September 1997 lunar eclipse

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Template:Short description Template:Infobox lunar eclipse A total lunar eclipse occurred at the Moon’s descending node of orbit on Tuesday, September 16, 1997,[1] with an umbral magnitude of 1.1909. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. 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. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon's shadow is smaller. Occurring only about 2.5 hours after perigee (on September 16, 1997, at 16:20 UTC), the Moon's apparent diameter was larger.[2]

This lunar eclipse was the last of an almost tetrad, with the others being on April 4, 1996 (total); September 27, 1996 (total); and March 24, 1997 (partial).

Visibility

The eclipse was completely visible over east Africa, eastern Europe, much of Asia, and western Australia, seen rising over eastern South America, western Europe, and west and central Africa and setting over northeast Asia and eastern Australia.[3]

File:Lunar eclipse from moon-1997Sep16.png File:Lunar eclipse chart close-1997Sep16.png

Eclipse details

Shown below is a table displaying details about this particular lunar eclipse. It describes various parameters pertaining to this eclipse.[4]

September 16, 1997 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.14167
Umbral Magnitude 1.19094
Gamma −0.37684
Sun Right Ascension 11h37m42.6s
Sun Declination +02°24'38.0"
Sun Semi-Diameter 15'54.7"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 23h38m10.7s
Moon Declination -02°46'41.1"
Moon Semi-Diameter 16'44.2"
Moon Equatorial Horizontal Parallax 1°01'25.5"
ΔT 62.7 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.

Eclipse season of September 1997
September 2
Ascending node (new moon)
 September 16
Descending node (full moon)
File:SE1997Sep02P.png File:Lunar eclipse chart close-1997Sep16.png
Partial solar eclipse
Solar Saros 125		 Total lunar eclipse
Lunar Saros 137

Related eclipses

Eclipses in 1997

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 137

Inex

Triad

Lunar eclipses of 1995–1998

Template:Lunar eclipse set 1995-1998

Saros 137

Template:Lunar Saros series 137

Tritos series

Template:Lunar Tritos series August 2008

Inex series

Template:Lunar Inex series August 2026

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 annular solar eclipses of Solar Saros 144.

September 11, 1988 September 22, 2006
File:SE1988Sep11A.png File:SE2006Sep22A.png

See also

References

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
  4. ↑ Script error: No such module "citation/CS1".
  5. ↑ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

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External links

Template:Lunar eclipses

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