A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Saturday, May 3, 1958,[1] with an umbral magnitude of 0.0092. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in 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 about 1.2 days after perigee (on May 2, 1958, at 7:00 UTC), the Moon's apparent diameter was larger.[2]
| Partial eclipse | |||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||
| Date | May 3, 1958 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 1.0188 | ||||||||||||
| Magnitude | 0.0092 | ||||||||||||
| Saros cycle | 140 (22 of 80) | ||||||||||||
| Partiality | 21 minutes, 2 seconds | ||||||||||||
| Penumbral | 242 minutes, 13 seconds | ||||||||||||
| |||||||||||||
Visibility
editThe eclipse was completely visible over northeast Asia, Australia, and Antarctica, seen rising over east, southeast, and south Asia and setting over much of North America and western South America.[3]
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Eclipse details
editShown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 0.96760 |
| Umbral Magnitude | 0.00919 |
| Gamma | 1.01884 |
| Sun Right Ascension | 02h40m25.8s |
| Sun Declination | +15°36'27.0" |
| Sun Semi-Diameter | 15'51.8" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 14h41m19.7s |
| Moon Declination | -14°35'56.8" |
| Moon Semi-Diameter | 16'33.1" |
| Moon Equatorial Horizontal Parallax | 1°00'44.9" |
| ΔT | 32.4 s |
Eclipse season
editThis 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. The first and last eclipse in this sequence is separated by one synodic month.
| April 4 Ascending node (full moon) |
April 19 Descending node (new moon) |
May 3 Ascending node (full moon) |
|---|---|---|
 |
 |
|
| Penumbral lunar eclipse Lunar Saros 102 |
Annular solar eclipse Solar Saros 128 |
Partial lunar eclipse Lunar Saros 140 |
Related eclipses
editEclipses in 1958
edit- 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
edit- Preceded by: Lunar eclipse of July 16, 1954
- Followed by: Lunar eclipse of February 19, 1962
Tzolkinex
edit- Preceded by: Lunar eclipse of March 23, 1951
- Followed by: Lunar eclipse of June 14, 1965
Half-Saros
edit- Preceded by: Solar eclipse of April 28, 1949
- Followed by: Solar eclipse of May 9, 1967
Tritos
edit- Preceded by: Lunar eclipse of June 3, 1947
- Followed by: Lunar eclipse of April 2, 1969
Lunar Saros 140
edit- Preceded by: Lunar eclipse of April 22, 1940
- Followed by: Lunar eclipse of May 13, 1976
Inex
edit- Preceded by: Lunar eclipse of May 23, 1929
- Followed by: Lunar eclipse of April 14, 1987
Triad
edit- Preceded by: Lunar eclipse of July 2, 1871
- Followed by: Lunar eclipse of March 3, 2045
Lunar eclipses of 1955–1958
edit| Ascending node | Descending node | |||||
|---|---|---|---|---|---|---|
| Saros | Date viewing |
Type chart |
Saros | Date viewing |
Type chart | |
| 110 | 1955 Jun 5
|
Penumbral
|
115 | 1955 Nov 29
|
Partial
| |
| 120 | 1956 May 24
|
Partial
|
125 | 1956 Nov 18
|
Total
| |
| 130 | 1957 May 13
|
Total
|
135 | 1957 Nov 7
|
Total
| |
| 140 | 1958 May 3
|
Partial
|
145 | 1958 Oct 27
|
Penumbral
| |
| Last set | 1954 Jul 16 | Last set | 1955 Jan 8 | |||
| Next set | 1958 Apr 4 | Next set | 1959 Sep 17 | |||
Half-Saros cycle
editA lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[5] This lunar eclipse is related to two partial solar eclipses of Solar Saros 147.
| April 28, 1949 | May 9, 1967 |
|---|---|
|
|
See also
editNotes
edit- ^ "May 3, 1958 Partial Lunar Eclipse". timeanddate. Retrieved 25 December 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 25 December 2024.
- ^ "Partial Lunar Eclipse of 1958 May 03" (PDF). NASA. Retrieved 25 December 2024.
- ^ "Partial Lunar Eclipse of 1958 May 03". EclipseWise.com. Retrieved 25 December 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit- 1958 May 03 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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