| Date | June 13, 1984 |
|---|---|
| Gamma | −1.5240 |
| Magnitude | −0.9414 |
| Saros ser | 149 |
| Saros no | 1 of 72 |
| Penumbral | 73 minutes, 0 seconds |
| P 1 | 13:49:05 |
| Greatest | 14:25:45 |
| P 4 | 15:02:05 |
| Previous | May 1984 |
| Next | November 1984 |
A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Wednesday, June 13, 1984,[1] with an umbral magnitude of −0.9414. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into the Earth's penumbra. Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. Occurring about 6.1 days after perigee (on June 7, 1984, at 12:25 UTC), the Moon's apparent diameter was larger.[2]
This minor penumbral eclipse was visually imperceptible, but marked the first lunar eclipse in Lunar Saros 149.[3]
Visibility
The eclipse was completely visible over the eastern half of Asia, Australia, and Antarctica, seen rising over Madagascar and central Asia and setting over the eastern Pacific Ocean.[4]
Eclipse details
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[5]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 0.06474 |
| Umbral Magnitude | −0.94137 |
| Gamma | −1.52403 |
| Sun Right Ascension | 05h28m22.3s |
| Sun Declination | +23°14'34.9" |
| Sun Semi-Diameter | 15'44.8" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 17h27m24.8s |
| Moon Declination | -24°41'08.0" |
| Moon Semi-Diameter | 15'39.1" |
| Moon Equatorial Horizontal Parallax | 0°57'26.4" |
| ΔT | 54.0 s |
Eclipse season
This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by a fortnight. The first and last eclipse in this sequence is separated by one synodic month.
| May 15 Descending node (full moon) | May 30 Ascending node (new moon) | June 13 Descending node (full moon) |
|---|---|---|
| Penumbral lunar eclipse Lunar Saros 111 | Annular solar eclipse Solar Saros 137 | Penumbral lunar eclipse Lunar Saros 149 |
Related eclipses
Eclipses in 1984
- 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.
Metonic
- Preceded by: Lunar eclipse of August 26, 1980
Tzolkinex
- Followed by: Lunar eclipse of July 26, 1991
Tritos
- Preceded by: Lunar eclipse of July 15, 1973
Lunar Saros 149
- Followed by: Lunar eclipse of June 24, 2002
Inex
- Followed by: Lunar eclipse of May 25, 2013
Triad
- Preceded by: Lunar eclipse of August 12, 1897
Tritos series
| Series members between 1801 and 2060 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1809 Oct 23 (Saros 133) | 1820 Sep 22 (Saros 134) | 1831 Aug 23 (Saros 135) | 1842 Jul 22 (Saros 136) | 1853 Jun 21 (Saros 137) | |||||
| 1864 May 21 (Saros 138) | 1875 Apr 20 (Saros 139) | 1886 Mar 20 (Saros 140) | 1897 Feb 17 (Saros 141) | 1908 Jan 18 (Saros 142) | |||||
| 1918 Dec 17 (Saros 143) | 1929 Nov 17 (Saros 144) | 1940 Oct 16 (Saros 145) | 1951 Sep 15 (Saros 146) | 1962 Aug 15 (Saros 147) | |||||
| 1973 Jul 15 (Saros 148) | 1984 Jun 13 (Saros 149) | ||||||||
| 2060 Nov 08 (Saros 156) | |||||||||
Inex series
| Series members between 1801 and 2200 | |||||
|---|---|---|---|---|---|
| 1810 Oct 12 (Saros 143) | 1839 Sep 23 (Saros 144) | 1868 Sep 02 (Saros 145) | |||
| 1897 Aug 12 (Saros 146) | 1926 Jul 25 (Saros 147) | ||||
| 1984 Jun 13 (Saros 149) | 2013 May 25 (Saros 150) | ||||
| 2187 Jan 24 (Saros 156) | |||||
See also
Notes
- ^ "June 13–14, 1984 Penumbral Lunar Eclipse". timeanddate. Retrieved 6 January 2025.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 6 January 2025.
- ^ Hermit Eclipse: Saros cycle 149
- ^ "Penumbral Lunar Eclipse of 1984 Jun 13". NASA. Retrieved 6 January 2025.
- ^ "Penumbral Lunar Eclipse of 1984 Jun 13". EclipseWise.com. Retrieved 6 January 2025.