perihelium

Astronomers have in general acquiesced in the conjecture of Dr. Halley, that the comets of 1532, and 1661 are one and the same comet, from the similarity of the elements of their orbits, and were therefore induced to expect its return to its perihelium 1789.

The Botanic Garden A Poem in Two Parts. Part 1: the Economy of Vegetation Erasmus Darwin 1766

As this comet is liable to be disturbed in its ascent from the sun by the planets Jupiter and Saturn, Dr. Maskelyne expected its return to its perihelium in the beginning of the year 1789, or the latter end of the year 1788, and certainly sometime before the 27th of April, 1789, which prediction has not been fulfilled.

The Botanic Garden A Poem in Two Parts. Part 1: the Economy of Vegetation Erasmus Darwin 1766

In a two-body-problem, you can accurately predict the epoch of perihelium with a 5 seconds errors.

Conservapedia - Recent changes [en] Sunda62 2010

With these data, you can predict the time of perihelium for the next T years within an error of T miliseconds.

Conservapedia - Recent changes [en] Sunda62 2010

However, plugging in even just one other planet (say, Jupiter), the equations gain a chaotic behaviour, and you have no idea at all about the date of perihelium.

Conservapedia - Recent changes [en] Sunda62 2010

With these data, you can predict the time of perihelium for the next T years within an error of T miliseconds.

Conservapedia - Recent changes [en] Sunda62 2010

In a two-body-problem, you can accurately predict the epoch of perihelium with a 5 seconds errors.

Conservapedia - Recent changes [en] Sunda62 2010

However, plugging in even just one other planet (say, Jupiter), the equations gain a chaotic behaviour, and you have '' 'no' '' idea at all about the date of perihelium.

Conservapedia - Recent changes [en] Sunda62 2010

With these data, you can predict the time of perihelium for the next T years within an error of T miliseconds.

Conservapedia - Recent changes [en] Sunda62 2010

In a two-body-problem, you can accurately predict the dateo f perihelium with a 5 seconds errors.

Conservapedia - Recent changes [en] Sunda62 2010