1. Getting Ready for 2017
Dr. Carl J. Wenning

2. Waiting for Godot?

3. The Wait is Almost Over! Total Solar Eclipse 2017 Annular Eclipse 2023

4. Personal Impressions

5. Total Eclipse August 21, 2017

6. 2017 Ground Track 1

7. 2017 Ground Track 2

8. Annular Eclipse October 14, 2023

9. 2023 Ground Track

10. Total Eclipse of April 8, 2024

11. 2024 Ground Track

12. The Moon’s Shadow

13. Motion of Umbral Shadow

14. Circumstances of 2017 Eclipse
Eclipse magnitude =
Greatest duration is 2 minutes 40.2 seconds
Longest duration occurs in Shawnee National Forest just south of Carbondale, IL
Path of totality 115km wide (70 miles)

15. Cloud Predictions for S. Illinois
Clear 27.9%
Few 29.9%
Scattered 5.7%
Broken 24.9%
Overcast 11.4%
Be prepared to move!

16. Events at Greatest Eclipse Point
(P1) Partial phase begins ~ 11:55 AM CDT
(U1) Totality begins ~ 1:24 PM CDT
(U4) Totality ends ~ 1:26 PM CDT
(P4) Partial phase ends ~ 2:51 PM CDT
Events occur earlier to the west and later to the east as the lunar umbra sweeps from west to east across Earth.

17. Things to Observe 1
Bailey beads
Diamond ring
Shadow bands

18. Things to Observe 2
Solar corona
Prominences

19. Things to Observe 3 Venus (mag -4.0) Jupiter (mag -1.8)
Mars (mag +1.8)
Mercury (mag +3.3)

20. Things to Observe 4

21. Things to Observe 5 People (they tend to go “crazy”) Animals:
Birds go to roost
Evening insects being to chirp
Cows return from the fields
Light levels drop (use fixed exposure camera)
Weather phenomena:
Air temperature drops
Clouds can begin to form in place

22. During Totality
Consider this: Do you really want to photograph the main event?
Set up a video camera on yourself and let it run during totality so you can relive the wild and crazy moments!

23. How do I photograph it?
You will need at LEAST a 300+ mm mounted lens. (Test it out on the full moon - which is about the same size as the sun - to see what the scale of your results will be.)
Charge up everything and replace batteries the night before.
Use filters before and after totality, and don’t forget to remove filters during totality!
Use workshop and online resources for learning and then practice, practice, practice.

24. Visual Safety!

25. Telescope Safety

26. Join us for our next POS! ORION AND COMPANY Saturday, March 25th
7:00 – 9:00 PM
Sugar Grove Nature Center
Tim Stone, speaker
Orion is a prominent constellation located on the celestial equator and visible throughout the world. It is one of the most conspicuous and recognizable constellations in the night sky.