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2 Bodies Appulse
#7
Steve,

The point of my table of appulses between Saturn and Iapetus in the first nine months of 2018 was...

(1) that ST3 will indeed generate the date and spacingĀ of each appulse (and the time, which I didn't tabulate)

(2) there are no appulses during the TSP.

As Greg noted, Iapetus has an approximate 80-day period, and the appulses I listed were roughly 5 weeks apart -- or roughly half the period Greg noted. For each revolution of Iapetus around Saturn, there are two appulses, one with Iapetus on either "side" of Saturn.

I suspect that you thinkĀ an appulse of Saturn and Iapetus will necessarily occur during the TSP, but that just isn't the case. If you limited your search period to the TSP dates, that's why none showed up.

As Greg also pointed out, you should just use SkyTools to find the position(s) of Iapetus during the available period(s) of observation at the TSP, and go with that.
Joe Stieber
http://sjastro.org/
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Messages In This Thread
2 Bodies Appulse - by SteveGoldberg - 2018-01-28, 08:42 PM
RE: 2 Bodies Appulse - by theskyhound - 2018-01-28, 09:04 PM
RE: 2 Bodies Appulse - by SteveGoldberg - 2018-01-28, 11:49 PM
RE: 2 Bodies Appulse - by theskyhound - 2018-01-29, 06:13 PM
RE: 2 Bodies Appulse - by SteveGoldberg - 2018-01-31, 01:40 AM
RE: 2 Bodies Appulse - by Joe Stieber - 2018-01-29, 05:38 PM
RE: 2 Bodies Appulse - by SteveGoldberg - 2018-01-30, 10:31 PM
RE: 2 Bodies Appulse - by Joe Stieber - 2018-01-30, 11:39 PM

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