首页     To Survive in the Universe    
Services
    Why to Inhabit     Top Contributors     天文图片     收集     论坛     Blog New!     常见问题     登录  
→ Adopt this star  

HD 21220


目录

图像

上传图像

DSS Images   Other Images


相关文章

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.

提交文章


相关链接

  • - 没有找到链接 -
提交链接


下列团体成员


观测天体数据

星座:天爐座
右阿森松:03h24m23.51s
赤纬:-31°07'36.3"
视星:7.366
距离:68.306 天文距离
右阿森松适当运动:37.6
赤纬适当运动:118.4
B-T magnitude:8.488
V-T magnitude:7.459

目录:
适当名称
HD 1989HD 21220
TYCHO-2 2000TYC 7021-1025-1
USNO-A2.0USNO-A2 0525-01152006
HIPHIP 15866

→ 要求更多目录从vizier