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April 1958 lunar eclipse

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Penumbral lunar eclipse April 4, 1958
April 1958 lunar eclipse
Penumbral eclipse
The Moon's hourly motion shown right to left
DateApril 4, 1958
Gamma−1.5381
Magnitude−0.9421
Saros cycle102 (84 of 84)
Penumbral31 minutes, 2 seconds
Contacts (UTC)
P13:44:10
Greatest3:59:43
P44:15:12
← November 1957May 1958 →

A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Friday, April 4, 1958, with an umbral magnitude of −0.9421. 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 16.5 hours before perigee (on April 3, 1958, at 20:30 UTC), the Moon's apparent diameter was larger.

This was the last penumbral lunar eclipse in Lunar Saros 102. In this extremely marginal eclipse, the Moon barely clipped the edge of the Earth's penumbral shadow. This caused a microscopic darkening of just 1% of the Moon's disc for about 31 minutes, which was essentially impossible to see.

Visibility

The eclipse was completely visible over North America, South America, most of Africa and western Europe.

Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.

April 4, 1958 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 0.01359
Umbral Magnitude −0.94211
Gamma −1.53805
Sun Right Ascension 00h51m06.5s
Sun Declination +05°28'40.0"
Sun Semi-Diameter 15'59.5"
Sun Equatorial Horizontal Parallax 08.8"
Moon Right Ascension 12h49m12.4s
Moon Declination -06°58'45.5"
Moon Semi-Diameter 16'43.9"
Moon Equatorial Horizontal Parallax 1°01'24.6"
ΔT 32.4 s

Eclipse season

See also: Eclipse cycle

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. The first and last eclipse in this sequence is separated by one synodic month.

Eclipse season of April–May 1958
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

Eclipses in 1958

Tzolkinex

Lunar Saros 102

Lunar eclipses of 1958–1962

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.

The lunar eclipses on May 3, 1958 (partial) and October 28, 1958 (penumbral) occur in the previous lunar year eclipse set, and the penumbral lunar eclipse on July 17, 1962 occurs in the next lunar year eclipse set.

Lunar eclipse series sets from 1958 to 1962
Ascending node   Descending node
Saros Date
Viewing
Type
Chart
Gamma Saros Date
Viewing
Type
Chart
Gamma
102 1958 Apr 04
Penumbral
−1.5381
112 1959 Mar 24
Partial
−0.8757 117 1959 Sep 17
Penumbral
1.0296
122 1960 Mar 13
Total
−0.1799 127 1960 Sep 05
Total
0.2422
132 1961 Mar 02
Partial
0.5541 137 1961 Aug 26
Partial
−0.4895
142 1962 Feb 19
Penumbral
1.2512 147 1962 Aug 15
Penumbral
−1.2210

Saros 102

This eclipse is a part of Saros series 102, repeating every 18 years, 11 days, and containing 84 events. The series started with a penumbral lunar eclipse on October 5, 461 AD. It contains partial eclipses from May 20, 840 AD through July 13, 930 AD; total eclipses from July 23, 948 AD through April 20, 1399; and a second set of partial eclipses from May 1, 1417 through July 16, 1543. The series ends at member 84 as a penumbral eclipse on April 4, 1958.

The longest duration of totality was produced by member 36 at 104 minutes, 43 seconds on October 7, 1074. All eclipses in this series occur at the Moon’s ascending node of orbit.

Greatest First
The greatest eclipse of the series occurred on 1074 Oct 07, lasting 104 minutes, 43 seconds. Penumbral Partial Total Central
461 Oct 05
840 May 20
948 Jul 23
984 Aug 14
Last
Central Total Partial Penumbral
1345 Mar 18
1399 Apr 20
1543 Jul 16
1958 Apr 04

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 76–84 occur between 1801 and 1958:
76 77 78
1814 Jan 06 1832 Jan 17 1850 Jan 28
79 80 81
1868 Feb 08 1886 Feb 18 1904 Mar 02
82 83 84
1922 Mar 13 1940 Mar 23 1958 Apr 04

See also

Notes

  1. "April 3–4, 1958 Penumbral Lunar Eclipse". timeanddate. Retrieved 25 December 2024.
  2. "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 25 December 2024.
  3. "Penumbral Lunar Eclipse of 1958 Apr 04" (PDF). NASA. Retrieved 25 December 2024.
  4. "Penumbral Lunar Eclipse of 1958 Apr 04". EclipseWise.com. Retrieved 25 December 2024.
  5. 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.
  6. "NASA - Catalog of Lunar Eclipses of Saros 102". eclipse.gsfc.nasa.gov.
  7. Listing of Eclipses of series 102

External links

Lunar eclipses
Lists of lunar eclipses
Lunar eclipses
by era
Lunar eclipses
by saros series
August 2017 lunar eclipse
Partial eclipses
May 2022 lunar eclipse
Total eclipses
February 2017 lunar eclipse
Penumbral eclipses
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