Almanac · Eclipses

Penumbral lunar eclipse, 18 Jul 2027

The Moon passes only through the Earth’s faint outer shadow: it dims, and a dimming this slight is easy to miss. Greatest eclipse is on Sun 18 Jul 2027 at 16:03 UTC.

• Greatest eclipse Sun 18 Jul 2027, 16:03 UTC The Moon overhead at 22.3°S 121.2°E
• Magnitude -1.068 Umbral; penumbral 0.002
• Longest Penumbral 13m The same from everywhere the Moon is up

City by city

An eclipse of the Moon is the same sight from everywhere the Moon is up. The biggest cities on our list that see all of it, spread round that side of the world, the Moon highest first, then some that see part. Every time is the city’s own clock.

• Broome, Australia All of it, the Moon 85° up at greatest eclipse Begins 23:56 · Deepest 00:03 · Ends 00:09 GMT+8 Watch from here
• Jakarta, Indonesia All of it, the Moon 68° up at greatest eclipse Begins 22:56 · Deepest 23:03 · Ends 23:09 GMT+7 Watch from here
• Bangkok, Thailand All of it, the Moon 48° up at greatest eclipse Begins 22:56 · Deepest 23:03 · Ends 23:09 GMT+7 Watch from here
• Shanghai, China All of it, the Moon 36° up at greatest eclipse Begins 23:56 · Deepest 00:03 · Ends 00:09 GMT+8 Watch from here
• Dhaka, Bangladesh All of it, the Moon 34° up at greatest eclipse Begins 21:56 · Deepest 22:03 · Ends 22:09 GMT+6 Watch from here
• Chengdu, China All of it, the Moon 34° up at greatest eclipse Begins 23:56 · Deepest 00:03 · Ends 00:09 GMT+8 Watch from here
• Tokyo, Japan All of it, the Moon 29° up at greatest eclipse Begins 00:56 · Deepest 01:03 · Ends 01:09 GMT+9 Watch from here
• Mumbai, India All of it, the Moon 26° up at greatest eclipse Begins 21:26 · Deepest 21:33 · Ends 21:39 GMT+5:30 Watch from here
• Harbin, China All of it, the Moon 21° up at greatest eclipse Begins 23:56 · Deepest 00:03 · Ends 00:09 GMT+8 Watch from here
• Basra, Iraq Part of it: the Moon rises during it Begins before moonrise · Deepest 19:03 · Ends 19:09 GMT+3 Watch from here
• Lubumbashi, DR Congo Part of it: the Moon rises during it Begins before moonrise · Deepest 18:03 · Ends 18:09 GMT+2 Watch from here
• Asmara, Eritrea Part of it: the Moon rises during it Begins before moonrise · Deepest 19:03 · Ends 19:09 GMT+3 Watch from here
• Honolulu, USA Part of it: the Moon sets during it Begins 05:56 · Deepest 06:03 · Ends after moonset HST Watch from here

The eclipse, contact by contact

In the outer shadow for 13m.

Latitude by latitude

Along each latitude, the longitudes with the Moon above the horizon for the whole eclipse, and those with it up at the greatest moment. An eclipse of the Moon looks the same from everywhere it is up.

How we worked it out: the Moon’s and the Sun’s places are Meeus’s solar and lunar theories, the ones the map draws. The Earth’s shadow is sized by Danjon’s rule, as NASA’s catalogue has it, and each contact is the instant the Moon’s edge crosses the shadow’s, found to the second. Each latitude is walked 1° of longitude at a time, the Moon’s altitude asked every 15 minutes. The tests hold these to NASA’s Five Millennium Canon of eclipses: instants within a few minutes, magnitudes within a few thousandths, the phases within two minutes.

• F. Espenak and J. Meeus, NASA Five Millennium Canon of Solar and Lunar Eclipses, which the tests hold these to
• J. Meeus, Astronomical Algorithms, ch. 25 (the Sun) and ch. 47 (the Moon), as the map draws them
• Danjon’s rule for the Earth’s shadow, as NASA’s lunar eclipse catalogue applies it (NASA/TP-2009-214172, §1.3)

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