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  

TYC 4421-1783-1


目录

图像

上传图像

DSS Images   Other Images


相关文章

Passive and active SETI strategies using the synchronization of SN1987A
A passive and active strategy for the reception and transmission of callsignals, from and to other possible extraterrestrial civilizations issuggested using the explosion of SN1987A. The reception area is anellipsoid with the Earth and the supernova in its focuses, in thedirection of SN1987A. Three hundred and forty objects have beenidentified inside this surface and four of them are stars withenvironments similar to our sun (e.g. necessary for the development oflife and intelligence). A search strategy to look for 'fake' pulsarssignals, originated in other possible technological civilizations, inthis direction, is examined. The active strategy consists in thetransmission of terrestrial signals towards the hyperboloid surface(with the same focuses) in the antipodal direction of the supernovaexplosion. Thirty-three objects have been identified inside thehyperboloid and three of them are solar-type nearby stars. Thetransmission characteristics of a terrestrial origin 'fake' pulsar (e.g.modulation, frequency, bandwidth, periods, duty cycle, etc.) arediscussed in some detail. The possible use of available planetary radarsto develop such a proposal and the criterion of artificiarity, withoutany implicit code or semantics is reviewed. A difference between activesearch and communication is established.

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:天龍座
右阿森松:17h35m20.82s
赤纬:+69°38'01.3"
视星:8.649
距离:1265.823 天文距离
右阿森松适当运动:12.1
赤纬适当运动:-10.6
B-T magnitude:10.352
V-T magnitude:8.79

目录:
适当名称   (Edit)
TYCHO-2 2000TYC 4421-1783-1
USNO-A2.0USNO-A2 1575-03825377
HIPHIP 86066

→ 要求更多目录从vizier