Solar eclipse of July 22, 1990

A total solar eclipse occurred at the Moon's descending node of orbit on Sunday, July 22, 1990, with a magnitude of 1.0391. 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. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Totality was visible in southern Finland including its capital city Helsinki, the Soviet Union (including today's northern Estonia and northern Russia), and eastern Andreanof Islands and Amukta of Alaska.

In Finland, the solar eclipse occurred during sunrise and enabled observation and photography without protective glasses, which was however hampered by strong clouds. The Sun was totally eclipsed in Helsinki began at 06:03:07 local time.

Observations
The Finnish Geodetic Institute conducted a series of measurements for 52 hours to study the changes in gravity using an absolute gravimeter in Helsinki. No abnormal values were recorded. An observation team of the Academy of Sciences of the Soviet Union went to the Solovetsky Islands, Arkhangelsk Oblast in the White Sea, and planned to take images of the corona with different exposure levels and record videos. However, there were clouds at sunrise on the eclipse day, and drizzle continued until noon, so the observation was not successful.

Eclipses in 1990

 * An annular solar eclipse on January 26, 1990.
 * A total lunar eclipse on February 9, 1990.
 * A total solar eclipse on July 22, 1990.
 * A partial lunar eclipse on August 6, 1990.

Metonic

 * Preceded by: Solar eclipse of October 3, 1986
 * Followed by: Solar eclipse of May 10, 1994

Tzolkinex

 * Preceded by: Solar eclipse of June 11, 1983
 * Followed by: Solar eclipse of September 2, 1997

Half-Saros

 * Preceded by: Lunar eclipse of July 17, 1981
 * Followed by: Lunar eclipse of July 28, 1999

Tritos

 * Preceded by: Solar eclipse of August 22, 1979
 * Followed by: Solar eclipse of June 21, 2001

Solar Saros 126

 * Preceded by: Solar eclipse of July 10, 1972
 * Followed by: Solar eclipse of August 1, 2008

Inex

 * Preceded by: Solar eclipse of August 11, 1961
 * Followed by: Solar eclipse of July 2, 2019

Triad

 * Preceded by: Solar eclipse of September 21, 1903
 * Followed by: Solar eclipse of May 22, 2077

Inex series
In the 19th century:


 * Solar Saros 120: Total Solar Eclipse of 1816 Nov 19


 * Solar Saros 121: Hybrid Solar Eclipse of 1845 Oct 30


 * Solar Saros 122: Annular Solar Eclipse of 1874 Oct 10

In the 22nd century:


 * Solar Saros 130: Total Solar Eclipse of 2106 May 03


 * Solar Saros 131: Annular Solar Eclipse of 2135 Apr 13


 * Solar Saros 132: Hybrid Solar Eclipse of 2164 Mar 23


 * Solar Saros 133: Total Solar Eclipse of 2193 Mar 03