April 2015 lunar eclipse

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Total lunar eclipse
April 4, 2015
Lunar eclipse chart close-2015Apr04.png
The moon passes right to left through the Earth's shadow
Gamma 0.4460
Duration (hr:mn:sc)
Totality 00:04:43
Partial 03:29:00
Penumbral 05:57:32
Contacts (UTC)
P1 9:01:27
U1 10:15:45
U2 11:57:54
Greatest 12:00:14
U3 12:02:37
U4 13:44:46
P4 14:58:58

A total lunar eclipse will take place on 4 April 2015. It is the former of two total lunar eclipses in 2015, and the third in a tetrad (four total lunar eclipses in series). Other eclipses in the tetrad are those of April 15, 2014, October 8, 2014, and September 28, 2015.

Totality will last only 4 minutes and 43 seconds.[1]

Visibility[edit]

The eclipse will be visible over western North America, the Pacific, east Asia, Australia and New Zealand.

Lunar eclipse from moon-2015Apr04.png

Background[edit]

Main article: Lunar eclipse

A lunar eclipse occurs when the Moon passes within Earth's umbra (shadow). As the eclipse begins, the Earth's shadow first darkens the Moon slightly. Then, the shadow begins to "cover" part of the Moon, turning it a dark red-brown color (typically - the color can vary based on atmospheric conditions). The Moon appears to be reddish because of Rayleigh scattering (the same effect that causes sunsets to appear reddish) and the refraction of that light by the Earth's atmosphere into its umbra.[2]

The following simulation shows the approximate appearance of the Moon passing through the earth's shadow. The Moon's brightness is exaggerated within the umbral shadow. The northern portion of the Moon was closest to the center of the shadow, making it darkest, and most red in appearance. Animation April 4 2015 lunar eclipse appearance.gif

Timing[edit]

Local times of contacts
Timezone
adjustments from
UTC
+8h +11h +13h -9h -8h -7h -6h -5h -4h
AWST AEDT NZDT HADT AKDT PDT MDT CDT EDT
Event Evening April 4 Morning April 4
P1 Penumbral begins 5:01 pm 8:01 pm 10:01 pm 12:01 am 1:01 am 2:01 am 3:01 am 4:01 am 5:01 am
U1 Partial begins 6:16 pm 9:16 pm 11:16 pm 1:16 am 2:16 am 3:16 am 4:16 am 5:16 am 6:16 am
U2 Total begins 7:58 pm 9:58 pm 12:58 am 2:58 am 3:58 am 4:58 am 5:58 am Set Set
Greatest eclipse 8:00 pm 11:00 pm 1:00 am 3:00 am 4:00 am 5:00 am 6:00 am Set Set
U3 Total ends 8:03 pm 11:03 pm 1:03 am 3:03 am 4:03 am 5:03 am 6:03 am Set Set
U4 Partial ends 9:45 pm 12:45 am 2:45 am 4:45 am 5:45 am 6:45 am Set Set Set
P4 Penumbral ends 10:59 pm 1:59 am 3:59 am 5:59 am 6:59 am Set Set Set Set
Contact points relative to the earth's umbral and penumbral shadows, here with the moon near is descending node

The timing of total lunar eclipses are determined by its contacts:[3]

P1 (First contact): Beginning of the penumbral eclipse. The Earth's penumbra touches the Moon's outer limb.
U1 (Second contact): Beginning of the partial eclipse. The Earth's umbra touches the Moon's outer limb.
U2 (Third contact): Beginning of the total eclipse. The Moon's surface is entirely within the Earth's umbra.
Greatest eclipse: The peak stage of the total eclipse. The Moon is at its closest to the center of the Earth's umbra.
U3 (Fourth contact): End of the total eclipse. The Moon's outer limb exits the Earth's umbra.
U4 (Fifth contact): End of the partial eclipse. The Earth's umbra leaves the Moon's surface.
P4 (Sixth contact): End of the penumbral eclipse. The Earth's penumbra no longer makes contact with the Moon.


Related eclipses[edit]

Lunar year series[edit]

The eclipse is the one of four lunar eclipses in a short-lived series at the ascending node of the moon's orbit.

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.

Lunar eclipse series sets from 2013–2016
Ascending node   Descending node
Saros Viewing
date
Type Saros Viewing
date
Type
112
Partial lunar eclipse 2013-04-25 2018UTC.jpg
2013 Apr 25
Lunar eclipse from moon-2013Apr25.png
Partial
Lunar eclipse chart close-2013Apr25.png
117
2013 Oct 18
Lunar eclipse from moon-2013Oct18.png
Penumbral
Lunar eclipse chart close-2013Oct18.png
122
Lunar eclipse April 15 2014 California Alfredo Garcia Jr1.jpg
2014 Apr 15
Lunar eclipse from moon-2014Apr15.png
Total
Lunar eclipse chart close-2014Apr15.png
127
Lunar eclipse October 8 2014 California Alfredo Garcia Jr mideclipse.JPG
2014 Oct 08
Lunar eclipse from moon-2014Oct08.png
Total
Lunar eclipse chart close-2014Oct08.png
132 2015 Apr 04
Lunar eclipse from moon-2015Apr04.png
Total
Lunar eclipse chart close-2015Apr04.png
137 2015 Sep 28
Lunar eclipse from moon-2015Sep28.png
Total
Lunar eclipse chart close-2015Sep28.png
142 2016 Mar 23
Lunar eclipse from moon-2016Mar23.png
Penumbral
Lunar eclipse chart close-2016Mar23.png
147 2016 Sep 16
Lunar eclipse from moon-2016Sep16.png
Penumbral
Lunar eclipse chart close-2016Sep16.png
Last set 2013 May 25 Last set 2012 Nov 28
Next set 2017 Feb 11 Next set 2016 Aug 08

Saros series[edit]

Lunar saros series 132, repeating every 18 years and 11 days, has a total of 71 lunar eclipse events including 12 total lunar eclipses.

Greatest First
Lunar eclipse chart close-2123Jun09.png
The greatest eclipse of the series on 2123 Jun 9 will last 106 minutes.[4]
Penumbral Partial Total Central
1492 May 12
Lunar eclipse chart close-1492May12.png
1636 Aug 16
Lunar eclipse chart close-1636Aug16.png
2015 Apr 4
Lunar eclipse chart close-2015Apr04.png
2069 May 6
Lunar eclipse chart close-2069May06.png
Last
Central Total Partial Penumbral
2177 Jul 11
Lunar eclipse chart close-2177Jul11.png
2213 Aug 2
Lunar eclipse chart close-2213Aug02.png
2429 Dec 11
Lunar eclipse chart close-2429Dec11.png
2754 Jun 26
Lunar eclipse chart close-2754Jun26.png

There are 11 series events between 1901 and 2100, grouped into threes (called an exeligmos), each column with approximately the same viewing longitude on earth.

1901–2100
1907 Jan 29 1925 Feb 8 1943 Feb 20
Lunar eclipse chart close-1907Jan29.png Lunar eclipse from moon-1907Jan29.png Lunar eclipse chart close-1925Feb08.png Lunar eclipse from moon-1925Feb08.png Lunar eclipse chart close-1943Feb20.png Lunar eclipse from moon-1943Feb20.png
1961 Mar 2 1979 Mar 13 1997 Mar 24
Lunar eclipse chart close-1961Mar02.png Lunar eclipse from moon-1961Mar02.png Lunar eclipse chart close-1979Mar13.png Lunar eclipse from moon-1979Mar13.png Lunar eclipse chart close-1997Mar24.png Lunar eclipse from moon-1997Mar24.png
2015 Apr 4 2033 Apr 14 2051 Apr 26
Lunar eclipse chart close-2015Apr04.png Lunar eclipse from moon-2015Apr04.png Lunar eclipse chart close-2033Apr14.png Lunar eclipse from moon-2033Apr14.png Lunar eclipse chart close-2051Apr26.png Lunar eclipse from moon-2051Apr26.png
2069 May 6 2087 May 17
Lunar eclipse chart close-2069May06.png Lunar eclipse from moon-2069May06.png Lunar eclipse chart close-2087May17.png Lunar eclipse from moon-2087May17.png

See also[edit]

Notes[edit]

  1. ^ http://eclipse.gsfc.nasa.gov/LEplot/LEplot2001/LE2015Apr04T.pdf
  2. ^ Fred Espenak and Jean Meeus. "Visual Appearance of Lunar Eclipses". NASA. Retrieved April 13, 2014. 
  3. ^ Clarke, Kevin. "On the nature of eclipses". Inconstant Moon. Cyclopedia Selenica. Retrieved 19 December 2010. 
  4. ^ Listing of Eclipses of series 132

External links[edit]