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An extreme close up of two comets: 252P/LINEAR and P/2016 BA14

Michael Kelley 11
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Publicado el 19 mar. 2016

An animation showing the orbits of comets 252P/LINEAR and P/2016 BA14 as they flyby Earth in March 2016. At a closest approach distance of 3.5 million km, the faint BA14 is the closest comet known to flyby Earth in over 200 years. Comet LINEAR is only slightly farther away at 5 million km.

A few more details and the discovery of activity in BA14 are on my blog: http://www.astro.umd.edu/~msk/blog/ar...

Comentarios • 8

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johnny wright
johnny wrightHace 3 horas
what makes the two comets come together at the intersect point then drift apart to their original trajectory ?
1
Michael Kelley
Michael KelleyHace 2 horas
+johnny wright The inclinations of the two orbits are different by about 10 degrees. In other words, one of the orbits is slightly twisted with respect to the other. We suspect that these two comets are pieces of a larger comet that fragmented in the past. There are a few reasons the orbits are different now. Perhaps the smaller one got a bigger kick when the fragmentation happened years ago. Or, the planets, especially Jupiter, tug on each comet a little bit differently causing their orbits to change in different ways.
1
Harry Andruschak
Harry AndruschakHace 1 día
Thank you for this informative upload. I worked at JPL 1974-1986 :)
1
Joe Joey
Joe JoeyHace 1 día
Looks like they have already passed by? How bright are they? Can you see them with the naked eye or 7x binoculars?
1
Michael Kelley
Michael KelleyHace 1 día
The closest approaches will happen on the 21st and 22nd of March. If you are in the southern hemisphere and in dark skies you can try to find comet LINEAR. Comet BA14 is pretty faint. If you are in the north, there is a chance to see LINEAR about a week later. There is a chart at Sky & Telescope Magazine: http://www.skyandtelescope.com/observing/p2016-ba14-closest-comet-in-almost-250-years03162016/
1
Rudi Lapa
Rudi LapaHace 3 horas
Is there an online digital orrery like this for just normal viewing, e.g. - where the earth is in relation to the planets at this moment? And yes, at this scale, the rendezvous looks a little close for comfort...
1
Michael Kelley
Michael KelleyHace 2 horas
+Rudi Lapa Yes there is. Check out NASA's Solar System Simulator: http://space.jpl.nasa.gov/ . Select "Show me: The Solar System as seen from above" and pick "I want a field of view of 5 degrees" then "Run Simulator". There are a several options to play around with.
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Rudi Lapa
Rudi LapaHace 2 horas
AWESOME - Thank you!
1
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