Solar eclipse of September 11, 2007

61°00′S 90°12′W / 61°S 90.2°W / -61; -90.2Times (UTC)Greatest eclipse12:32:24ReferencesSaros154 (6 of 71)Catalog # (SE5000)9524

A partial solar eclipse occurred at the Moon’s descending node of orbit on Tuesday, September 11, 2007,^[1][2] with a magnitude of 0.7507. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.

A partial eclipse was visible for parts of central and southern South America, the Antarctic Peninsula, and east Antarctica.

• 
  Niterói, Brazil, 11:21 UTC
• 
  Rio de Janeiro, Brazil, 11:40 UTC
• 
  Composition from Campinas, Brazil

Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.^[3]

September 11, 2007 Solar Eclipse Times

Event	Time (UTC)
First Penumbral External Contact	2007 September 11 at 10:26:47.9 UTC
Greatest Eclipse	2007 September 11 at 12:32:24.5 UTC
Ecliptic Conjunction	2007 September 11 at 12:45:19.4 UTC
Equatorial Conjunction	2007 September 11 at 13:43:46.3 UTC
Last Penumbral External Contact	2007 September 11 at 14:37:37.6 UTC

September 11, 2007 Solar Eclipse Parameters

Parameter	Value
Eclipse Magnitude	0.75070
Eclipse Obscuration	0.67189
Gamma	−1.12552
Sun Right Ascension	11h17m20.8s
Sun Declination	+04°35'13.3"
Sun Semi-Diameter	15'53.2"
Sun Equatorial Horizontal Parallax	08.7"
Moon Right Ascension	11h15m21.9s
Moon Declination	+03°40'57.3"
Moon Semi-Diameter	15'00.5"
Moon Equatorial Horizontal Parallax	0°55'05.0"
ΔT	65.3 s

This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by a fortnight.

Eclipse season of August–September 2007

August 28 Ascending node (full moon)	September 11 Descending node (new moon)
Total lunar eclipse Lunar Saros 128	Partial solar eclipse Solar Saros 154

• A total lunar eclipse on March 3.
• A partial solar eclipse on March 19.
• A total lunar eclipse on August 28.
• A partial solar eclipse on September 11.

• Preceded by: Solar eclipse of November 23, 2003
• Followed by: Solar eclipse of July 1, 2011

• Preceded by: Solar eclipse of July 31, 2000
• Followed by: Solar eclipse of October 23, 2014

• Preceded by: Lunar eclipse of September 6, 1998
• Followed by: Lunar eclipse of September 16, 2016

• Preceded by: Solar eclipse of October 12, 1996
• Followed by: Solar eclipse of August 11, 2018

• Preceded by: Solar eclipse of August 31, 1989
• Followed by: Solar eclipse of September 21, 2025

• Preceded by: Solar eclipse of October 2, 1978
• Followed by: Solar eclipse of August 21, 2036

• Preceded by: Solar eclipse of November 10, 1920
• Followed by: Solar eclipse of July 12, 2094

This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.^[4]

Solar eclipse series sets from 2004 to 2007
Ascending node				Descending node
Saros	Map	Gamma		Saros	Map	Gamma
119	April 19, 2004 Partial	−1.13345		124	October 14, 2004 Partial	1.03481
129 Partial in Naiguatá, Venezuela	April 8, 2005 Hybrid	−0.34733		134 Annularity in Madrid, Spain	October 3, 2005 Annular	0.33058
139 Totality in Side, Turkey	March 29, 2006 Total	0.38433		144 Partial in São Paulo, Brazil	September 22, 2006 Annular	−0.40624
149 Partial in Jaipur, India	March 19, 2007 Partial	1.07277		154 Partial in Córdoba, Argentina	September 11, 2007 Partial	−1.12552

This eclipse is a part of Saros series 154, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on July 19, 1917. It contains annular eclipses from October 3, 2043 through March 27, 2332; hybrid eclipses from April 7, 2350 through April 29, 2386; and total eclipses from May 9, 2404 through May 29, 3035. The series ends at member 71 as a partial eclipse on August 25, 3179. Its eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.

The longest duration of annularity will be produced by member 9 at 3 minutes, 41 seconds on October 13, 2061, and the longest duration of totality will be produced by member 35 at 4 minutes, 50 seconds on July 25, 2530. All eclipses in this series occur at the Moon’s descending node of orbit.^[5]

Series members 1–16 occur between 1917 and 2200:
1	2	3
July 19, 1917	July 30, 1935	August 9, 1953
4	5	6
August 20, 1971	August 31, 1989	September 11, 2007
7	8	9
September 21, 2025	October 3, 2043	October 13, 2061
10	11	12
October 24, 2079	November 4, 2097	November 16, 2115
13	14	15
November 26, 2133	December 8, 2151	December 18, 2169
16
December 29, 2187

The metonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition, the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days). All eclipses in this table occur at the Moon's descending node.

22 eclipse events between September 12, 1931 and July 1, 2011
September 11–12	June 30–July 1	April 17–19	February 4–5	November 22–23
114	116	118	120	122
September 12, 1931	June 30, 1935	April 19, 1939	February 4, 1943	November 23, 1946
124	126	128	130	132
September 12, 1950	June 30, 1954	April 19, 1958	February 5, 1962	November 23, 1965
134	136	138	140	142
September 11, 1969	June 30, 1973	April 18, 1977	February 4, 1981	November 22, 1984
144	146	148	150	152
September 11, 1988	June 30, 1992	April 17, 1996	February 5, 2000	November 23, 2003
154	156
September 11, 2007	July 1, 2011

This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.

The partial solar eclipse on November 4, 2116 (part of Saros 164) is also a part of this series but is not included in the table below.

Series members between 1801 and 2029
March 24, 1811 (Saros 136)	February 21, 1822 (Saros 137)	January 20, 1833 (Saros 138)	December 21, 1843 (Saros 139)	November 20, 1854 (Saros 140)
October 19, 1865 (Saros 141)	September 17, 1876 (Saros 142)	August 19, 1887 (Saros 143)	July 18, 1898 (Saros 144)	June 17, 1909 (Saros 145)
May 18, 1920 (Saros 146)	April 18, 1931 (Saros 147)	March 16, 1942 (Saros 148)	February 14, 1953 (Saros 149)	January 14, 1964 (Saros 150)
December 13, 1974 (Saros 151)	November 12, 1985 (Saros 152)	October 12, 1996 (Saros 153)	September 11, 2007 (Saros 154)	August 11, 2018 (Saros 155)
July 11, 2029 (Saros 156)

This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.

Series members between 1801 and 2200
January 30, 1805 (Saros 147)	January 9, 1834 (Saros 148)	December 21, 1862 (Saros 149)
December 1, 1891 (Saros 150)	November 10, 1920 (Saros 151)	October 21, 1949 (Saros 152)
October 2, 1978 (Saros 153)	September 11, 2007 (Saros 154)	August 21, 2036 (Saros 155)
August 2, 2065 (Saros 156)	July 12, 2094 (Saros 157)	June 23, 2123 (Saros 158)
June 3, 2152 (Saros 159)	May 13, 2181 (Saros 160)

• NASA graphics
• NASA map

• Partial Solar Eclipse, September 11, 2007 from Buenos Aires, Argentina by Jay Pasachoff