Col | Heading | Definition/Description |
---|---|---|
1 | Date | Date when the eclipse begins. Gregorian Calendar is used for dates after 1582 Oct 15. Julian Calendar is used for dates before 1582 Oct 04. |
2 | Ecl. Type | Eclipse Type where: N = Penumbral Eclipse. P = Partial Eclipse. T = Total Eclipse. |
3 | Pen. Mag. | Penumbral magnitude is the fraction of the Moon's DIAMETER obscured by Earth's penumbral shadow. For penumbral eclipses, it is usually less than 1.0. |
4 | Umb. Mag. | Umbral magnitude is the fraction of the Moon's DIAMETER obscured by Earth's umbral shadow. For partial eclipses, it is greater than 0 but less than 1.0. For total eclipses, it is equal or greater than 1.0. |
5 | Pen. Eclipse Begins | Local Time when the penumbral eclipse begins. (not visible to the naked eye) |
6 | Alt | Moon's altitude (in degrees) when penumbral eclipse begins. |
7 | Partial Eclipse Begins | Local Time when the partial eclipse begins. |
8 | Alt | Moon's altitude (in degrees) when partial eclipse begins. |
9 | Total Eclipse Begins | Local Time when the total eclipse begins. |
10 | Alt | Moon's altitude (in degrees) when total eclipse begins. |
11 | Mid. Eclipse | Local Time at mid-eclipse. |
12 | Alt | Moon's altitude (in degrees) at mid-eclipse. |
13 | Total Eclipse Ends | Local Time when the total eclipse ends. |
14 | Alt | Moon's altitude (in degrees) when total eclipse ends. |
15 | Partial Eclipse Ends | Local Time when the partial eclipse ends. |
16 | Alt | Moon's altitude (in degrees) when partial eclipse ends. |
17 | Pen. Eclipse Ends | Local Time when the penumbral eclipse ends. (not visible to the naked eye) |
18 | Alt | Moon's altitude (in degrees) when penumbral eclipse ends. |
The Javascript Lunar Eclipse Explorer was developed by Chris O'Byrne and Fred Espenak. It features drop-down menus for city coordinates and buttons to select any century from -1999 to 3000 (2000 BCE to 3000 CE). It can be used to explore the frequency and circumstances of all lunar eclipses visible from any location on Earth.
The Besselian elements and values of ΔT used in Lunar Eclipse Explorer were calculated by Jean Meeus and Fred Espenak. For the purposes of calculating eclipse circumstances from a given place, the growing uncertainty in the value of ΔT and the corresponding longitude become unacceptably large outside time period of -1999 to 3000 (2000 BCE to 3000 CE).
Permission is freely granted to reproduce this data when accompanied by an acknowledgment:
"Eclipse Predictions by Fred Espenak and Chris O'Byrne (NASA's GSFC)"
Link to Lunar Eclipse Explorer Page