Solar eclipse of July 20, 1925
Template:Short description Script error: No such module "Solar eclipse". An annular solar eclipse occurred at the Moon's ascending node of orbit between Monday, July 20 and Tuesday, July 21, 1925,[1] with a magnitude of 0.9436. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Occurring about 8 hours after apogee (on July 20, 1925, at 13:30 UTC), the Moon's apparent diameter was smaller.[2]
Annularity was visible from northern part of Northland Region and the whole Kermadec Islands in New Zealand on July 21 (Tuesday), and Rapa Iti in French Polynesia on July 20 (Monday). A partial eclipse was visible for parts of Eastern Australia and Oceania.
Eclipse details
Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.[3]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1925 July 20 at 19:03:41.7 UTC |
| First Umbral External Contact | 1925 July 20 at 20:23:08.9 UTC |
| First Central Line | 1925 July 20 at 20:26:27.5 UTC |
| First Umbral Internal Contact | 1925 July 20 at 20:29:50.5 UTC |
| Ecliptic Conjunction | 1925 July 20 at 21:40:09.2 UTC |
| Greatest Duration | 1925 July 20 at 21:46:03.5 UTC |
| Greatest Eclipse | 1925 July 20 at 21:48:41.6 UTC |
| Equatorial Conjunction | 1925 July 20 at 21:57:08.7 UTC |
| Last Umbral Internal Contact | 1925 July 20 at 23:07:26.9 UTC |
| Last Central Line | 1925 July 20 at 23:10:49.8 UTC |
| Last Umbral External Contact | 1925 July 20 at 23:14:08.3 UTC |
| Last Penumbral External Contact | 1925 July 21 at 00:33:37.3 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.94358 |
| Eclipse Obscuration | 0.89035 |
| Gamma | −0.71927 |
| Sun Right Ascension | 07h58m46.0s |
| Sun Declination | +20°38'42.8" |
| Sun Semi-Diameter | 15'44.4" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 07h58m29.8s |
| Moon Declination | +20°00'11.9" |
| Moon Semi-Diameter | 14'42.0" |
| Moon Equatorial Horizontal Parallax | 0°53'57.1" |
| ΔT | 23.7 s |
Eclipse season
Script error: No such module "Labelled list hatnote". 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.
| July 20 Ascending node (new moon) |
August 4 Descending node (full moon) |
|---|---|
| File:SE1925Jul20A.png | File:Lunar eclipse chart close-1925Aug04.png |
| Annular solar eclipse Solar Saros 125 |
Partial lunar eclipse Lunar Saros 137 |
Related eclipses
Eclipses in 1925
- A total solar eclipse on January 24.
- A partial lunar eclipse on February 8.
- An annular solar eclipse on July 20.
- A partial lunar eclipse on August 4.
Metonic
- Preceded by: Solar eclipse of October 1, 1921
- Followed by: Solar eclipse of May 9, 1929
Tzolkinex
- Preceded by: Solar eclipse of June 8, 1918
- Followed by: Solar eclipse of August 31, 1932
Half-Saros
- Preceded by: Lunar eclipse of July 15, 1916
- Followed by: Lunar eclipse of July 26, 1934
Tritos
- Preceded by: Solar eclipse of August 21, 1914
- Followed by: Solar eclipse of June 19, 1936
Solar Saros 125
- Preceded by: Solar eclipse of July 10, 1907
- Followed by: Solar eclipse of August 1, 1943
Inex
- Preceded by: Solar eclipse of August 9, 1896
- Followed by: Solar eclipse of June 30, 1954
Triad
- Preceded by: Solar eclipse of September 18, 1838
- Followed by: Solar eclipse of May 20, 2012
Solar eclipses of 1924–1928
This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[4]
The partial solar eclipses on March 5, 1924 and August 30, 1924 occur in the previous lunar year eclipse set, and the solar eclipses on May 19, 1928 and November 12, 1928 occur in the next lunar year eclipse set.
| Solar eclipse series sets from 1924 to 1928 | ||||||
|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 115 | July 31, 1924 File:SE1924Jul31P.png Partial |
−1.4459 | 120 | January 24, 1925 File:SE1925Jan24T.png Total |
0.8661 | |
| 125 | July 20, 1925 File:SE1925Jul20A.png Annular |
−0.7193 | 130 File:Solar eclipse of 1926-01-14, John A. Miller.jpg Totality in Sumatra, Indonesia |
January 14, 1926 File:SE1926Jan14T.png Total |
0.1973 | |
| 135 | July 9, 1926 File:SE1926Jul09A.png Annular |
0.0538 | 140 | January 3, 1927 File:SE1927Jan03A.png Annular |
−0.4956 | |
| 145 | June 29, 1927 File:SE1927Jun29T.png Total |
0.8163 | 150 | December 24, 1927 File:SE1927Dec24P.png Partial |
−1.2416 | |
| 155 | June 17, 1928 File:SE1928Jun17P.png Partial |
1.5107 | ||||
Saros 125
Template:Solar Saros series 125
Metonic series
Template:Solar Metonic series 1898–1982
Tritos series
Template:Solar Tritos series 2001 December 14
Inex series
Template:Solar Inex series 2012 May 20
Notes
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References
- Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
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