July 1954 lunar eclipse

{{Infobox lunar eclipse

| type = partial

| image = Lunar eclipse chart close-1954Jul16.png

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

| date = July 16, 1954

| gamma = 0.7877

| magnitude = 0.4054

| saros_ser = 138

| saros_no = 26 of 83

| partiality = 140 minutes, 55 seconds

| penumbral = 301 minutes, 37 seconds

| p1 = 21:49:33

| u1 = 23:09:58

| greatest = 0:20:20

| u4 = 1:30:53

| p4 = 2:51:10

| previous = January 1954

| next = January 1955

}}

A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Friday, July 16, 1954,{{cite web|title=July 15–16, 1954 Partial Lunar Eclipse|url=https://www.timeanddate.com/eclipse/lunar/1954-july-16|publisher=timeanddate|access-date=22 December 2024}} with an umbral magnitude of 0.4054. 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. The Moon's apparent diameter was near the average diameter because it occurred 6.6 days after apogee (on July 9, 1954, at 9:25 UTC) and 7.8 days before perigee (on July 23, 1954, at 19:30 UTC).{{cite web|title=Moon Distances for London, United Kingdom, England|url=https://www.timeanddate.com/astronomy/moon/distance.html?year=1954&n=136|publisher=timeanddate|access-date=22 December 2024}}

Visibility

The eclipse was completely visible over eastern South America, Africa, Europe, and Antarctica, seen rising over northwestern South America and much of central and eastern North America and setting over eastern Europe, the western half of Asia, and western Australia.{{cite web|title=Partial Lunar Eclipse of 1954 Jul 16|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot1951/LE1954Jul16P.pdf|publisher=NASA|access-date=22 December 2024}}

class=wikitable

|300px 300px

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 1954 Jul 16|url=https://eclipsewise.com/lunar/LEprime/1901-2000/LE1954Jul16Pprime.html|publisher=EclipseWise.com|access-date=22 December 2024}}

class="wikitable" align="{{{align|left}}}" style="margin:{{#ifeq:{{{align}}}|right|0 0 0.5em 1em|0 1em 0.5em 0}}"

|+July 16, 1954 Lunar Eclipse Parameters

! Parameter

! Value

Penumbral Magnitude

| 1.42024

Umbral Magnitude

| 0.40537

Gamma

| 0.78767

Sun Right Ascension

| 07h39m05.3s

Sun Declination

| +21°29'36.6"

Sun Semi-Diameter

| 15'44.2"

Sun Equatorial Horizontal Parallax

| 08.7"

Moon Right Ascension

| 19h38m14.9s

Moon Declination

| -20°46'21.3"

Moon Semi-Diameter

| 15'30.4"

Moon Equatorial Horizontal Parallax

| 0°56'54.4"

ΔT

| 30.9 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.

class="wikitable"

|+ Eclipse season of June–July 1954

! June 30
Descending node (new moon)

July 16
Ascending node (full moon)

200px

align=center

| Total solar eclipse
Solar Saros 126

Partial lunar eclipse
Lunar Saros 138

Related eclipses

= Eclipses in 1954 =

An annular solar eclipse on January 5.
A total lunar eclipse on January 19.
A total solar eclipse on June 30.
A partial lunar eclipse on July 16.
An annular solar eclipse on December 25.

= Metonic =

Preceded by: Lunar eclipse of September 26, 1950
Followed by: Lunar eclipse of May 3, 1958

= Tzolkinex =

Preceded by: Lunar eclipse of June 3, 1947
Followed by: Lunar eclipse of August 26, 1961

= Half-Saros =

Preceded by: Solar eclipse of July 9, 1945
Followed by: Solar eclipse of July 20, 1963

= Tritos =

Preceded by: Lunar eclipse of August 15, 1943
Followed by: Lunar eclipse of June 14, 1965

= Lunar Saros 138 =

Preceded by: Lunar eclipse of July 4, 1936
Followed by: Lunar eclipse of July 26, 1972

= Inex =

Preceded by: Lunar eclipse of August 4, 1925
Followed by: Lunar eclipse of June 25, 1983

= Triad =

Preceded by: Lunar eclipse of September 14, 1867
Followed by: Lunar eclipse of May 16, 2041

= Lunar eclipses of 1951–1955 =

= Saros 138 =

= 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 145.

class=wikitable