Hi! We are the Besselian Elements Team and you will find here information about calculations, upcoming eclipses and our goal of measuring the solar radius using the flash spectrum.
Capturing the flash spectrum during a solar eclipse offers invaluable insights into the Sun’s outer layers like the chromosphere and the mesosphere. To harness this data, it is […]
Flash Spectrum video analysis with Python Read more »
Capturing the flash spectrum during a solar eclipse, with not professional equipment, is as challenging as it is rewarding. To help you get the best results, we’ve compiled a guide based on
Flash Spectrum Recording Guidelines Read more »
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
A Prolonged Observation of the Outer Corona from Outside the Path of Totality Read more »
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
Experimentally Testing Eclipse Maps Accuracy Read more »
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
Total solar eclipse hemisphere of visibility: an empirical “rule” and why it works Read more »
Many observers in Northern Texas, and elsewhere, reported that cloud cover decreased on the lead up to totality during the recent total solar eclipse. Some places started with
Effect of Eclipse Cooling on Clouds: a demostration Read more »
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
Technical Details of the true-limb Eclipse Path Determination Read more »
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
Path of the 2024 April 8th Total Solar Eclipse Read more »
The naked eye view of the eclipse from at the limit of the umbral shadow
Eclipse from the edge Read more »
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.
Time span between totalities from a given place Read more »
Flash spectrum videos have been successfully used to estimate the solar radius JOA2022_2.pdf (iota-es.de) and the same methodology offers the possibility to probe the distribution of elements in the chromosphere. During
Elements distribution in the chromosphere from a flash spectrum video Read more »
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
Leap second, dUT1 and future eclipses Read more »
