Solar Eclipse Prime Page

Hybrid Solar Eclipse of 1908 Dec 23

Fred Espenak

Introduction


The Hybrid Solar Eclipse of 1908 Dec 23 is visible from the following geographic regions:

  • Partial Eclipse: South America, Antarctica, south Africa
  • Hybrid Eclipse: Chile, Argentina, Uruguay, south Atlantic

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 1908 Dec 23 at 11:44:28 TD (11:44:19 UT1). This is 3.1 days before the Moon reaches perigee. During the eclipse, the Sun is in the constellation Sagittarius. The synodic month in which the eclipse takes place has a Brown Lunation Number of -173.

The eclipse belongs to Saros 140 and is number 23 of 71 eclipses in the series. All eclipses in this series occur at the Moon’s descending node. The Moon moves northward with respect to the node with each succeeding eclipse in the series and gamma increases.

The solar eclipse of 1908 Dec 23 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 00m12s. The eclipse magnitude is 1.0024, while Gamma has a value of -0.4985.

The hybrid solar eclipse of 1908 Dec 23 is preceded two weeks earlier by a penumbral lunar eclipse on 1908 Dec 07.

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 9.0 seconds for this eclipse.

The following links provide maps and data for the eclipse.

The tables below contain detailed predictions and additional information on the Hybrid Solar Eclipse of 1908 Dec 23 .


Eclipse Data: Hybrid Solar Eclipse of 1908 Dec 23

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 1.00243
Eclipse Obscuration 1.00486
Gamma-0.49845
Conjunction Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 1908 Dec 23 at 11:44:27.5 TD (11:44:18.6 UT1) 2418298.989104
Ecliptic Conjunction 1908 Dec 23 at 11:49:46.1 TD (11:49:37.1 UT1) 2418298.992791
Equatorial Conjunction 1908 Dec 23 at 11:49:14.3 TD (11:49:05.3 UT1) 2418298.992423
Geocentric Coordinates of Sun and Moon
1908 Dec 23 at 11:44:27.5 TD (11:44:18.6 UT1)
Coordinate Sun Moon
Right Ascension18h05m35.3s18h05m23.9s
Declination-23°26'42.1"-23°55'54.7"
Semi-Diameter 16'15.7" 16'04.3"
Eq. Hor. Parallax 08.9" 0°58'59.0"
Geocentric Libration of Moon
Angle Value
l -4.5°
b 0.6°
c -2.1°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE406
ΔT 9.0 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 140 (23/71)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Hybrid Solar Eclipse of 1908 Dec 23

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactP109:06:26.909:06:17.912°32.5'S052°20.2'W
Last External ContactP414:22:20.614:22:11.621°50.9'S064°15.4'E
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N109:45:45.909:45:37.006°55.7'N053°36.4'W
South Extreme Path Limit 1S113:43:06.613:42:57.602°29.0'S065°07.8'E

Explanation of Penumbral Shadow Contacts and Extremes Tables

Umbral Shadow Contacts and Extremes: Hybrid Solar Eclipse of 1908 Dec 23

Contacts of Umbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactU110:10:43.810:10:34.822°37.8'S073°16.9'W
First Internal ContactU210:11:37.110:11:28.122°50.6'S073°36.9'W
Last Internal ContactU313:17:16.813:17:07.831°58.2'S086°12.5'E
Last External ContactU413:18:04.913:17:56.031°46.8'S085°53.4'E
Extreme Northern and Southern Path Limits of Umbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N110:10:53.810:10:44.922°31.5'S073°16.2'W
South Extreme Path Limit 1S110:11:27.010:11:18.122°56.9'S073°37.7'W
North Extreme Path Limit 2N213:17:55.913:17:46.931°41.2'S085°52.2'E
South Extreme Path Limit 2S213:17:25.913:17:16.932°03.7'S086°13.8'E

Explanation of Umbral Shadow Contacts and Extremes Tables

Central Line Extremes and Duration: Hybrid Solar Eclipse of 1908 Dec 23

Extreme Limits of the Central Line
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
Extreme Central Line Limit 1C110:11:10.410:11:01.422°44.2'S073°26.9'W
Extreme Central Line Limit 2C213:17:40.913:17:31.931°52.5'S086°03.0'E

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 Eclipse11:44:27.511:44:18.653°25.4'S000°34.7'W 59.8° 7.8° 9.8 km00m11.82s
Greatest Duration10:11:10.410:11:01.422°44.2'S073°26.9'W 0.0° 115.6° 58.1 km00m41.74s

Explanation of Greatest Eclipse and Greatest Duration

Polynomial Besselian Elements: Hybrid Solar Eclipse of 1908 Dec 23

Polynomial Besselian Elements
1908 Dec 23 at 12:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 0.09959 -0.50929 -23.4437 0.54957 0.00340 0.2154
1 0.55526 -0.04936 0.0005 -0.00012 -0.00012 14.9963
2 0.00003 0.00020 0.0000 -0.00001 -0.00001 0.0000
3 -0.00001 0.00000 - - - -
Tan ƒ1 0.0047542
Tan ƒ2 0.0047305

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 = 12.000

Explanation of Polynomial Besselian Elements

Links for the Hybrid Solar Eclipse of 1908 Dec 23

Links to Additional Solar Eclipse Information

Eclipse Predictions

Predictions for the Hybrid Solar Eclipse of 1908 Dec 23 were generated using the JPL DE406 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 9.0 seconds for this eclipse.

Acknowledgments

Some of the content on this website is based on the book 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 covered.