Solar Eclipse Prime Page

Total Solar Eclipse of 1990 Jul 22

Fred Espenak

Introduction


The Total Solar Eclipse of 1990 Jul 22 is visible from the following geographic regions:

  • Partial Eclipse: north & central Asia, northwest North America
  • Total Eclipse: Finland, north Russia, north Pacific

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 1990 Jul 22 at 03:03:07 TD (03:02:10 UT1). This is 2.7 days after the Moon reaches perigee. During the eclipse, the Sun is in the constellation Cancer. The synodic month in which the eclipse takes place has a Brown Lunation Number of 836.

The eclipse belongs to Saros 126 and is number 46 of 72 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 total solar eclipse of 1990 Jul 22 is followed two weeks later by a partial lunar eclipse on 1990 Aug 06.

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 57.2 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 Total Solar Eclipse of 1990 Jul 22 .


Eclipse Data: Total Solar Eclipse of 1990 Jul 22

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 1.03908
Eclipse Obscuration 1.07968
Gamma 0.75972
Conjunction Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 1990 Jul 22 at 03:03:07.3 TD (03:02:10.1 UT1) 2448094.626506
Ecliptic Conjunction 1990 Jul 22 at 02:55:15.0 TD (02:54:17.8 UT1) 2448094.621039
Equatorial Conjunction 1990 Jul 22 at 02:37:42.8 TD (02:36:45.6 UT1) 2448094.608861
Geocentric Coordinates of Sun and Moon
1990 Jul 22 at 03:03:07.3 TD (03:02:10.1 UT1)
Coordinate Sun Moon
Right Ascension08h04m51.4s08h05m49.3s
Declination+20°20'48.2"+21°03'44.2"
Semi-Diameter 15'44.5" 16'11.1"
Eq. Hor. Parallax 08.7" 0°59'24.2"
Geocentric Libration of Moon
Angle Value
l 4.3°
b -0.9°
c 10.5°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE406
ΔT 57.2 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 126 (46/72)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Total Solar Eclipse of 1990 Jul 22

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactP100:40:59.900:40:02.743°28.3'N060°59.4'E
Last External ContactP405:25:30.205:24:32.911°22.9'N165°15.7'W
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N101:10:55.301:09:58.128°37.4'N062°25.6'E
South Extreme Path Limit 1S104:55:27.804:54:30.604°07.4'S163°33.5'W

Explanation of Penumbral Shadow Contacts and Extremes Tables

Umbral Shadow Contacts and Extremes: Total Solar Eclipse of 1990 Jul 22

Contacts of Umbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactU101:53:08.501:52:11.259°25.2'N024°40.0'E
First Internal ContactU201:55:35.501:54:38.360°08.8'N022°40.5'E
Last Internal ContactU304:10:58.304:10:01.130°23.8'N138°20.8'W
Last External ContactU404:13:20.404:12:23.229°30.3'N139°23.4'W
Extreme Northern and Southern Path Limits of Umbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N101:55:22.501:54:25.360°15.3'N022°30.9'E
South Extreme Path Limit 1S101:53:22.001:52:24.759°18.4'N024°49.2'E
North Extreme Path Limit 2N204:11:10.904:10:13.630°32.0'N138°19.8'W
South Extreme Path Limit 2S204:13:07.304:12:10.029°21.9'N139°24.3'W

Explanation of Umbral Shadow Contacts and Extremes Tables

Central Line Extremes and Duration: Total Solar Eclipse of 1990 Jul 22

Extreme Limits of the Central Line
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
Extreme Central Line Limit 1C101:54:21.601:53:24.459°46.8'N023°41.3'E
Extreme Central Line Limit 2C204:12:09.704:11:12.529°56.8'N138°52.4'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 Eclipse03:03:07.303:02:10.165°11.2'N168°37.1'E 40.3° 221.7° 201.4 km02m32.61s
Greatest Duration03:00:36.602:59:39.466°05.1'N167°02.3'E 40.2° 218.4° 200.8 km02m32.67s

Explanation of Greatest Eclipse and Greatest Duration

Polynomial Besselian Elements: Total Solar Eclipse of 1990 Jul 22

Polynomial Besselian Elements
1990 Jul 22 at 03:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 0.19994 0.73352 20.3454 0.53880 -0.00732 223.3998
1 0.53828 -0.16930 -0.0078 0.00011 0.00011 15.0009
2 -0.00007 -0.00017 -0.0000 -0.00001 -0.00001 0.0000
3 -0.00001 0.00000 - - - -
Tan ƒ1 0.0046017
Tan ƒ2 0.0045788

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 = 3.000

Explanation of Polynomial Besselian Elements

Links for the Total Solar Eclipse of 1990 Jul 22

Links to Additional Solar Eclipse Information

Eclipse Predictions

Predictions for the Total Solar Eclipse of 1990 Jul 22 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 57.2 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.