Partial lunar eclipse in Hong Kong on August 7 and 8
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The eclipse will begin at 11.48pm on August 7 and end at 4.53am the next morning, with the maximum eclipse occurring at 2.21am. This partial lunar eclipse has an umbral magnitude of 0.25, meaning that 25 per cent of the moon's diameter will enter into the umbra (total shadow) of the Earth at the maximum eclipse. Details of the partial lunar eclipse are set out in the following table:
| Date | Time | Phenomenon | Elevation | Direction (Azimuth) |
| August 7 (Monday) | 6.41pm | Moonrise | -1 degree | East-southeast (108 degrees) |
| 11.48pm | Moon enters penumbra | 51 degrees | South-southeast (166 degrees) | |
| August 8 (Tuesday) |
1.22am | Moon enters umbra | 49 degrees | South-southwest (201 degrees) |
| 2.21am | Maximum eclipse | 43 degrees | Southwest (219 degrees) | |
| 3.19am | Moon leaves umbra | 33 degrees | Southwest (231 degrees) | |
| 4.53am | Moon leaves penumbra | 15 degrees | West-southwest (246 degrees) |
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, the Po Leung Kuk Ngan Po Ling College and the Hong Kong Sheng Kung Hui Solar Tower‧Camp on the following webpage: www.hko.gov.hk/gts/event/webcast-20170807.htm.
For the weather on August 7 and 8, please refer to the latest nine-day Weather Forecast issued by the Observatory at the following webpage:
www.hko.gov.hk/wxinfo/currwx/fnd.htm.
As regards the astronomical observation conditions for that night, please refer to the "Weather Information for Astronomical Observation" webpage:
www.hko.gov.hk/gts/astronomy/astro_portal.html.
The next lunar eclipse observable in Hong Kong will occur on January 31, 2018. It will be a total lunar eclipse.
Ends/Monday, July 31, 2017
Issued at HKT 16:00
Issued at HKT 16:00
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