Rrrn r i i i i i i i i i i i i i Fraternit Egalit Libert

1500

250 260 270 280 290 PRECESSED LONGITUDE (DEGREES)

1500

250 260 270 280 290 PRECESSED LONGITUDE (DEGREES)

Figure 8.2. In a wide-angle image obtained 20.5 hr after Voyager 2's closest approach to Neptune, all the Adams ring arcs were captured. A radially averaged azimuthal scan of the Adams ring depicts the relative sizes and positions of the five ring arcs. The longitude system is one for which the rings are fixed as of August 18, 1989. Adjustment to that date was accomplished by precession of the observed position backwards at a rate of 820.1185deg/day, the observed rotational rate of the A ring arcs. The three asterisks in the figure indicate the positions of background stars. The "r" in the Fraternite arc shows the position of an incompletely removed black reseau mark from the camera; reseau marks are used for geometric reconstruction of Voyager images.

Was this article helpful?

0 0
Telescopes Mastery

Telescopes Mastery

Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!

Get My Free Ebook


Post a comment