Hubble images show comet siding spring has passed the snow and water lines the points at which the sun s warmth activates or releases gases and water ice to form the coma and tail.
Comet siding spring buzzes mars.
25 700 mi from the center of mars.
Comet siding spring s dust tail will completely engulf the entire planet when mars travels through it.
19 comet c 2013 a1 comet siding spring will pass within about 87 000 miles 139 500 km of mars.
Comet siding spring will approach within 86 000 miles 138 000 kilometers of mars on oct.
By kiona smith strickland jul 30 2014.
Initial observations by leonid elenin on 27 february 2013 suggested that it might pass 0 000276 au 41 300 km.
Nasa s extensive fleet of science assets particularly those orbiting and roving mars have front row seats to image and study this once in a lifetime flyby.
19 potentially putting on a good show for nasa s red planet spacecraft.
Comet siding spring s mars buzz animated take a close look at how comet siding spring will make its historic flyby of mars on oct.
86 500 mi from the center point of mars and the uncertainty region shows.
On that date comet 2013 a1 siding spring will buzz mars about 10 times closer than any identified comet has ever flown past earth.
In october comet siding spring will buzz mars at 125 000 miles per hour and close enough for the comet s tail of gas and dust to envelop the planet.
The comet siding spring whizzed within 87 000 miles of mars close enough for nasa to force its fleet of spacecraft orbiting mars to duck for cover.
Comet siding spring s close encounter with the fleet of orbiters and rovers at mars is expected to give scientists their most detailed look yet at an object from the oort cloud.
Spacecraft at mars might get a good look at the nucleus of comet.
Comet siding spring passed extremely close to mars on 19 october 2014 at 18 28 0 01 utc.