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Related eclipses

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{{Short description|Partial lunar eclipse July 28, 1999}}
{{Infobox lunar eclipse
| type = partial
| image = Lunar eclipse chart close-1999Jul28.png
| caption = The Moon's hourly motion shown right to left
| date = July 28, 1999
| gamma = 0.7863
| magnitude = 0.3966
| saros_ser = 119
| saros_no = 61 of 83
| partiality = 142 minutes, 32 seconds
| penumbral = 310 minutes, 56 seconds
| p1 = 8:58:15
| u1 = 10:22:31
| greatest = 11:33:43
| u4 = 12:45:03
| p4 = 14:09:11
| previous = January 1999
| next = January 2000
}}
A partial [[lunar eclipse]] occurred at the Moon’s [[Lunar node|descending node]] of orbit on Wednesday, July 28, 1999,<ref>{{cite web|title=July 27–28, 1999 Partial Lunar Eclipse|url=https://www.timeanddate.com/eclipse/lunar/1999-july-28|publisher=timeanddate|access-date=9 January 2025}}</ref> with an umbral [[Magnitude of eclipse|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 [[Apsis|apogee]] (on July 23, 1999, at 6:45 UTC), the Moon's apparent diameter was smaller.<ref>{{cite web|title=Moon Distances for London, United Kingdom, England|url=https://www.timeanddate.com/astronomy/moon/distance.html?year=1999&n=136|publisher=timeanddate|access-date=9 January 2025}}</ref>

== Visibility ==
The eclipse was completely visible over eastern [[Australia]], [[Antarctica]], and much of the [[Pacific Ocean]], seen rising over [[east Asia|east]] and [[southeast Asia]] and western Australia and setting over much of [[North America|North]] and [[South America]].<ref>{{cite web|title=Partial Lunar Eclipse of 1999 Jul 28|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot1951/LE1999Jul28P.pdf|publisher=NASA|access-date=9 January 2025}}</ref>

{| class=wikitable
|[[File:Lunar eclipse from moon-1999Jul28.png|300px]] [[File:Lunar eclipse chart close-1999Jul28.png|300px]]
|}

== Eclipse details ==
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.<ref>{{cite web|title=Partial Lunar Eclipse of 1999 Jul 28|url=https://eclipsewise.com/lunar/LEprime/1901-2000/LE1999Jul28Pprime.html|publisher=EclipseWise.com|access-date=9 January 2025}}</ref>

{|class="wikitable" align="{{{align|left}}}" style="margin:{{#ifeq:{{{align}}}|right|0 0 0.5em 1em|0 1em 0.5em 0}}"
|+July 28, 1999 Lunar Eclipse Parameters
! 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
|}
{{clear}}

== Eclipse season ==
{{See also|Eclipse cycle}}
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]].

{| class="wikitable"
|+ Eclipse season of July–August 1999
! [[July 1999 lunar eclipse|July 28]] Descending node (full moon) !! [[Solar eclipse of August 11, 1999|August 11]] Ascending node (new moon) 
|-
| [[File:Lunar eclipse chart close-1999Jul28.png|200px]] || [[File:SE1999Aug11T.png|200px]]
|- align=center
| [[Lunar eclipse#Types of lunar eclipse|Partial lunar eclipse]] Lunar Saros 119 || [[Total eclipse#Types|Total solar eclipse]] Solar Saros 145
|}

== Related eclipses ==
=== Eclipses in 1999 ===
* [[January 1999 lunar eclipse|A penumbral lunar eclipse on January 31]].
* [[Solar eclipse of February 16, 1999|An annular solar eclipse on February 16]].
* '''A partial lunar eclipse on July 28.'''
* [[Solar eclipse of August 11, 1999|A total solar eclipse on August 11]].

=== Metonic ===
* Preceded by: [[October 1995 lunar eclipse|Lunar eclipse of October 8, 1995]]
* Followed by: [[May 2003 lunar eclipse|Lunar eclipse of May 16, 2003]]

=== Tzolkinex ===
* Preceded by: [[June 1992 lunar eclipse|Lunar eclipse of June 15, 1992]]
* Followed by: [[September 2006 lunar eclipse|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: [[August 1988 lunar eclipse|Lunar eclipse of August 27, 1988]]
* Followed by: [[June 2010 lunar eclipse|Lunar eclipse of June 26, 2010]]

=== Lunar Saros 119 ===
* Preceded by: [[July 1981 lunar eclipse|Lunar eclipse of July 17, 1981]]
* Followed by: [[August 2017 lunar eclipse|Lunar eclipse of August 7, 2017]]

=== Inex ===
* Preceded by: [[August 1970 lunar eclipse|Lunar eclipse of August 17, 1970]]
* Followed by: [[July 2028 lunar eclipse|Lunar eclipse of July 6, 2028]]

=== Triad ===
* Preceded by: [[September 1912 lunar eclipse|Lunar eclipse of September 26, 1912]]
* Followed by: [[May 2086 lunar eclipse|Lunar eclipse of May 28, 2086]]

=== Lunar eclipses of 1998–2002 ===
{{Lunar_eclipse_set_1998-2002}}

=== Saros 119 ===
{{Lunar Saros series 119}}

=== Tritos series ===
{{Lunar Tritos series June 2010}}

=== Inex series ===
{{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 [[Saros (astronomy)#Relationship between lunar and solar saros .28sar.29|half saros]]).<ref>Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, ''The half-saros''</ref> This lunar eclipse is related to two total solar eclipses of [[Solar Saros 126]].
{| class=wikitable
![[Solar eclipse of July 22, 1990|July 22, 1990]]
![[Solar eclipse of August 1, 2008|August 1, 2008]]
|-
|[[File:SE1990Jul22T.png|240px]]
|[[File:SE2008Aug01T.png|240px]]
|}

== See also ==
*[[List of lunar eclipses]]
*[[List of 20th-century lunar eclipses]]

== References ==
<references />

== External links ==
* [http://www.hermit.org/eclipse/gen_stats.cgi?mode=query&page=full&qtype=type&body=L&saros=119 Saros cycle 119]
* [http://www.starrynightphotos.com/moon/eclipse_99.htm Partial Lunar Eclipse 28 July 1999]
* {{LEplot1951 link|1999|Jul|28|P}}

{{Lunar eclipses}}

{{DEFAULTSORT:Lunar eclipse 1999-07}}
[[Category:20th-century lunar eclipses|1999-07]]
[[Category:1999 in science]]
[[Category:July 1999]]

{{lunar-eclipse-stub}}

July 1999 lunar eclipse - Revision history

imported>Weatherman4064: /* Related eclipses */