The centers of Comet C/2013 A1 (Siding Spring) and Mars will approach each other by 132,153 km on 2014 OCT 19 at 13:45:07 CDT (18:45:08 U7), after light time for the images to reach Earth is taken into account. That’s about a third of the distance between the Earth and Moon. This is based on orbital data from Solex.
When the comet was discovered nearly two years ago, a collision with Mars was considered a possibility within the margin of error. Later observations provided evidence that a collision will not occur.
At the time the pair becomes closest spatially, the comet’s brightness is expected to be at magnitude +10.1. They will be near the Scorpius-Sagittarius border. Below are their predicted coordinates of date (not 2000.0) at the time of apparent closest spatial approach to each other according to Solex.
Mars
RA 17:38:26 Dec S 24°51’55”
Comet
RA 17:38:28 Dec S 24°50’26”
I’ve created three graphics for the event: An overhead view from north of the solar system, an equatorial chart and a comet ephemeris. They can be viewed at http://ift.tt/1y43jpI
Photos and descriptions of the event would be welcome additions to this thread.
When the comet was discovered nearly two years ago, a collision with Mars was considered a possibility within the margin of error. Later observations provided evidence that a collision will not occur.
At the time the pair becomes closest spatially, the comet’s brightness is expected to be at magnitude +10.1. They will be near the Scorpius-Sagittarius border. Below are their predicted coordinates of date (not 2000.0) at the time of apparent closest spatial approach to each other according to Solex.
Mars
RA 17:38:26 Dec S 24°51’55”
Comet
RA 17:38:28 Dec S 24°50’26”
I’ve created three graphics for the event: An overhead view from north of the solar system, an equatorial chart and a comet ephemeris. They can be viewed at http://ift.tt/1y43jpI
Photos and descriptions of the event would be welcome additions to this thread.
via International Skeptics Forum http://ift.tt/1FiKfsC
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