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Oregon's 2017 August 21
Total Solar Eclipse
Oregon Connections Teacher Professional Development Webinar
8 & 9 May 2017
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 1 8 & 9 May 2017
http://www.vox.com/2015/3/19/8251157/solar-eclipse-how-to-watch
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 2 8 & 9 May 2017
If the Moon isn't close enough to Earth, its umbra won't reach us. An annular eclipse is seen.
http://www.forbes.com/sites/ethansiegel/2015/04/06/solar-eclipses-are-slowly-disappearing-and-
theres-nothing-we-can-do-to-stop-it/#26094ab57cfc
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 3 8 & 9 May 2017
Although the Willamette Valley last saw a total solar eclipse in 1979, these events usually fall
hundreds of years apart locally. The following circumstances are at Latitude 44° 50' 20" N,
Longitude 123° 05' 18" W, and Elevation 268 m.
Max. Eclipse Time Max. Eclipse
Altitude
Eclipse
Magnitude
Total Eclipse
Duration
1742-Jun-02 19:06:36 PDT +16° 1.057 2m 52s
1979-Feb-26 08:12:53 PST +12° 1.035 1m 07s
2017-Aug-21 10:18:07 PDT +40° 1.027 1m 59s
2618-May-16 06:27:27 PDT +06° 1.055 2m 31s
http://eclipse.gsfc.nasa.gov/JSEX/JSEX-NA.html
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 4 8 & 9 May 2017
WARNING: permanent blindness may result from looking directly at the Sun outside the Moon's
umbra. This photograph uses a protective filter.
http://www.hko.gov.hk/gts/graphics/astron-graphics/astro-photo201012.jpg
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 5 8 & 9 May 2017
Tree leaves act as "pinhole cameras" to form partial eclipse images for safe viewing.
http://imageimportant.faith/123databaseimages/solar+eclipse+through+trees
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 6 8 & 9 May 2017
Make your own pinhole camera for safe eclipse viewing.
http://addins.wvva.com/blogs/weather/2014/10/viewing-the-partial-solar-eclipse
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 7 8 & 9 May 2017
Focus binoculars on distant terrestrial object, then project Sun's image onto white paper for safe eclipse viewing (orient larger lenses toward Sun; eyepieces toward paper). CAUTION: excessive projection intervals will generate heat sufficient to damage binoculars.
http://www.stgeorgeutah.com/news/archive/2014/10/22/ams-partial-solar-eclipse-steals-afternoon-sky-safety-tips-viewing-locations-where-to-buy-glasses/#.V0I8DCjAVtI
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 8 8 & 9 May 2017
The Moon's umbra is cast across much of the Willamette Valley.
http://eclipsewise.com/solar/SEnews/TSE2017/TSE2017fig/TSE2017-01.jpg
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 9 8 & 9 May 2017
Just outside the Moon's umbra, "Baily's beads" and the Sun's pink chromosphere are seen.
http://www.terrastro.com/galleries/solar-eclipse/
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 10 8 & 9 May 2017
An awesome sight: the Sun's corona surrounds the Moon's silhouette during total eclipse.
http://www.eclipsetours.com/2001-and-earlier/1999-total-eclipse-in-turkey/
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 11 8 & 9 May 2017
During total eclipse, look for planets and bright stars as shown in this Celestia simulation. The sky will look very bright in every direction near the horizon, possibly appearing like a 360° sunset.
Celestia may be downloaded at http://www.shatters.net/celestia/ See a one-minute time-lapse video of this Celestia simulation at https://youtu.be/2jHASAyga_Q
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 12 8 & 9 May 2017
Solar Eclipse Computer
U.S. Naval Observatory Astronomical Applications Department
Solar Eclipse of 2017 Aug. 21
Sun in Total Eclipse at this Location
OSU Memorial Union Quadrangle (Longitude W123° 16' 44.1", Latitude N44° 33' 56.8", Height 78m)
August 21, 2017 Universal Time Delta T: 69.4s
Phenomenon Day Universal Time °Altitude °Azimuth °Position
Angle °Vertex
Angle Eclipse Begins 21 16:04:53.2 27.6 100.9 284.8 330.5 Totality Begins 21 17:16:51.7 39.7 116.3 138.2 179.0
Maximum Eclipse 21 17:17:42.6 39.8 116.5 Totality Ends 21 17:18:35.7 40.0 116.7 253.2 293.8 Eclipse Ends 21 18:37:21.0 51.0 139.4 106.8 135.1
Duration 2h 32m 27.8s Duration of Totality 1m 44.1s
Magnitude 1.006 Obscuration 100.0%
http://aa.usno.navy.mil/data/docs/Eclipse2017.php (input data into Form B)
Oregon's 2017 August 21 Total Solar Eclipse
Daniel R. Adamo ([email protected]) 13 8 & 9 May 2017
Solar Eclipse Computer Notes:
1) Universal Time is 7 hours ahead of Pacific Daylight Time (PDT). 2) The following diagrams approximate Sun/Moon geometry at Eclipse Begins.
