Re-Entrant Totality
Is it possible for totality to be disrupted? The common understanding of total solar eclipses is that when the eclipse becomes total at second contact, it remains as […]
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A Prolonged Observation of the Outer Corona from Outside the Path of Totality
A remarkable observation The following post by Jillian Culver on the Solar Eclipse Chasers Facebook page caught our attention as it describes, rather in detail, an intriguing observation
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Experimentally Testing Eclipse Maps Accuracy
Several online sources provided eclipse maps for the 2024 April 8th total solar eclipse. All these maps show the location of the umbral shadow path limits. Close inspection
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Total solar eclipse hemisphere of visibility: an empirical “rule” and why it works
The “rule” The following empirical “rule” to determine the hemisphere of visibility of a total solar eclipse was recently mentioned on the Solar Eclipses Mailing List (SEML): To
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Technical Details of the true-limb Eclipse Path Determination
Technical Details of the true-limb Eclipse Path Determination Much interest has been generated by the precise map of the path of the 2024 April 8th Total Solar Eclipse
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Path of the 2024 April 8th Total Solar Eclipse
Path of the 2024 April 8th Total Solar Eclipse – by John Irwin The position of the umbral shadow path across North America has been accurately determined by
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Time span between totalities from a given place
The average time span between totalities from a given place is ca. 375 year, with a minimum just under 6 months and the longest and maximum of ca.
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Leap second, dUT1 and future eclipses
IERS has just announced that no leap second will be inserted into UTC at the end of December 2022 (https://datacenter.iers.org/data/latestVersion/16_BULLETIN_C16.txt). The number of inserted leap seconds (since the
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Leap Second: will there be one before the 2023 AT eclipse?
The Earth’s rotational rate is ever changing, due to a series of factors, mainly the effect of tidal friction caused by the Moon and the effect of the
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The solar radius and its impact on eclipse computations
Dependency on the value of the solar radius of eclipse duration (2017 August 21st total solar eclipse – from Vale, Oregon) The value of the solar radius at
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Timing of the Internal Contacts of the 2013 Nov 03 Total Solar Eclipse by Flash Spectrum Analysis
This article provides the description of an experimental technique to accurately time internal contacts, applied to the Total Solar Eclipse of Nov 3rd 2013.