Solar Eclipse Prime Page

Hybrid Solar Eclipse of 1930 Apr 28

Fred Espenak

Key to Solar Eclipse Figure (below)

Introduction


The Hybrid Solar Eclipse of 1930 Apr 28 is visible from the following geographic regions:

  • Partial Eclipse: North America, northeast Asia
  • Hybrid Eclipse: U.S., Canada

The map to the right depicts the geographic regions of eclipse visibility. Click on the map to enlarge it. For an explanation of the features appearing in the map, see Key to Solar Eclipse Maps.

The instant of greatest eclipse takes place on 1930 Apr 28 at 19:03:34 TD (19:03:10 UT1). This is 6.0 days before the Moon reaches perigee. During the eclipse, the Sun is in the constellation Aries. The synodic month in which the eclipse takes place has a Brown Lunation Number of 91.

The eclipse belongs to Saros 137 and is number 31 of 70 eclipses in the series. All eclipses in this series occur at the Moon’s ascending node. The Moon moves southward with respect to the node with each succeeding eclipse in the series and gamma decreases.

The solar eclipse of 1930 Apr 28 is one of the rare hybrid solar eclipses. In this particular case the eclipse path starts out as annular. Further down the track it changes to total and then back to annular before the path ends. It is a very short hybrid eclipse with a duration at greatest eclipse of 00m01s. The eclipse magnitude is 1.0003, while Gamma has a value of 0.4730.

The hybrid solar eclipse of 1930 Apr 28 is preceded two weeks earlier by a partial lunar eclipse on 1930 Apr 13.

These eclipses all take place during a single eclipse season.

The eclipse predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 24.0 seconds for this eclipse.

The following links provide maps and data for the eclipse.

Eclipse Data: Hybrid Solar Eclipse of 1930 Apr 28

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 1.00026
Eclipse Obscuration 1.00053
Gamma 0.47305
Conjunction Times
Event Calendar Date and Time Julian Date
Greatest Eclipse 1930 Apr 28 at 19:03:34.0 TD (19:03:10.0 UT1) 2426095.293866
Ecliptic Conjunction 1930 Apr 28 at 19:08:43.9 TD (19:08:19.9 UT1) 2426095.297453
Equatorial Conjunction 1930 Apr 28 at 19:27:27.4 TD (19:27:03.4 UT1) 2426095.310456
Geocentric Coordinates of Sun and Moon
1930 Apr 28 at 19:03:34.0 TD (19:03:10.0 UT1)
Coordinate Sun Moon
Right Ascension02h21m32.7s02h20m46.1s
Declination+14°06'03.1"+14°30'42.8"
Semi-Diameter 15'52.8" 15'39.8"
Eq. Hor. Parallax 08.7" 0°57'29.0"
Geocentric Libration of Moon
Angle Value
l -5.2°
b -0.5°
c -17.5°
Prediction Parameters
Paramater Value
Ephemerides JPL DE405
ΔT 24.0 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 137 (31/70)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Hybrid Solar Eclipse of 1930 Apr 28

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactP116:20:27.516:20:03.506°40.7'S153°57.7'W
Last External ContactP421:46:24.521:46:00.540°56.6'N044°31.6'W
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N117:06:13.017:05:49.028°00.9'S159°25.1'W
South Extreme Path Limit 1S121:00:56.721:00:32.719°50.6'N040°34.0'W

Explanation of Penumbral Shadow Contacts and Extremes Tables

Umbral Shadow Contacts and Extremes: Hybrid Solar Eclipse of 1930 Apr 28

Contacts of Umbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactU117:25:43.517:25:19.503°25.6'N172°49.4'W
First Internal ContactU217:26:46.117:26:22.103°40.6'N173°08.8'W
Last Internal ContactU320:40:09.220:39:45.250°53.5'N022°33.2'W
Last External ContactU420:41:06.020:40:42.050°40.6'N022°55.9'W
Extreme Northern and Southern Path Limits of Umbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N117:26:32.317:26:08.303°48.8'N173°07.4'W
South Extreme Path Limit 1S117:25:57.417:25:33.403°17.3'N172°50.7'W
North Extreme Path Limit 2N220:40:21.720:39:57.751°00.5'N022°31.6'W
South Extreme Path Limit 2S220:40:53.520:40:29.550°33.5'N022°57.4'W

Explanation of Umbral Shadow Contacts and Extremes Tables

Central Line Extremes and Duration: Hybrid Solar Eclipse of 1930 Apr 28

Extreme Limits of the Central Line
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
Extreme Central Line Limit 1C117:26:14.817:25:50.803°33.0'N172°59.1'W
Extreme Central Line Limit 2C220:40:37.620:40:13.650°47.0'N022°44.6'W

Explanation of Central Line Extremes Table

Greatest Eclipse and Greatest Duration
Event Time
TD
Time
UT1
Latitude Longitude Sun
Altitude
Sun
Azimuth
Path Width Central
Duration
Greatest Eclipse19:03:34.019:03:10.039°24.7'N121°09.6'W 61.6° 148.8° 1.0 km00m01.35s
Greatest Duration17:26:14.817:25:50.803°33.0'N172°59.1'W 0.0° 75.9° 63.9 km00m52.00s

Explanation of Greatest Eclipse and Greatest Duration

Polynomial Besselian Elements: Hybrid Solar Eclipse of 1930 Apr 28

Polynomial Besselian Elements
1930 Apr 28 at 19:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 -0.22612 0.41676 14.0991 0.55018 0.00400 105.6358
1 0.49409 0.22598 0.0126 -0.00012 -0.00012 15.0028
2 0.00006 -0.00009 -0.0000 -0.00001 -0.00001 -0.0000
3 -0.00001 -0.00000 - - - -
Tan ƒ1 0.0046428
Tan ƒ2 0.0046196

At time t1 (decimal hours), each besselian element is evaluated by:

x = x0 + x1*t + x2*t2 + x3*t3 (or x = Σ [xn*tn]; n = 0 to 3)

where: t = t1 - t0 (decimal hours) and t0 = 19.000

Explanation of Polynomial Besselian Elements

Eclipse Publications

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For more visit: AstroPixels Publishing

Links for the Hybrid Solar Eclipse of 1930 Apr 28

Links to Additional Solar Eclipse Information

  • Home - home page of EclipseWise with predictions for both solar and lunar eclipses

Decade Tables of Solar Eclipses:
| 1901 - 1910 | 1911 - 1919 | 1921 - 1930 | 1931 - 1940 | 1941 - 1950 |
| 1951 - 1960 | 1961 - 1970 | 1971 - 1980 | 1981 - 1990 | 1991 - 2000 |
| 2001 - 2010 | 2011 - 2020 | 2021 - 2030 | 2031 - 2040 | 2041 - 2050 |
| 2051 - 2060 | 2061 - 2070 | 2071 - 2080 | 2081 - 2090 | 2091 - 2100 |

Solar Eclipse Publications

Eclipse Publications

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jpeg jpeg
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For more visit: AstroPixels Publishing

Eclipse Predictions

Predictions for the Hybrid Solar Eclipse of 1930 Apr 28 were generated using the JPL DE405 solar and lunar ephemerides. The lunar coordinates were calculated with respect to the Moon's Center of Mass. The predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 24.0 seconds for this eclipse.

Acknowledgments

Some of the content on this website is based on the books 21st Century Canon of Solar Eclipses and Thousand Year Canon of Solar Eclipses 1501 to 2500. All eclipse calculations are by Fred Espenak, and he assumes full responsibility for their accuracy.

Permission is granted to reproduce eclipse data when accompanied by a link to this page and an acknowledgment:

"Eclipse Predictions by Fred Espenak, www.EclipseWise.com"

The use of diagrams and maps is permitted provided that they are NOT altered (except for re-sizing) and the embedded credit line is NOT removed or concealed.