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Mike Phillips
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Question about Saturn's ring inclination / tilt
      #5615627 - 01/10/13 02:21 PM

Does the ephem, "Planetocentric orbital longitude of the Sun" equal the tilt of the rings to earth?

Thanks!

Mike


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DesertRat
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Re: Question about Saturn's ring inclination / tilt new [Re: Mike Phillips]
      #5615984 - 01/10/13 06:13 PM

Not sure Mike, but I think a very close approximation would be what WinJupos calls "Declin. of Earth".

Glenn


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Centaur
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Reged: 07/12/04

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Re: Question about Saturn's ring inclination / tilt new [Re: Mike Phillips]
      #5616120 - 01/10/13 07:33 PM

Quote:

Does the ephem, "Planetocentric orbital longitude of the Sun" equal the tilt of the rings to earth?





Mike, the tilt of Saturnís ring plane from an earthbound observerís perspective is equivalent to what Jean Meeus in his book Astronomical Algorithms calls ďthe saturnicentric latitude of the Earth referred to the plane of the ringĒ. Several of my diagrams on my Saturn webpage relate to the ring tilt as described in Jeanís model: www.CurtRenz.com/saturn


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John Boudreau
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Re: Question about Saturn's ring inclination / tilt new [Re: DesertRat]
      #5618440 - 01/12/13 04:11 AM

Quote:

Not sure Mike, but I think a very close approximation would be what WinJupos calls "Declin. of Earth".

Glenn




I agree.

I ran across this JPL/NASA page about the ring crossing of the mid-90's:
http://www2.jpl.nasa.gov/saturn/angle.html

Checking those numbers against WinJupos, the Dec of Earth value matches --- the 1st value given that is by WinJupos; not the "B" value.


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