June 1947 lunar eclipse

{{Infobox lunar eclipse

| type = partial

| image = Lunar eclipse chart close-1947Jun03.png

| caption = The Moon's hourly motion shown right to left

| date = June 3, 1947

| gamma = −0.9850

| magnitude = 0.0202

| saros_ser = 139

| saros_no = 18 of 81

| partiality = 34 minutes, 42 seconds

| penumbral = 288 minutes, 53 seconds

| p1 = 16:50:48

| u1 = 18:57:51

| greatest = 19:15:16

| u4 = 19:32:33

| p4 = 21:39:42

| previous = December 1946

| next = November 1947

}}

A partial lunar eclipse occurred at the Moon’s descending node of orbit on Tuesday, June 3, 1947,{{cite web|title=June 3–4, 1947 Partial Lunar Eclipse|url=https://www.timeanddate.com/eclipse/lunar/1947-june-3|publisher=timeanddate|access-date=20 December 2024}} with an umbral magnitude of 0.0202. 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 3.2 days before apogee (on June 6, 1947, at 23:00 UTC), the Moon's apparent diameter was smaller.{{cite web|title=Moon Distances for London, United Kingdom, England|url=https://www.timeanddate.com/astronomy/moon/distance.html?year=1947&n=136|publisher=timeanddate|access-date=20 December 2024}}

Visibility

The eclipse was completely visible over east and southern Africa, west, central, and south Asia, western Australia, and Antarctica, seen rising over Europe, west Africa, and eastern South America and setting over east Asia and eastern Australia.{{cite web|title=Partial Lunar Eclipse of 1947 Jun 03|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot1901/LE1947Jun03P.pdf|publisher=NASA|access-date=20 December 2024}}

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Eclipse details

Shown below is a table displaying details about this particular lunar eclipse. It describes various parameters pertaining to this eclipse.{{cite web|title=Partial Lunar Eclipse of 1947 Jun 03|url=https://eclipsewise.com/lunar/LEprime/1901-2000/LE1947Jun03Pprime.html|publisher=EclipseWise.com|access-date=20 December 2024}}

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|+June 3, 1947 Lunar Eclipse Parameters

! Parameter

! Value

Penumbral Magnitude

| 1.08185

Umbral Magnitude

| 0.02016

Gamma

| −0.98496

Sun Right Ascension

| 04h43m31.4s

Sun Declination

| +22°17'00.3"

Sun Semi-Diameter

| 15'46.0"

Sun Equatorial Horizontal Parallax

| 08.7"

Moon Right Ascension

| 16h42m38.4s

Moon Declination

| -23°09'16.1"

Moon Semi-Diameter

| 14'51.0"

Moon Equatorial Horizontal Parallax

| 0°54'30.0"

ΔT

| 28.0 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.

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|+ Eclipse season of May–June 1947

! May 20
Ascending node (new moon) !! June 3
Descending node (full moon)

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| Total solar eclipse
Solar Saros 127

Partial lunar eclipse
Lunar Saros 139

Related eclipses

= Eclipses in 1947 =

A total solar eclipse on May 20.
A partial lunar eclipse on June 3.
An annular solar eclipse on November 12.
A penumbral lunar eclipse on November 28.

= Metonic =

Preceded by: Lunar eclipse of August 15, 1943
Followed by: Lunar eclipse of March 23, 1951

= Tzolkinex =

Preceded by: Lunar eclipse of April 22, 1940
Followed by: Lunar eclipse of July 16, 1954

= Half-Saros =

Preceded by: Solar eclipse of May 29, 1938
Followed by: Solar eclipse of June 8, 1956

= Tritos =

Preceded by: Lunar eclipse of July 4, 1936
Followed by: Lunar eclipse of May 3, 1958

= Lunar Saros 139 =

Preceded by: Lunar eclipse of May 23, 1929
Followed by: Lunar eclipse of June 14, 1965

= Inex =

Preceded by: Lunar eclipse of June 24, 1918
Followed by: Lunar eclipse of May 13, 1976

= Triad =

Preceded by: Lunar eclipse of August 1, 1860
Followed by: Lunar eclipse of April 3, 2034

= Lunar eclipses of 1944–1947 =

= Saros 139 =

= Tritos series =

= Inex series =

= Half-Saros cycle =

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros This lunar eclipse is related to two total solar eclipses of Solar Saros 146.

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