June 2010 lunar eclipse

The partial lunar eclipse of June 26, 2010 was the first of two lunar eclipses in 2010. At maximum eclipse, about 54% of the moon was covered by the earth's shadow.[1]

June 2010 lunar eclipse
Partial eclipse
Near greatest eclipse from Canberra, Australia, at 11:31 UTC
Date26 June 2010
Gamma-0.7091
Magnitude0.5368
Saros cycle120 (58 of 84)
Partiality162 minutes, 53 seconds
Penumbral322 minutes, 13 seconds

This eclipse is a part of Lunar Saros 120 series, repeating every 18 years and 10 days, last occurring on June 15, 1992, and will next repeat on July 6, 2028. This series is winding down: The final total eclipse of this series was on May 14, 1938 and the final partial lunar eclipse will be on July 28, 2064.

Visibility
NASA chart of the eclipse

The entire umbral phase was visible after sunset Saturday evening throughout the Pacific, New Zealand, Australia, the Philippines and Japan. The point where the moon was directly overhead at maximum eclipse lay over the South Pacific Ocean, far to the southwest of Hawaii. The lunar eclipse seen over the Philippines on Saturday evening despite of rainshowers and thick clouds, but it clearly visible throughout the night sky.


This simulation shows the view of the earth from the moon from the center of the earth at greatest eclipse.

Map

It was seen before sunrise on Saturday morning setting over western North and South America:

Times of over North America
Event PDT
(UTC-7)		 MDT
(UTC-6)		 CDT
(UTC-5)		 EDT
(UTC-4)		 UTC
Start penumbral (P1) 1:57 a.m. 2:57 a.m. 3:57 a.m. 4:57 a.m. 8:57 a.m.
Start umbral (U1) 3:17 a.m. 4:17 a.m. 5:17 a.m. 6:17 a.m. 10:17 a.m.
Greatest eclipse 4:38 a.m. 5:38 a.m. Set Set 11:38 a.m.
End umbral (U4) Set Set Set Set 1:00 p.m.
End penumbral (P4) Set Set Set Set 2:20 p.m.

Australia
  • Simulated appearance during greatest eclipse at 11:38 UTC (South down)
  • From Hobart, Australia
    11:09 UTC

America
  • Early eclipse from Buenos Aires, Argentina
    10:29 UTC
  • Animation from California

Eclipses of 2010

Lunar year (354 days)

This eclipse is the one of five lunar eclipses in a short-lived series. The lunar year series repeats after 12 lunations or 354 days (Shifting back about 10 days in sequential years). Because of the date shift, the Earth's shadow will be about 11 degrees west in sequential events.

Metonic series (19 years)

The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the earth's shadow will be in nearly the same location relative to the background stars.

Ascending node Descending node
  1. 1991 Jun 27 - penumbral (110)
  2. 2010 Jun 26 - partial (120)
  3. 2029 Jun 26 - total (130)
  4. 2048 Jun 26 - partial (140)
  5. 2067 Jun 27 - penumbral (150)
  1. 1991 Dec 21 - partial (115)
  2. 2010 Dec 21 - total (125)
  3. 2029 Dec 20 - total (135)
  4. 2048 Dec 20 - partial (145)

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[2] This lunar eclipse is related to two total solar eclipses of Solar Saros 127.

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See also

Notes
  1. SPACE.com: Partial Lunar Eclipse Coming On June 26
  2. Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

Photos:

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