首页     开始     To Survive in the Universe    
Inhabited Sky
    News@Sky     天文图片     收集     论坛     Blog New!     常见问题     新闻     登录  

HD 190521


目录

图像

上传图像

DSS Images   Other Images


相关文章

The Photometric Variability of Sun-like Stars: Observations and Results, 1984--1995
Using differential Stromgren b, y photometry, we monitored thebrightness variations of 41 program stars and their 73 comparison starsfrom 1984 through 1995. The predominantly main-sequence program starsspanned ranges of temperature and mean chromospheric activity centeredon solar values. About 40% of all the stars showed measurablevariability, typically at levels below 0.01 mag (~1%), on bothnight-to-night and year-to-year timescales. The variability correlatedwith mean chromospheric activity and advancing spectral type. We presentdifferential light curves and statistical descriptions of ourobservations.

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:天鷹座
右阿森松:20h05m10.88s
赤纬:+03°25'51.4"
视星:7.603
右阿森松适当运动:0.6
赤纬适当运动:4.6
B-T magnitude:9.08
V-T magnitude:7.725

目录:
适当名称   (Edit)
HD 1989HD 190521
TYCHO-2 2000TYC 498-15-1
USNO-A2.0USNO-A2 0900-17637242

→ 要求更多目录从vizier