A penumbral lunar eclipse took place on Friday, July 26, 1991, the third of four lunar eclipses in 1991. This was the second member of Lunar Saros 148. The previous event was on 15 July 1973, and the first eclipse of the series. The next event was on 6 August 2009.[1]
Visibility
edit
Relations to other lunar eclipses
editEclipses of 1991
edit- 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
editThis eclipse is part of Saros cycle series 148.
Lunar year series
edit| Lunar eclipse series sets from 1988–1991 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros | Date viewing |
Type chart |
Gamma | Saros | Date viewing |
Type chart |
Gamma | |
| 113 | 1988 Mar 03
|
Penumbral
|
0.98855 | 118 | 1988 Aug 27
|
Partial
|
−0.86816 | |
| 123 | 1989 Feb 20
|
Total 
|
0.29347 | 128 | 1989 Aug 17
|
Total
|
−0.14905 | |
| 133 | 1990 Feb 09
|
Total
|
−0.41481 | 138 | 1990 Aug 06
|
Partial
|
0.63741 | |
| 143 | 1991 Jan 30
|
Penumbral
|
−1.07522 | 148 | 1991 Jul 26
|
Penumbral
|
1.43698 | |
| Last set | 1987 Apr 14 | Last set | 1987 Oct 07 | |||||
| Next set | 1991 Dec 21 | Next set | 1991 Jun 27 | |||||
Half-Saros cycle
editA 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 155.
| July 20, 1982 | July 31, 2000 |
|---|---|
|
|
See also
editNotes
edit- ^ Hermit Eclipse: Saros cycle 148
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit- 1991 Jul 26 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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