A partial lunar eclipse will occur in Hong Kong in the small hours of July 17 (Wednesday). As the elevation of the moon will be rather low during the eclipse, the event will be best observed at places with an unobstructed view to the southwest if weather permits.
The eclipse will begin at 2.42am with the maximum eclipse occurring at 5.31am. This partial lunar eclipse has an umbral magnitude of 0.66, meaning that 66 per cent of the moon’s diameter will enter into the umbra (total shadow) of the Earth at the time of the maximum eclipse. Details of the partial lunar eclipse are set out in the following table:
| Date | Time | Phenomenon | Elevation | Direction (Azimuth) |
| July 16 (Tuesday) |
6.47pm | Moonrise | -1 degree | East-southeast (114 degrees) |
| July 17 (Wednesday) | 2.42am | Moon enters penumbra | 34 degrees | Southwest (220 degrees) |
| 4.01am | Moon enters umbra | 21 degrees | Southwest (233 degrees) |
|
| 5.31am | Maximum eclipse | 4 degrees | West-southwest (244 degrees) |
|
| 5.49am | Sunrise | -1 degree | East-northeast (67 degrees) |
|
| 5.52am | Moonset | -1 degree | West-southwest (246 degrees) |
|
| 7.00am | Moon leaves umbra | Below the horizon | — | |
| 8.19am | Moon leaves penumbra | Below the horizon | — |
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-20190717.htm.
For the latest weather conditions and the astronomical observation conditions on July 17, please refer to the 9-day weather forecast issued by the Hong Kong Observatory (www.hko.gov.hk/wxinfo/currwx/fnd.htm) and 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 11, 2020. It will be a penumbral lunar eclipse.
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