Planets orbits question

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Planets orbits question

Postby ExoBawl » Wed Feb 27, 2019 10:56 pm

I think the word for this is apsis. I was just wondering if anyone knew a source where I could find when planets are out closer/closest points as searching for it just told me about mars in July last year
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Re: Planets orbits question

Postby Gfamily2 » Thu Feb 28, 2019 12:51 am

What sort of precision are you looking for?
In general terms, the Superior planets (those outside the Earth's orbit), are closest to the Earth in their orbit at Opposition, when they are 180degrees from the Sun, and the Inferior planets are closest at Inferior Conjunction, when they are lined up with the Sun.
You can get the dates for these on a year-by-year basis from the following site ... 19gmt.html (adjust the year following 'astrocal' as required).

If you want to get more exact details, turn to the individual ephermerides for the planets which are available further down this page

However, each opposition or conjunction will have different distances between the planet and the Earth, as all the planets (and the Earth itself) move in elliptical orbits so the relative positions of each varies each time.
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