Template:Solar Inex series 2021 December 4
This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.
| Series members between 1801 and 2200 | ||
|---|---|---|
 April 24, 1819 (Saros 145) |
 April 3, 1848 (Saros 146) |
 March 15, 1877 (Saros 147) |
 February 23, 1906 (Saros 148) |
 February 3, 1935 (Saros 149) |
 January 14, 1964 (Saros 150) |
 December 24, 1992 (Saros 151) |
 December 4, 2021 (Saros 152) |
 November 14, 2050 (Saros 153) |
 October 24, 2079 (Saros 154) |
 October 5, 2108 (Saros 155) |
 September 15, 2137 (Saros 156) |
 August 25, 2166 (Saros 157) |
 August 5, 2195 (Saros 158) |
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