Partial solar eclipse in Hong Kong on June 21
11 June 2020
An annular solar eclipse, with the solar eclipse zone stretching across Asia and Africa, will occur on June 21 (Sunday), but it will be visible as a partial solar eclipse in Hong Kong. As the elevation of the sun will be rather high during the eclipse, the event can be best observed at places with an unobstructed view towards the west if weather permits.
The eclipse will begin at 2.37pm and end at 5.25pm, with the maximum eclipse occurring at 4.08pm. The path of the sun and the moon during this partial solar eclipse is indicated in the diagram below.
Details of this partial solar eclipse are set out in the following table:
|2.37pm||Eclipse begins||60 degrees||West
|4.08pm||Maximum eclipse||39 degrees||West-northwest
|5.25pm||Eclipse ends||22 degrees||West-northwest
During this solar eclipse, Hong Kong will be close to the path of annularity. The magnitude of the eclipse will be 0.89, meaning that 89 per cent of the sun's diameter will be obscured by the moon at maximum eclipse. This is the solar eclipse with the largest magnitude visible since 2012 and the solar eclipse with even larger magnitude will not occur until 2070.
Members of the public should never look directly at the sun with the naked eye nor through a telescope to avoid severe eye damage. A safer method is to project the sun's image through a pinhole or a telescope onto a piece of white paper or cardboard and view the projected image. An illustration of the method is given on the website of the Hong Kong Observatory.
Members of the public can watch the whole event via a webcast to be jointly provided by the Hong Kong Observatory, the Hong Kong Space Museum, the Ho Koon Nature Education cum Astronomical Centre (sponsored by Sik Sik Yuen), Po Leung Kuk Ngan Po Ling College and the Hong Kong Sheng Kung Hui Solar Tower‧Camp.
For the latest weather conditions and the astronomical observation conditions on June 21, please refer to the 9-day Weather Forecast issued by the Hong Kong Observatory and the Weather Information for Astronomical Observation webpage.
A detailed explanation of the technical terms used for different stages of the eclipse and the past solar eclipses observable in Hong Kong are also available at this Hong Kong Observatory's webpage.
The next solar eclipse visible in Hong Kong will be on April 20, 2023 which will only be barely observable.
Schematic diagram showing elevation and azimuth of the sun and the moon during the partial solar eclipse on June 21, 2020