Hi! We are the Besselian Elements Team and you will find here information about calculations, incoming eclipses and our goal of measuring the solar radius using the flash spectrum.
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 …
The chromosphere, as seen in many eclipse images and video, appears intensely white in its lowermost layers and then has a characteristic purplish pink hue for most of …
Descriptions of total solar eclipses observed from the very edge of the path of totality are few and far between. So we would like to share our experience …
Total Eclipses from the edge: Coronality vs. Totality Read more »
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 …
Leap Second: will there be one before the 2023 AT eclipse? Read more »
We aim to measure the photospheric radius of the Sun by recording an accurately timestamped video of the eclipse flash spectrum. The simplest way to add timestamping to …
Solar eclipses come in various forms, when classified based on their appearance and evolution over the Earth’s surface. We have total eclipse, annular eclipses and partial eclipses. And …
The 2023 annular-total solar eclipse: a geographical and meteorological overview Read more »
We are probably all familiar with the spectrum of solar light. Its most spectacular natural manifestation is probably the rainbow. Small rain droplets from a distant storm illuminated …
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 …
The solar radius and its impact on eclipse computations Read more »
This article provides the description of an experimental technique to accurately time internal contacts, applied to the Total Solar Eclipse of Nov 3rd 2013.
