June 1991 lunar eclipse

A penumbral lunar eclipse took place on Thursday, June 27, 1991, the second of four lunar eclipses in 1991. The moon entered the Earth's penumbra for about 3 hours, and was difficult to see. This lunar eclipse is the predecessor of the Solar eclipse of July 11, 1991.

Visibility

Eclipses of 1991

Saros series

This eclipse is a member of Saros series 110. The previous event occurred on June 15, 1973. The next event was on July 7, 2009.

Lunar year series
Lunar eclipse series sets from 1991–1994
Ascending node   Descending node
Saros Date
Viewing		 Type
Chart		 Gamma Saros Date
Viewing		 Type
Chart		 Gamma
110 1991 Jun 27
 Penumbral
 −1.40641 115 1991 Dec 21
 Partial
 0.97094
120 1992 Jun 15
 Partial
 −0.62887 125
 1992 Dec 9
 Total
 0.31438
130 1993 Jun 4
 Total
 0.16376 135
 1993 Nov 29
 Total
 −0.39941
140 1994 May 25
 Partial
 0.89334 145 1994 Nov 18
 Penumbral
 −1.10479
Last set 1991 Jul 26 Last set 1991 Jan 30
Next set 1995 Apr 15 Next set 1995 Oct 08

Metonic series

The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the earth's shadow will be in nearly the same location relative to the background stars.

Ascending node Descending node
  1. 1991 Jun 27 - penumbral (110)
  2. 2010 Jun 26 - partial (120)
  3. 2029 Jun 26 - total (130)
  4. 2048 Jun 26 - partial (140)
  5. 2067 Jun 27 - penumbral (150)
  1. 1991 Dec 21 - partial (115)
  2. 2010 Dec 21 - total (125)
  3. 2029 Dec 20 - total (135)
  4. 2048 Dec 20 - partial (145)

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[1] This lunar eclipse is related to two partial solar eclipses of Solar Saros 117.

June 21, 1982 July 1, 2000

See also

References
  1. Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros


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