![ESA Operations on Twitter: "Wow. Asteroid 1998 OR2 tumbling through space seen by the Arecibo observatory. They confirm the space rock is ~ 2 km in diameter and rotates once every 4.1 ESA Operations on Twitter: "Wow. Asteroid 1998 OR2 tumbling through space seen by the Arecibo observatory. They confirm the space rock is ~ 2 km in diameter and rotates once every 4.1](https://pbs.twimg.com/tweet_video_thumb/EWRI-64WsAAtOuK.jpg)
ESA Operations on Twitter: "Wow. Asteroid 1998 OR2 tumbling through space seen by the Arecibo observatory. They confirm the space rock is ~ 2 km in diameter and rotates once every 4.1
![Huge asteroid to be visible over San Francisco this weekend | Museums and Galleries | sfexaminer.com Huge asteroid to be visible over San Francisco this weekend | Museums and Galleries | sfexaminer.com](https://bloximages.chicago2.vip.townnews.com/sfexaminer.com/content/tncms/assets/v3/editorial/e/cc/ecc96b18-ca66-11ed-ad0c-8768b466826f/641dda38d2f01.image.jpg?crop=692%2C363%2C0%2C96&resize=438%2C230&order=crop%2Cresize)
Huge asteroid to be visible over San Francisco this weekend | Museums and Galleries | sfexaminer.com
Augmentation of a Southern Hemisphere Deep Space Bistatic Radar with Small Optical Systems to Detect Near Earth and other Space
The next generation planetary radar system on the Green Bank Telescope Patrick A. Taylor National Radio Astronomy Observatory, G
Augmentation of a Southern Hemisphere Deep Space Bistatic Radar with Small Optical Systems to Detect Near Earth and other Space
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