On that date the comet passed by mars at approximately 87 000 miles about one third the distance between earth and the moon.
Comet siding spring view from mars.
This composite hubble space telescope image captures the positions of comet siding spring and mars in a never before seen close passage of a comet by the red planet which happened at 2 28 p m.
Edt october 19 2014.
Several other nasa instruments on mars and in space also imaged comet siding spring s mars flyby.
Comet siding spring flew about 87 000 miles from mars during the encounter.
Edt hurtling at about 126 000 mph 56 kilometers per second.
In the still image comet siding spring is visible as a faint smear just above and to the right of the brightest streak.
Siding spring s nucleus will come closest to mars around 11 27 a m.
Nasa s hubble space telescope has produced a unique composite image of comet siding spring as it made its never before seen close passage of a comet by mars.
19 comet c 2013 a1 also known as comet siding spring will pass within about 87 000 miles 139 500 kilometers of the red planet less than half the distance between earth and our moon and less than one tenth the distance of any known comet flyby of earth.