September 1933 lunar eclipse

Penumbral lunar eclipse September 4 1933

September 1933 lunar eclipsePenumbral eclipse

The Moon's hourly motion shown right to left

Date| September 4, 1933
Gamma| 1.1776
Magnitude| −0.3012
Saros cycle| 146 (6 of 72)
Penumbral| 221 minutes, 24 seconds
| Contacts (UTC)

P1| 3:01:11
Greatest| 4:51:56
P4| 6:42:34

<- August 1933

January 1934 ->

A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Monday, September 4, 1933,[1] 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.[2]

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

[edit]

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.[3]

## Eclipse details

[edit]

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]

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

[edit]

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 August–September 1933  August 5
Ascending node (full moon) | August 21
Descending node (new moon) | September 4
Ascending node (full moon)

|
|

|  |
Penumbral lunar eclipse
Lunar Saros 108 | Annular solar eclipse
Solar Saros 134 | Penumbral lunar eclipse
Lunar Saros 146

## Related eclipses

[edit]

### Eclipses in 1933

[edit]

* 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

[edit]

* Preceded by: Lunar eclipse of November 17, 1929

### Tzolkinex

[edit]

* Preceded by: Lunar eclipse of July 25, 1926
* Followed by: Lunar eclipse of October 16, 1940

### Half-Saros

[edit]

* Preceded by: Solar eclipse of August 30, 1924
* Followed by: Solar eclipse of September 10, 1942

### Tritos

[edit]

* Preceded by: Lunar eclipse of October 6, 1922
* Followed by: Lunar eclipse of August 4, 1944

### Lunar Saros 146

[edit]

* Preceded by: Lunar eclipse of August 24, 1915
* Followed by: Lunar eclipse of September 15, 1951

### Inex

[edit]

* Preceded by: Lunar eclipse of September 24, 1904
* Followed by: Lunar eclipse of August 15, 1962

### Triad

[edit]

* Preceded by: Lunar eclipse of November 3, 1846
* Followed by: Lunar eclipse of July 5, 2020

### Lunar eclipses of 1930–1933

[edit]

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.[5]

The penumbral lunar eclipses on February 10, 1933 and August 5, 1933 occur in the next lunar year eclipse set.

Lunar eclipse series sets from 1930 to 1933

Descending node  |  | Ascending node
Saros | Date
Viewing  | Type
Chart  | Gamma | Saros  | Date
Viewing  | Type
Chart  | Gamma
111  | 1930 Apr 13
| Partial
| 0.9545  | 116  | 1930 Oct 07
| Partial
| −0.9812
121  | 1931 Apr 02
| Total
| 0.2043  | 126  | 1931 Sep 26
| Total
| −0.2698
131  | 1932 Mar 22
| Partial
| −0.4956  | 136  | 1932 Sep 14
| Partial
| 0.4664
141  | 1933 Mar 12
| Penumbral
| −1.2369  | 146  | 1933 Sep 04
| Penumbral
| 1.1776

### Saros 146

[edit]

This eclipse is a part of Saros series 146, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on July 11, 1843. It contains partial eclipses from October 17, 2005 through May 14, 2348; total eclipses from May 25, 2366 through November 16, 2654; and a second set of partial eclipses from November 27, 2672 through June 12, 2997. The series ends at member 72 as a penumbral eclipse on August 29, 3123.

The longest duration of totality will be produced by member 37 at 99 minutes, 22 seconds on August 8, 2492. All eclipses in this series occur at the Moon’s ascending node of orbit.[6]

Greatest  | First

|

The greatest eclipse of the series will occur on 2492 Aug 08, lasting 99 minutes, 22 seconds.[7] | Penumbral  | Partial  | Total  | Central
1843 Jul 11
| 2005 Oct 17
| 2366 May 25
| 2438 Jul 07

Last
Central  | Total  | Partial  | Penumbral
2546 Sep 11
| 2654 Nov 16
| 2997 Jun 12
| 3123 Aug 29

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 1–20 occur between 1843 and 2200:

1  | 2  | 3
1843 Jul 11 | 1861 Jul 21 | 1879 Aug 02
|  |  |  |  |
4  | 5  | 6
1897 Aug 12 | 1915 Aug 24 | 1933 Sep 04
|  |  |  |  |
7  | 8  | 9
1951 Sep 15 | 1969 Sep 25 | 1987 Oct 07
|  |  |  |  |
10  | 11  | 12
2005 Oct 17 | 2023 Oct 28 | 2041 Nov 08
|  |  |  |  |
13  | 14  | 15
2059 Nov 19 | 2077 Nov 29 | 2095 Dec 11
|  |  |  |  |
16  | 17  | 18
2113 Dec 22 | 2132 Jan 02 | 2150 Jan 13
|  |  |  |  |
19  | 20
2168 Jan 24 | 2186 Feb 04
|  |  |

### Half-Saros cycle

[edit]

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[8] This lunar eclipse is related to two total solar eclipses of Solar Saros 153.

August 30, 1924 | September 10, 1942

|

## See also

[edit]

* List of lunar eclipses and List of 21st-century lunar eclipses

## References

[edit]

1. ^ "September 3–4, 1933 Penumbral Lunar Eclipse". timeanddate. Retrieved 16 December 2024.
2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 16 December 2024.
3. ^ "Penumbral Lunar Eclipse of 1933 Sep 04" (PDF). NASA. Retrieved 16 December 2024.
4. ^ "Penumbral Lunar Eclipse of 1933 Sep 04". EclipseWise.com. Retrieved 16 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 146". eclipse.gsfc.nasa.gov.
7. ^ Listing of Eclipses of series 146
8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

## External links

[edit]

* Saros series 146
* 1933 Sep 04 chart Eclipse Predictions by Fred Espenak, NASA/GSFC

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Partial eclipses

* 1453 May
* 1903 Apr
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* 2041 May
* 2041 Nov
* 2046 Jan
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* 2048 Jun
* 2052 Oct
* 2055 Aug
* 2075 Jun
* 2099 Apr

Total eclipses

* 1504 Mar
* 1573 Dec
* 1859 Aug
* 1910 May
* 1913 Sep
* 1920 May
* 1921 Apr
* 1928 Jun
* 1931 Apr
* 1931 Sep
* 1935 Jan
* 1935 Jul
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* → 2025 Mar
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* 2032 Apr
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* 2036 Feb
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* 2040 May
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* 2043 Mar
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* 2044 Mar
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* 2047 Jan
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* 2048 Jan
* 2050 May
* 2050 Oct
* 2051 Apr
* 2051 Oct
* 2054 Feb
* 2054 Aug
* 2055 Feb
* 2058 Jun
* 2065 Jul
* 2069 May
* 2072 Aug
* 2076 Jun
* 2083 Jul
* 2084 Jan
* 2087 May
* 2090 Sep
* 2094 Jun
* 2123 Jun
* 2170 May

Penumbral eclipses

| Partial|

* 1933 Feb 10
* 1933 Mar 12
* 1933 Aug 05
* 1933 Sep 04
* 1936 Dec 28
* 1937 May 25
* 1940 Mar 23
* 1940 Apr 22
* 1940 Oct 16
* 1944 Feb 09
* 1944 Jul 06
* 1944 Aug 04
* 1947 Nov 28
* 1951 Feb 21
* 1951 Mar 23
* 1951 Aug 17
* 1951 Sep 15
* 1955 Jan 08
* 1955 Jun 05
* 1958 Apr 04
* 1958 Oct 27
* 1959 Sep 17
* 1962 Feb 19
* 1962 Jul 17
* 1962 Aug 15
* 1965 Dec 08
* 1966 May 04
* 1966 Oct 29
* 1969 Apr 02
* 1969 Aug 27
* 1969 Sep 25
* 1973 Jan 18
* 1973 Jun 15
* 1973 Jul 15
* 1976 Nov 06
* 1977 Sep 27
* 1980 Mar 01
* 1980 Jul 27
* 1980 Aug 26
* 1983 Dec 20
* 1984 May 15
* 1984 Jun 13
* 1984 Nov 08
* 1987 Apr 14
* 1987 Oct 07
* 1991 Jan 30
* 1991 Jun 27
* 1991 Jul 26
* 1994 Nov 18
* 1995 Oct 08
* 1998 Mar 13
* 1998 Aug 08
* 1998 Sep 06
* 2001 Dec 30
* 2002 May 26
* 2002 Jun 24
* 2002 Nov 20
* 2005 Apr 24
* 2009 Feb 09
* 2009 Jul 07
* 2009 Aug 06
* 2012 Nov 28
* 2013 May 25
* 2013 Oct 18
* 2016 Mar 23
* 2016 Aug 18
* 2016 Sep 16
* 2017 Feb 11
* 2020 Jan 10
* 2020 Jun 05
* 2020 Jul 05
* 2020 Nov 30
* 2023 May 05
* 2024 Mar 25
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* 2027 Jul 18
* 2027 Aug 17
* 2030 Dec 09
* 2031 May 07
* 2031 Jun 05
* 2031 Oct 30
* 2034 Apr 03
* 2035 Feb 22
* 2038 Jan 21
* 2038 Jun 17
* 2038 Jul 16
* 2038 Dec 11
* 2042 Apr 05
* 2042 Oct 28
* 2045 Mar 03
* 2045 Aug 27
* 2048 Dec 20
* 2049 May 17
* 2049 Jun 15
* 2049 Nov 09
* 2052 Apr 14
* 2053 Mar 04
* 2060 Nov 08
* 2107 May 7

|

Total|

* 1944 Dec 29
* 1948 Oct 18
* 1963 Jan 09
* 1981 Jan 20
* 1988 Mar 03
* 1999 Jan 31
* 2006 Mar 14
* → 2053 Aug 29

Related|

* Danjon scale
* Eclipse cycle
* Eclipse season
* Eclipses in mythology and culture
* Gamma
* Solar eclipse

* Category
* → symbol denotes next eclipse in series

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