July 1999 lunar eclipse
Template:Short description Template:Infobox lunar eclipse A partial lunar eclipse occurred at the Moon’s descending node of orbit on Wednesday, July 28, 1999,[1] with an umbral magnitude of 0.3966. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in 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 5.2 days after apogee (on July 23, 1999, at 6:45 UTC), the Moon's apparent diameter was smaller.[2]
Visibility
The eclipse was completely visible over eastern Australia, Antarctica, and much of the Pacific Ocean, seen rising over east and southeast Asia and western Australia and setting over much of North and South America.[3]
| File:Lunar eclipse from moon-1999Jul28.png File:Lunar eclipse chart close-1999Jul28.png |
Eclipse details
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 1.43423 |
| Umbral Magnitude | 0.39658 |
| Gamma | 0.78630 |
| Sun Right Ascension | 08h29m15.8s |
| Sun Declination | +19°01'23.5" |
| Sun Semi-Diameter | 15'45.0" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 20h28m49.2s |
| Moon Declination | -18°18'03.0" |
| Moon Semi-Diameter | 15'10.7" |
| Moon Equatorial Horizontal Parallax | 0°55'42.5" |
| ΔT | 63.7 s |
Eclipse season
Script error: No such module "Labelled list hatnote". 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.
| July 28 Descending node (full moon) |
August 11 Ascending node (new moon) |
|---|---|
| File:Lunar eclipse chart close-1999Jul28.png | File:SE1999Aug11T.png |
| Partial lunar eclipse Lunar Saros 119 |
Total solar eclipse Solar Saros 145 |
Related eclipses
Eclipses in 1999
- A penumbral lunar eclipse on January 31.
- An annular solar eclipse on February 16.
- A partial lunar eclipse on July 28.
- A total solar eclipse on August 11.
Metonic
- Preceded by: Lunar eclipse of October 8, 1995
- Followed by: Lunar eclipse of May 16, 2003
Tzolkinex
- Preceded by: Lunar eclipse of June 15, 1992
- Followed by: Lunar eclipse of September 7, 2006
Half-Saros
- Preceded by: Solar eclipse of July 22, 1990
- Followed by: Solar eclipse of August 1, 2008
Tritos
- Preceded by: Lunar eclipse of August 27, 1988
- Followed by: Lunar eclipse of June 26, 2010
Lunar Saros 119
- Preceded by: Lunar eclipse of July 17, 1981
- Followed by: Lunar eclipse of August 7, 2017
Inex
- Preceded by: Lunar eclipse of August 17, 1970
- Followed by: Lunar eclipse of July 6, 2028
Triad
- Preceded by: Lunar eclipse of September 26, 1912
- Followed by: Lunar eclipse of May 28, 2086
Lunar eclipses of 1998–2002
Template:Lunar eclipse set 1998-2002
Saros 119
Template:Lunar Saros series 119
Tritos series
Template:Lunar Tritos series June 2010
Inex series
Template:Lunar Inex series July 2028
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[5] This lunar eclipse is related to two total solar eclipses of Solar Saros 126.
| July 22, 1990 | August 1, 2008 |
|---|---|
| File:SE1990Jul22T.png | File:SE2008Aug01T.png |
