January 1991 lunar eclipse explained

A penumbral lunar eclipse took place on Wednesday, January 30, 1991, the first of four lunar eclipses in 1991.^[1]

Relations to other lunar eclipses

Eclipses of 1991

• An annular solar eclipse on January 15.
• A penumbral lunar eclipse on January 30.
• A penumbral lunar eclipse on June 27.
• A total solar eclipse on July 11.
• A penumbral lunar eclipse on July 26.
• A partial lunar eclipse on December 21.

Saros series

This eclipse is part of Saros cycle series 143.

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).^[2] This lunar eclipse is related to two partial solar eclipses of Solar Saros 150.

Tzolkinex

• Preceded: Lunar eclipse of December 19, 1983
• Followed: Lunar eclipse of March 13, 1998

See also

• List of lunar eclipses
• List of 20th-century lunar eclipses

Notes and References

1. http://www.hermit.org/Eclipse/gen_stats.cgi?mode=query&page=full&qtype=type&body=L&saros=143 Hermit Eclipse: Saros cycle 143
2. Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros