A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Monday, September 4, 1933, with an umbral magnitude of −0.7336. 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 about 3.9 days after perigee (on August 31, 1933, at 6:30 UTC), the Moon's apparent diameter was larger.
This eclipse was the last of four penumbral lunar eclipses in 1933, with the others occurring on February 10, March 12, and August 5.
Visibility The eclipse was completely visible over much of North and South America, seen rising over northwestern North America and the central Pacific Ocean and setting over Africa and Europe.
Eclipse details Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
+September 4, 1933 Lunar Eclipse Parameters Parameter Value Penumbral Magnitude 0.69558 Umbral Magnitude −0.30117 Gamma 1.17763 Sun Right Ascension 10h50m36.8s Sun Declination +07°22'09.8" Sun Semi-Diameter 15'51.8" Sun Equatorial Horizontal Parallax 08.7" Moon Right Ascension 22h48m27.5s Moon Declination -06°21'19.9" Moon Semi-Diameter 15'54.9" Moon Equatorial Horizontal Parallax 0°58'24.5" ΔT 23.9 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. The first and last eclipse in this sequence is separated by one synodic month.
+ Eclipse season of August–September 1933 August 5Ascending node (full moon) August 21Descending node (new moon) September 4Ascending node (full moon) Penumbral lunar eclipseLunar Saros 108 Annular solar eclipseSolar Saros 134 Penumbral lunar eclipseLunar Saros 146
Related eclipses Eclipses in 1933 A penumbral lunar eclipse on February 10. An annular solar eclipse on February 24. A penumbral lunar eclipse on March 12. A penumbral lunar eclipse on August 5. An annular solar eclipse on August 21. A penumbral lunar eclipse on September 4.
Metonic Preceded by: Lunar eclipse of November 17, 1929
Tzolkinex Preceded by: Lunar eclipse of July 25, 1926 Followed by: Lunar eclipse of October 16, 1940
Half-Saros Preceded by: Solar eclipse of August 30, 1924 Followed by: Solar eclipse of September 10, 1942
Tritos Preceded by: Lunar eclipse of October 6, 1922 Followed by: Lunar eclipse of August 4, 1944
Lunar Saros 146 Preceded by: Lunar eclipse of August 24, 1915 Followed by: Lunar eclipse of September 15, 1951
Inex Preceded by: Lunar eclipse of September 24, 1904 Followed by: Lunar eclipse of August 15, 1962
Triad Preceded by: Lunar eclipse of November 3, 1846 Followed by: Lunar eclipse of July 5, 2020
Lunar eclipses of 1930–1933
Saros 146
Tritos series
Series members between 1801 and 2042 1802 Sep 11(Saros 134) 1813 Aug 12(Saros 135) 1824 Jul 11(Saros 136) 1835 Jun 10(Saros 137) 1846 May 11(Saros 138) 1857 Apr 09(Saros 139) 1868 Mar 08(Saros 140) 1879 Feb 07(Saros 141) 1890 Jan 06(Saros 142) 1900 Dec 06(Saros 143) 1911 Nov 06(Saros 144) 1922 Oct 06(Saros 145) 1933 Sep 04(Saros 146) 1944 Aug 04(Saros 147) 2042 Oct 28(Saros 156)
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 153. August 30, 1924September 10, 1942
See also List of lunar eclipses and List of 21st-century lunar eclipses
References
External links Saros series 146