A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Monday, October 27, 1958,[1] with an umbral magnitude of −0.3118. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into the Earth's penumbra. Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. Occurring only about 15 hours after apogee (on October 27, 1958, at 0:20 UTC), the Moon's apparent diameter was smaller.[2]
Visibility
The eclipse was completely visible over Asia and Australia, seen rising over much of Africa, Europe, and the Middle East and setting over western North America and the central Pacific Ocean.[3]
 
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Eclipse details
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 0.78251 |
| Umbral Magnitude | −0.31176 |
| Gamma | −1.15707 |
| Sun Right Ascension | 14h05m52.5s |
| Sun Declination | -12°45'16.4" |
| Sun Semi-Diameter | 16'05.8" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 02h06m54.9s |
| Moon Declination | +11°44'42.3" |
| Moon Semi-Diameter | 14'42.6" |
| Moon Equatorial Horizontal Parallax | 0°53'59.2" |
| ΔT | 32.6 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.
| October 12 Ascending node (new moon) |
October 27 Descending node (full moon) |
|---|---|
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| Total solar eclipse Solar Saros 133 |
Penumbral lunar eclipse Lunar Saros 145 |
Related eclipses
Eclipses in 1958
- A penumbral lunar eclipse on April 4.
- An annular solar eclipse on April 19.
- A partial lunar eclipse on May 3.
- A total solar eclipse on October 12.
- A penumbral lunar eclipse on October 27.
Metonic
- Preceded by: Lunar eclipse of January 8, 1955
- Followed by: Lunar eclipse of August 15, 1962
Tzolkinex
- Preceded by: Lunar eclipse of September 15, 1951
- Followed by: Lunar eclipse of December 8, 1965
Half-Saros
- Preceded by: Solar eclipse of October 21, 1949
- Followed by: Solar eclipse of November 2, 1967
Tritos
- Preceded by: Lunar eclipse of November 28, 1947
- Followed by: Lunar eclipse of September 25, 1969
Lunar Saros 145
- Preceded by: Lunar eclipse of October 16, 1940
- Followed by: Lunar eclipse of November 6, 1976
Inex
- Preceded by: Lunar eclipse of November 17, 1929
- Followed by: Lunar eclipse of October 7, 1987
Triad
- Preceded by: Lunar eclipse of December 26, 1871
- Followed by: Lunar eclipse of August 27, 2045
Lunar eclipses of 1955–1958
This eclipse is a member of a semester series. An eclipse in a semester series of lunar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[5]
The penumbral lunar eclipse on January 8, 1955 occurs in the previous lunar year eclipse set, and the penumbral lunar eclipse on April 4, 1958 occurs in the next lunar year eclipse set.
| Lunar eclipse series sets from 1955 to 1958 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||||
| Saros | Date Viewing |
Type Chart |
Gamma | Saros | Date Viewing |
Type Chart |
Gamma | |
| 110 | 1955 Jun 05
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Penumbral
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−1.2384 | 115 | 1955 Nov 29
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Partial
|
0.9551 | |
| 120 | 1956 May 24
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Partial
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−0.4726 | 125 | 1956 Nov 18
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Total
|
0.2917 | |
| 130 | 1957 May 13
|
Total
|
0.3046 | 135 | 1957 Nov 07
|
Total
|
−0.4332 | |
| 140 | 1958 May 03
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Partial
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1.0188 | 145 | 1958 Oct 27
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Penumbral
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−1.1571 | |
Saros 145
This eclipse is a part of Saros series 145, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on August 11, 1832. It contains partial eclipses from February 24, 2157 through June 3, 2319; total eclipses from June 14, 2337 through November 13, 2589; and a second set of partial eclipses from November 25, 2607 through June 21, 2950. The series ends at member 71 as a penumbral eclipse on September 16, 3094.
The longest duration of totality will be produced by member 34 at 104 minutes, 21 seconds on August 7, 2427. All eclipses in this series occur at the Moon’s descending node of orbit.[6]
| Greatest | First | |||
|---|---|---|---|---|
| The greatest eclipse of the series will occur on 2427 Aug 07, lasting 104 minutes, 21 seconds.[7] | Penumbral | Partial | Total | Central |
| 1832 Aug 11 |
2157 Feb 24 |
2337 Jun 14 |
2373 Jul 05 | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 2499 Sep 19 |
2589 Nov 13 |
2950 Jun 21 |
3094 Sep 16 | |
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.
| Series members 1–21 occur between 1832 and 2200: | |||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | |||
| 1832 Aug 11 | 1850 Aug 22 | 1868 Sep 02 | |||
| 4 | 5 | 6 | |||
| 1886 Sep 13 | 1904 Sep 24 | 1922 Oct 06 | |||
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| 7 | 8 | 9 | |||
| 1940 Oct 16 | 1958 Oct 27 | 1976 Nov 06 | |||
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| 10 | 11 | 12 | |||
| 1994 Nov 18 | 2012 Nov 28 | 2030 Dec 09 | |||
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| 13 | 14 | 15 | |||
| 2048 Dec 20 | 2066 Dec 31 | 2085 Jan 10 | |||
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| 16 | 17 | 18 | |||
| 2103 Jan 23 | 2121 Feb 02 | 2139 Feb 13 | |||
| 19 | 20 | 21 | |||
| 2157 Feb 24 | 2175 Mar 07 | 2193 Mar 17 | |||
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.
| Series members between 1801 and 2078 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1806 Jan 05 (Saros 131) |
1816 Dec 04 (Saros 132) |
1827 Nov 03 (Saros 133) |
1838 Oct 03 (Saros 134) |
1849 Sep 02 (Saros 135) | |||||
| 1860 Aug 01 (Saros 136) |
1871 Jul 02 (Saros 137) |
1882 Jun 01 (Saros 138) |
1893 Apr 30 (Saros 139) |
1904 Mar 31 (Saros 140) | |||||
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| 1915 Mar 01 (Saros 141) |
1926 Jan 28 (Saros 142) |
1936 Dec 28 (Saros 143) |
1947 Nov 28 (Saros 144) |
1958 Oct 27 (Saros 145) | |||||
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| 1969 Sep 25 (Saros 146) |
1980 Aug 26 (Saros 147) |
1991 Jul 26 (Saros 148) |
2002 Jun 24 (Saros 149) |
2013 May 25 (Saros 150) | |||||
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| 2078 Nov 19 (Saros 156) | |||||||||
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[8] This lunar eclipse is related to two solar eclipses of Solar Saros 152.
| October 21, 1949 | November 2, 1967 |
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See also
Notes
- ^ "October 27–28, 1958 Penumbral Lunar Eclipse". timeanddate. Retrieved 25 December 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 25 December 2024.
- ^ "Penumbral Lunar Eclipse of 1958 Oct 27" (PDF). NASA. Retrieved 25 December 2024.
- ^ "Penumbral Lunar Eclipse of 1958 Oct 27". EclipseWise.com. Retrieved 25 December 2024.
- ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
- ^ "NASA - Catalog of Lunar Eclipses of Saros 145". eclipse.gsfc.nasa.gov.
- ^ Listing of Eclipses of series 145
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
- 1958 Oct 27 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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