價格：免費
更新日期：2013-05-22
檔案大小：30.8 MB
目前版本：1.1
版本需求：需要 iOS 4.3 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
The NASA JPL Horizons On-Line Ephemeris System provides easy access to key solar system data and flexible production of highly accurate ephemerides for solar system objects. This includes 9 planets and the Sun.
Rise, transit and set may be identified to the nearest minute by the latitude, longitude and elevation of your device.
Output is suitable for observers, mission planners and other researchers, although this determination is ultimately the users' responsibility.
This application connects to NASA Horizons and show you updated high precise information about the Rise and Set of Solar System objects based on your Latitude, Longitude and Elevation using your device's GPS.
支援平台：iPhone, iPad