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2014 Saturn's Retrograde Motion

2014 Saturn’s Retrograde Motion

   One of the ‘ringed planets’, Saturn, begins its retrograde Motion today. Retrograde motion is the apparent backward, or westward motion that a planet will appear to make at a regular point in its revolution around the Sun. We typically think of retrograde motion as being done by an outer planet from the Earth. This happens when the faster orbiting Earth catches up and passes by an outer planet. As this is happening the outer planet appears to slow down and then reverse its orbital direction toward the west. After a period of time (days to months) the outer planet again appears to slow down and then return to its regular eastward, or direct motion.
An inner planet orbit

An Inner Planet Orbit

   The two inner planets Mercury and Venus also undergo retrograde motion. Approximately one-half of their respective orbits is eastward as is with all the other planets. This then brings the inner planets to what is know as eastern elongation in the evening skies. The other half of the orbit for Mercury and Venus is toward the west as they move from eastern elongation through inferior conjunction toward western elongation in the morning skies.
3march   Saturn is currently located in the morning skies rising about an hour after midnight local time, but by the end of retrograde motion period Saturn will be rising before midnight during the mid-evening hours.
Click on the thumbnail image to see it full size.

Coordinate Positions for Saturn

 Date            RA	   Dec
		h  m	  d  m 
Feb  4  	15 20 	-16 15
Feb 14  	15 25 	-16 18
Feb 24  	15 26 	-16 19
Mar  6  	15 26 	-16 18
Mar 16  	15 25 	-16 14
Mar 26  	15 24 	-16 08
Apr  5  	15 22 	-15 59
Apr 15  	15 20 	-15 50
Apr 25  	15 17 	-15 39 
May  5  	15 14 	-15 27	
May 15  	15 11 	-15 16
May 25  	15 08 	-15 05
Jun  4  	15 06	-14 55
Jun 14  	15 03 	-14 47
Jun 24  	15 01 	-14 41
Jul  4  	15 00 	-14 37
Jul 14  	14 59 	-14 36
Jul 24  	14 59 	-14 38
Aug  3  	14 59 	-14 43
Aug 13 	 	15 00 	-14 50
Aug 23  	15 02 	-15 00

   This is few minutes from a 18 minute video of a solar system tour I developed to be accompanied by an original composition called ‘Orbit’ – written by Daniel Eichenbaum.

   
   
   
Caution: Objects viewed with an optical aid are further than they appear.
   Click here to go to the Qué tal in the Current Skies web site for more observing information for this month.

One thought on “nrutaS drawkcaB A

  1. Pingback: Jupiter Pulls A Reversal | Bob's Spaces

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