20780 Chanyikhei is an asteroid which is located in our solar system, which orbits between Mars and Jupiter. The asteroid is discovered on Setember 1, 2000 in Lincoln Laboratory by the Near-Earth Asteroid Research Team. It is named after Chan Yik Hei (which is my friend!) from Hong Kong who achieved a Second Award in Engineering Category of the Intel International Science and Engineering Fair in 2004.
Above is an animation showing the movement of the asteroid. It shows that the asteroid moves to the down-right direction (which is southwest), which means that it is in a retrograde motion. Below is a graph showing the relative magnitude over phase of the asteroid:
As seen from the graph above, the asteroid has a big change in relative magnitude over phase of time. It suggest that the asteroid is rotating, and it has a 'potato' shape, where in the sharp side it reflects less light, and in the blunt side it reflects more light. The rotation period has not been observed previously, and it is a new discovery.
Wikipedia, 20780_Chanyikhei. http://en.wikipedia.org/wiki/20780_Chanyikhei.html
|Right Ascension (J2000)||04:05:23|
|Filters used||C (Clear)|
|Exposure time per filter||C (180s x 184)|
|Date observed||22 October, 2012, 24 October, 2012|