometry
Two selection statistics are used to extract new candidate periodicvariables from the epoch photometry of the Hipparcos catalogue. Theprimary selection criterion is a signal-to-noise ratio. The dependenceof this statistic on the number of observations is calibrated usingabout 30000 randomly permuted Hipparcos data sets. A significance levelof 0.1 per cent is used to extract a first batch of candidate variables.The second criterion requires that the optimal frequency be unaffectedif the data are de-trended by low-order polynomials. We find 2675 newcandidate periodic variables, of which the majority (2082) are from theHipparcos`unsolved' variables. Potential problems with theinterpretation of the data (e.g. aliasing) are discussed.

The 74th Special Name-list of Variable Stars
We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.

Yeni bir Makale Öner


Ýlgili Baðlantýlar

  • - Baðlantý Bulunamadý -
Yeni Bir Baðlantý Öner


sonraki gruplarýn üyesi:


Gözlemler ve gökölçümü verileri

Takýmyýldýz:Irmak
Sað Açýklýk:04h43m10.34s
Yükselim:-15°37'15.2"
Görünürdeki Parlaklýk:7.878
Uzaklýk:3125 parsek
özdevim Sað Açýklýk:28.3
özdevim Yükselim:-30
B-T magnitude:10.064
V-T magnitude:8.059

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 30001
TYCHO-2 2000TYC 5892-653-1
USNO-A2.0USNO-A2 0675-01676301
HIPHIP 21959

→ VizieR 'den daha fazla katalog ve tanýmlama isteyin