Potentially hazardous object
Videos
A potentially hazardous object is a near-Earth object – either an asteroid or a comet – with an orbit that can make close approaches to the Earth and which is large enough to cause significant regiona
Radar image of the 350-meter PHO (308635) 2005 YU55
Pingualuit aerial 2007
Near-Earth object
Videos
A near-Earth object is by definition any small Solar System body orbiting the Sun whose closest approach to the Sun is less than 1.3 times the Earth–Sun distance. This definition applies to the object
Potentially hazardous object
…A potentially hazardous object (PHO) is a near-Earth object – either an asteroid or a comet – with an orbit that can make close approaches to the Earth and which is large enough to cause significant regional…
Eros PIA02923
The VLT images the very faint Near Earth Object 2009 FD
Comet Hartley 2