A penumbral lunar eclipse took place on Tuesday, May 15, 1984, the first of three lunar eclipses in 1984. This was a deep penumbral eclipse, with the southern limb of the Moon close to the Earth's shadow.
| Penumbral eclipse | |||||||||
| Date | 15 May 1984 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Gamma | 1.11308 | ||||||||
| Magnitude | 0.80710 | ||||||||
| Saros cycle | 111 (65 of 71) | ||||||||
| Penumbral | 232 minutes, 35.8 seconds | ||||||||
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This was the first eclipse of 1984 (first of three penumbral lunar eclipses). The second occurred on June 13th, and the third occurred on November 8th.[1]
Visibility
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Related eclipses
editEclipses of 1984
edit- A penumbral lunar eclipse on May 15.
- An annular solar eclipse on May 30.
- A penumbral lunar eclipse on June 13.
- A penumbral lunar eclipse on November 8.
- A total solar eclipse on November 22.
Lunar year series
edit| Lunar eclipse series sets from 1984–1987 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros | Date Viewing |
Type Chart |
Gamma | Saros | Date Viewing |
Type Chart |
Gamma | |
| 111 | 1984 May 15
|
Penumbral
|
1.11308 | 116 | 1984 Nov 08
|
Penumbral
|
−1.08998 | |
| 121 | 1985 May 04
|
Total
|
0.35197 | 126 | 1985 Oct 28
|
Total
|
−0.40218 | |
| 131 | 1986 Apr 24
|
Total
|
−0.36826 | 136 | 1986 Oct 17
|
Total
|
0.31887 | |
| 141 | 1987 Apr 14
|
Penumbral
|
−1.13641 | 146 | 1987 Oct 07
|
Penumbral
|
1.01890 | |
| Last set | 1984 Jun 13 | Last set | 1983 Dec 20 | |||||
| Next set | 1988 Mar 03 | Next set | 1988 Aug 27 | |||||
Saros series
editLunar Saros 111, repeating every 18 years and 11 days, has a total of 71 lunar eclipse events including 11 total lunar eclipses. The first total lunar eclipse of this series was on April 19, 1353, and last was on August 4, 1533. The longest occurrence of this series was on June 12, 1443 when the totality lasted 106 minutes.
Metonic series
editThis eclipse is the first of four Metonic cycle lunar eclipses on the same date, May 15–16, each separated by 19 years.
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.
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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 118.
| May 11, 1975 | May 21, 1993 |
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See also
editNotes
edit- ^ Hermit Eclipse: Saros cycle 109
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit- 1984 May 15 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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