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SATURN

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Saturn Apparition - Opposition 2013 APR 27-28

A plotting of the planet in equatorial coordinates of current date during 2012 NOV 15 to 2013 OCT 14 - See article below.

Saturn Declination - 2004-2032

A plotting of the declinations of the planet at oppositions from 2004 to 2032

Saturn Apparent Ring Tilt Graph - 2013

Graph of the tilt of Saturn’s rotational axis as viewed from Earth -  Identical tilt for the plane of Saturn’s rings

Rings of Saturn - 2013

Graphic illustrating the positioning of Saturn’s rings as viewed from Earth during 2012 DEC 28 to 2013 OCT 14

Rings of Saturn - 1995-2025

Graphic illustrating the positioning of Saturn’s rings as viewed from Earth during the 30 oppositions from 1995 to 2025

Rings of Saturn - Zero & Extreme Tilts

Graphic illustrating the positioning of Saturn’s rings as viewed from Earth at moments of zero and extreme tilts from 1980 to 2039

                                   2013 APPARITION OF SATURN

 

Generally since the Earth passed through Saturn’s ring plane in 2009, the tilt and view of the rings have been improving. However, Saturn’s declination has been dipping into the southern celestial hemisphere where it will remain until 2026.

 

    Saturn appeared to pass in conjunction behind the Sun on 2012 OCT 25. It reached western quadrature (90° from Sun) on 2013 JAN 30. Apparent retrograde motion commenced on FEB 19.

 

   Saturn’s greatest brilliance for this apparition at magnitude +0.1 is expected around 2013 APR 20. Opposition from the Sun will occur on APR 28 when it is also expected to make its closest approach to Earth for this apparition at 8.8162 AU with an equatorial angular diameter of 18.8 arcseconds. On that date the tilt of Saturn’s rings will be +18.1°, implying that its north pole is tipping toward Earth.

 

  Apparent direct motion for Saturn will resume on 2013 JUL 09 and eastern quadrature will be reached on JUL 28. Saturn will eventually move to conjunction behind the Sun on NOV 06.

 

  Saturn will appear in conjunction with Venus on 2013 SEP 18. It will appear in conjunction with Mercury on 2013 OCT 08.

 

   The Moon will appear to pass near Saturn on 2013 APR 26, MAY 23, JUN 19, JUL 16, AUG 13, SEP 09 & OCT 07.

 

NOTE: Events in this article are geocentric in Universal Time unless otherwise noted.

 

*  A meridian transit occurs when a celestial body crosses an observer’s local north-south line in the sky. That is practically simultaneous with culmination, i.e. the highest altitude for the day. The Saturn meridian transit times in the above linked graph can be easily transformed for your location. The given times are nearly the same for the central meridians of all time zones, i.e. those evenly divisible by 15° such as 75°, 90°, 105° or 120°. Do not adjust to UT. Simply add to the chart time 4 minutes for each degree west of a central meridian, or subtract 4 minutes for each degree to the east. If on daylight savings time, add an hour.

 

    © Curt Renz

 

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Saturn Stellar Magnitude - 2013

Graph of the brightness of Saturn measured in stellar magnitude

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Saturn Angular Diameter - 2013

Graph of the equatorial apparent angular diameter of Saturn measured in arcseconds  -  Distance in AU = 165.46 / angular diameter

Saturn Illumination Phase - 2013

Graph of the percentage of Saturn’s apparent disk illuminated

Saturn Meridian Transit Time* - 2013

Graph of the times that Saturn transits the prime meridian

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