Solar eclipse of January 27, 2055

Solar eclipse of January 27, 2055
Solar eclipse of January 27, 2055
	Map
Type of eclipse
Nature	Partial
Gamma	1.155
Magnitude	0.6932
Maximum eclipse
Coordinates	69°30′N 112°12′W / 69.5°N 112.2°W
Times (UTC)
Greatest eclipse	17:54:05
References
Saros	122 (60 of 70)
Catalog # (SE5000)	9630

A partial solar eclipse will occur at the Moon's descending node of orbit on Wednesday, January 27, 2055,^[1] with a magnitude of 0.6932. 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.

The partial solar eclipse will be visible for most of North America.

Eclipse details

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.^[2]

January 27, 2055 Solar Eclipse Times
Event	Time (UTC)
First Penumbral External Contact	2055 January 27 at 15:49:08.2 UTC
Ecliptic Conjunction	2055 January 27 at 17:40:43.6 UTC
Greatest Eclipse	2055 January 27 at 17:54:05.3 UTC
Equatorial Conjunction	2055 January 27 at 18:16:10.6 UTC
Last Penumbral External Contact	2055 January 27 at 19:58:56.1 UTC

January 27, 2055 Solar Eclipse Parameters
Parameter	Value
Eclipse Magnitude	0.69325
Eclipse Obscuration	0.59655
Gamma	1.15497
Sun Right Ascension	20h40m41.0s
Sun Declination	-18°19'18.9"
Sun Semi-Diameter	16'14.5"
Sun Equatorial Horizontal Parallax	08.9"
Moon Right Ascension	20h39m58.6s
Moon Declination	-17°17'11.5"
Moon Semi-Diameter	14'53.3"
Moon Equatorial Horizontal Parallax	0°54'38.4"
ΔT	87.2 s

Eclipse season

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 2055
January 27 Descending node (new moon)	February 11 Ascending node (full moon)

Partial solar eclipse Solar Saros 122	Total lunar eclipse Lunar Saros 134

Related eclipses

Solar eclipses of 2054–2058

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.^[3]

The partial solar eclipses on March 9, 2054 and September 2, 2054 occur in the previous lunar year eclipse set, and the partial solar eclipses on May 22, 2058 and November 16, 2058 occur in the next lunar year eclipse set.

Solar eclipse series sets from 2054 to 2058
Ascending node			Descending node
Saros	Map	Gamma	Saros	Map	Gamma
117	August 3, 2054 Partial	−1.4941	122	January 27, 2055 Partial	1.155
127	July 24, 2055 Total	−0.8012	132	January 16, 2056 Annular	0.4199
137	July 12, 2056 Annular	−0.0426	142	January 5, 2057 Total	−0.2837
147	July 1, 2057 Annular	0.7455	152	December 26, 2057 Total	−0.9405
157	June 21, 2058 Partial	1.4869

Saros 122

This eclipse is a part of Saros series 122, repeating every 18 years, 11 days, and containing 70 events. The series started with a partial solar eclipse on April 17, 991 AD. It contains total eclipses from July 12, 1135 through August 3, 1171; hybrid eclipses on August 13, 1189 and August 25, 1207; and annular eclipses from September 4, 1225 through October 10, 1874. The series ends at member 70 as a partial eclipse on May 17, 2235. 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 totality was produced by member 9 at 1 minutes, 25 seconds on July 12, 1135, and the longest duration of annularity was produced by member 50 at 6 minutes, 28 seconds on October 10, 1874. All eclipses in this series occur at the Moon’s descending node of orbit.^[4]

Series members 46–68 occur between 1801 and 2200:
46	47	48
August 28, 1802	September 7, 1820	September 18, 1838
49	50	51
September 29, 1856	October 10, 1874	October 20, 1892
52	53	54
November 2, 1910	November 12, 1928	November 23, 1946
55	56	57
December 4, 1964	December 15, 1982	December 25, 2000
58	59	60
January 6, 2019	January 16, 2037	January 27, 2055
61	62	63
February 7, 2073	February 18, 2091	March 1, 2109
64	65	66
March 13, 2127	March 23, 2145	April 3, 2163
67	68
April 14, 2181	April 25, 2199

Metonic series

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 June 23, 2047 and November 16, 2134
June 22–23	April 10–11	January 27–29	November 15–16	September 3–5
118	120	122	124	126
June 23, 2047	April 11, 2051	January 27, 2055	November 16, 2058	September 3, 2062
128	130	132	134	136
June 22, 2066	April 11, 2070	January 27, 2074	November 15, 2077	September 3, 2081
138	140	142	144	146
June 22, 2085	April 10, 2089	January 27, 2093	November 15, 2096	September 4, 2100
148	150	152	154	156
June 22, 2104	April 11, 2108	January 29, 2112	November 16, 2115	September 5, 2119
158	160	162	164
June 23, 2123			November 16, 2134

Tritos series

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 eclipses on April 8, 1902 (part of Saros 108) and January 5, 1935 (part of Saros 111) are also a part of this series but are not included in the table below.

Series members between 2000 and 2200
July 1, 2000 (Saros 117)	June 1, 2011 (Saros 118)	April 30, 2022 (Saros 119)	March 30, 2033 (Saros 120)	February 28, 2044 (Saros 121)
January 27, 2055 (Saros 122)	December 27, 2065 (Saros 123)	November 26, 2076 (Saros 124)	October 26, 2087 (Saros 125)	September 25, 2098 (Saros 126)
August 26, 2109 (Saros 127)	July 25, 2120 (Saros 128)	June 25, 2131 (Saros 129)	May 25, 2142 (Saros 130)	April 23, 2153 (Saros 131)
March 23, 2164 (Saros 132)	February 21, 2175 (Saros 133)	January 20, 2186 (Saros 134)	December 19, 2196 (Saros 135)

Inex series

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
July 8, 1823 (Saros 114)	June 17, 1852 (Saros 115)	May 27, 1881 (Saros 116)
May 9, 1910 (Saros 117)	April 19, 1939 (Saros 118)	March 28, 1968 (Saros 119)
March 9, 1997 (Saros 120)	February 17, 2026 (Saros 121)	January 27, 2055 (Saros 122)
January 7, 2084 (Saros 123)	December 19, 2112 (Saros 124)	November 28, 2141 (Saros 125)
November 8, 2170 (Saros 126)	October 19, 2199 (Saros 127)