Other
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934706b&link_type=abstract
American Astronomical Society, AAS Meeting #219, #347.06
Other
Scientific paper
On August 21, 2017, most of the United States will experience a partial solar eclipse with a total solar eclipse visible from a narrow band, approximately 73 mi (118 km) wide, crossing twelve states. The Shawnee National Forest, Illinois falls within this favored region but Austin, Texas does not. While both locations lie along the April 8, 2024, path of totality, the Forest is still better positioned.
On average, three solar eclipse tracks race across the globe every two years; in rare years, as many as five solar eclipses, including partial ones, can occur. Because each individual track covers less than 1% of the Earth's surface, an average of 375 years lapse between total solar eclipses at a particular site.
In 2017, the longest duration of totality for the eclipse will darken the Shawnee National Forest (37°34.5’ N, 89°7.3’ W) for 2 min. 44 sec. In 2024, totality will last 4 min. 13 sec. over the Forest. Although July 7, 1442, was the last total solar eclipse here, an annular solar eclipse was visible in 1865.
In 2017, Austin will only experience a partial eclipse with 65% of the Sun obscured. In 2024, totality will darken the state capital for 1 min. 48 sec. The last total solar eclipse here occurred on May 26, 1397, which was immediately preceded by another on January 21, 1395. More recently, two annular solar eclipses were visible during the 20th century.
The August and April weather at both sites is generally favorable; while clouds and rain are possible, neither is a significant threat.
What your outreach program will see and do during these eclipses depends heavily on where you are, or can go. For those impatiently awaiting their next eclipse fix, a partially eclipsed sun will set over both sites on May 20, 2012.
Bartlett Jennifer L.
Bell Steve
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