Jump to content


Photo

Question about Saturn's ring inclination / tilt

  • Please log in to reply
3 replies to this topic

#1 Mike Phillips

Mike Phillips

    Soyuz

  • *****
  • Posts: 3501
  • Joined: 21 Feb 2006
  • Loc: Swift Creek, NC - 35.682 N, 78.743°W

Posted 10 January 2013 - 02:21 PM

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

Thanks!

Mike

#2 DesertRat

DesertRat

    Fly Me to the Moon

  • *****
  • Posts: 5176
  • Joined: 18 Jun 2006
  • Loc: Valley of the Sun

Posted 10 January 2013 - 06:13 PM

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

Glenn

#3 Centaur

Centaur

    Vendor

  • *****
  • Vendors
  • Posts: 2554
  • Joined: 12 Jul 2004
  • Loc: Chicago

Posted 10 January 2013 - 07:33 PM

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


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

#4 John Boudreau

John Boudreau

    Viking 1

  • *****
  • Posts: 857
  • Joined: 06 Apr 2008
  • Loc: Saugus, MA

Posted 12 January 2013 - 04:11 AM

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...turn/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.






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics