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June 1973 lunar eclipse

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Penumbral lunar eclipse
June 1973 lunar eclipse
Penumbral eclipse
The Moon's hourly motion shown right to left
DateJune 15, 1973
Gamma−1.3217
Magnitude−0.6020
Saros cycle110 (69 of 72)
Penumbral204 minutes, 36 seconds
Contacts (UTC)
P119:07:39
Greatest20:49:57
P422:32:15
← January 1973July 1973 →

A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Friday, June 15, 1973, with an umbral magnitude of −0.6020. 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 3 hours after apogee (on June 15, 1973, at 18:05 UTC), the Moon's apparent diameter was smaller.

This eclipse was the second of four lunar eclipses in 1973, with the others occurring on January 18 (penumbral), July 15 (penumbral), and December 10 (partial).

Visibility

The eclipse was completely visible over much of Africa, eastern Europe, the western half of Asia, and Antarctica, seen rising over much of South America, western Europe, and west Africa and setting over east Asia and Australia.

Eclipse details

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

June 15, 1973 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 0.46852
Umbral Magnitude −0.60197
Gamma −1.32166
Sun Right Ascension 05h36m24.5s
Sun Declination +23°19'56.0"
Sun Semi-Diameter 15'44.6"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 17h36m42.3s
Moon Declination -24°31'09.1"
Moon Semi-Diameter 14'42.4"
Moon Equatorial Horizontal Parallax 0°53'58.5"
ΔT 43.8 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 June–July 1973
June 15
Ascending node (full moon)
June 30
Descending node (new moon)
July 15
Ascending node (full moon)
Penumbral lunar eclipse
Lunar Saros 110
Total solar eclipse
Solar Saros 136
Penumbral lunar eclipse
Lunar Saros 148

Related eclipses

Eclipses in 1973

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 110

Inex

Triad

Lunar eclipses of 1973–1976

Lunar eclipse series sets from 1973–1976
Ascending node   Descending node
Saros Date
Viewing
Type
Chart
Gamma Saros Date
Viewing
Type
Chart
Gamma
110 1973 Jun 15
Penumbral
−1.32166 115 1973 Dec 10
Partial
0.96441
120 1974 Jun 04
Partial
−0.54887 125 1974 Nov 29
Total
0.30540
130 1975 May 25
Total
0.23674 135 1975 Nov 18
Total
−0.41343
140 1976 May 13
Partial
0.95860 145 1976 Nov 06
Penumbral
−1.12760
Last set 1973 Jul 15 Last set 1973 Jan 18
Next set 1977 Apr 04 Next set 1977 Sep 27

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros). This lunar eclipse is related to two partial solar eclipses of Solar Saros 117.

June 10, 1964 June 21, 1982

See also

Notes

  1. "June 15–16, 1973 Penumbral Lunar Eclipse". timeanddate. Retrieved 3 January 2025.
  2. "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 3 January 2025.
  3. "Penumbral Lunar Eclipse of 1973 Jun 15" (PDF). NASA. Retrieved 3 January 2025.
  4. "Penumbral Lunar Eclipse of 1973 Jun 15". EclipseWise.com. Retrieved 3 January 2025.
  5. Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

External links


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