
Tuesday, August 22, 2017
Finding the Great American Eclipse in North Carolina

Sunday, August 20, 2017
Should You Trust Climate Science? Maybe the Eclipse Is a Clue
In an article in the NY Times with this title, Justin Gills points out:
Thanks to the work of scientists, people will know exactly what time to expect the eclipse (see Mattox's previous post). In less entertaining but more important ways, we respond to scientific predictions all the time, even though we have no independent capacity to verify the calculations. We tend to trust scientists.
For years now, atmospheric scientists have been handing us a set of predictions about the likely consequences of our emissions of industrial gases. These forecasts are critically important, because this group of experts sees grave risks to our civilization. And yet, when it comes to reacting to the warnings of climate science, we have done little.
Indeed! Wake up folks. Climate change is a real threat, and we must take action very soon.
Chasing the Great American Eclipse in North Carolina
Chasing the Great American Eclipse in
North Carolina
John
R. Mattox, University of North Carolina System Professor
The Great American
Eclipse will encompass America on August
21, 2017, featuring at least a partial eclipse for the entire United States –
where the Moon temporarily covers at least a fraction of the Sun’s bright
photosphere.
Within
a ~70 mile wide “path of total eclipse”, a total eclipse of the Sun can be
observed for up to 2 minutes and 40 seconds on 8/21/17, when the Moon covers
all of the Sun’s bright photosphere, creating a unique and dramatic viewing opportunity
– see this description of the
splendor of totality.
The
disk of totality comes ashore in Oregon at 10:16 am pdt, travels in a
southeasterly direction across the entire USA at an average of 1700 MPH, a
supersonic velocity, going offshore 93 minutes later in South Carolina at 2:49
pm edt, touching a dozen states along the way: Oregon, Idaho, Wyoming,
Nebraska, Kansas, Missouri, Illinois, Kentucky, Tennessee, Georgia, North
Carolina, and South Carolina. Although a total eclipse is safe to observe with
your naked eyes, you need eye protection to observe up until the moment that
totality begins, and you need eye protection (e.g., eclipse shades) to observe
after the moment that totality ends. If you are not in the path of total eclipse,
you need continuous eye protection to observe. During
THE PARTIAL STAGES OF THE ECLIPSE (when the bright photosphere of the sun is
partially visible) YOU MUST HAVE PROPER EYE PROTECTION to avoid permanent EYE
Injury.
Suggestions
for Eclipse Chasers
There are millions of
us out here, chasing the Great American Eclipse. So it is a good idea to be
strategic about where you go! Here is an interactive map showing the path of total eclipse and
providing eclipse details for any location you click on (the time given there is UT – subtract 4 hours for
EDT). And here is a very useful article: Predicting eclipse visitation with population
statistics: https://www.greatamericaneclipse.com/statistics/, that can help you to get a handle on potential problems with traffic
congestion.
The potential total eclipse observing site that I was
recommending until I came across this analysis was the Santee Indian Mound. It
is just west of I-95 at the north end of the Lake Marion (exit 102). There is probably
public access to the top of this ancient ceremonial Indian Mound - I was last
there 5 years ago. It is nearly at the center of the band of totality. However, the article referenced above
indicates that where I-95 crosses the totality-band, is the nearest Totality
viewing site for 74.6 million Americans. I expect it may still be a great place
to be for viewing Totality, but I suggest you plan to arrive not later than
midnight, 8/20/17, and have food and water for 24 hours.
Here is the prediction from the resource provided
above for the Indian Mound:
Lat.: 33.5331° N
Long.: 80.4287° W |
Duration of Totality: 2m35.1s
Magnitude: 1.015 Obscuration: 100.00% |
Event
|
Date
|
Time (UT)
|
Alt
|
Azi
|
Start of partial eclipse
(C1) :
|
2017/08/21
|
17:15:00.0
|
68.2°
|
173.6°
|
Start of total eclipse
(C2) :
|
2017/08/21
|
18:43:43.5
|
61.8°
|
224.4°
|
Maximum eclipse :
|
2017/08/21
|
18:45:01.2
|
61.6°
|
224.9°
|
End of total eclipse
(C3) :
|
2017/08/21
|
18:46:18.6
|
61.4°
|
225.5°
|
End of partial eclipse
(C4) :
|
2017/08/21
|
20:08:00.3
|
46.9°
|
249.6°
|
I’m going to
be in the Mountains near Highland, NC. I’m not going to give details here, but I
will provide the prediction from the
resource provided above:
Lat.: 35.03° N
Long.: 83.2571° W |
Duration of Totality: 2m35.9s
Magnitude: 1.013 Obscuration: 100.00% |
Event
|
Date
|
Time (UT)
|
Alt
|
Azi
|
Start of partial eclipse
(C1) :
|
2017/08/21
|
17:07:09.1
|
65.9°
|
162.4°
|
Start of total eclipse
(C2) :
|
2017/08/21
|
18:35:51.4
|
63.1°
|
214.0°
|
Maximum eclipse :
|
2017/08/21
|
18:37:09.5
|
63.0°
|
214.6°
|
End of total eclipse
(C3) :
|
2017/08/21
|
18:38:27.3
|
62.8°
|
215.2°
|
End of partial eclipse
(C4) :
|
2017/08/21
|
20:01:23.0
|
49.8°
|
243.9°
|
a public viewing of partial eclipse will occur from 2:15 – 3:15
pm, on 8/21/17 in the large open space adjacent to the Planetarium (North of
the Lyons Science Building). Maximum partial eclipse (95%) will
occur at 2:45. Eclipse glasses will be provided to the extent that supply
allows. In addition, three solar safe telescopes will be used to observe
the Sun during the eclipse. For more information about this event, contact the
FSU Planetarium Manager, Joe Kabbes.
Good luck!
John Mattox
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