juliensimon/lunar-eclipse-catalog

这是一个完整的月食目录，涵盖五千年（公元前1999年至公元3000年），由弗雷德·埃斯佩纳克计算，作为NASA五千年月食经典的一部分。月食发生时，月球穿过地球的阴影。月球可以进入微弱的半影阴影（产生微弱的变暗）、较暗的本影阴影（产生清晰可见的偏食）或完全沉浸在本影中（月全食，通常因阳光通过地球大气折射而呈现戏剧性的红色）。与日食不同，月食同时从地球的整个夜半球可见，这使得它们在历史上对跨文明日历同步具有重要意义。该目录源自弗雷德·埃斯佩纳克的五千年月食经典，使用与伴生日食目录相同的计算基础：贝塞尔元素与Chapront、Chapront-Touze和Francou的多项式表达式用于月球和太阳坐标，并修正了月球的长期加速度和通过Delta-T的地球自转变化。gamma参数测量月球中心与地球阴影轴的带符号最小距离。当gamma在-0.9972和+0.9972之间时，月球完全沉浸在本影中（全食）；在±1.0260之间时，部分在本影中（偏食）；在±1.0620之间时，仅与半影相交。umbral_magnitude给出月球直径沉浸在本影中的比例——大于1.0的值表示全食。全食期间的红色着色取决于当时地球大气的透明度，由Danjon尺度定性描述（0 = 非常暗，4 = 亮铜红色）。该数据集适用于表格分类任务。Complete catalog of lunar eclipses spanning five millennia (-1999 to +3000), computed by Fred Espenak as part of NASAs Five Millennium Canon of Lunar Eclipses. A lunar eclipse occurs when the Moon passes through Earths shadow. The Moon can enter the faint penumbral shadow (producing a subtle darkening), the darker umbral shadow (producing a clearly visible partial eclipse), or become fully immersed in the umbra (a total lunar eclipse, often dramatically colored red by sunlight refracted through Earths atmosphere). Unlike solar eclipses, lunar eclipses are visible from the entire night side of Earth simultaneously, making them historically important for synchronizing calendars across civilizations. This catalog is derived from Fred Espenaks Five Millennium Canon of Lunar Eclipses, using the same computational foundation as the companion solar eclipse catalog: Besselian elements with polynomial expressions from Chapront, Chapront-Touze, and Francou for lunar and solar coordinates, with corrections for the secular acceleration of the Moon and variable Earth rotation via Delta-T. The gamma parameter measures the signed minimum distance of the Moons center from Earths shadow axis. When gamma is between -0.9972 and +0.9972, the Moon is fully immersed in the umbra (total eclipse); between ±1.0260 it is partially in the umbra (partial eclipse); and between ±1.0620 only the penumbra is intersected. The umbral_magnitude gives the fraction of the Moons diameter immersed in the umbra — values above 1.0 indicate a total eclipse. Red coloring during totality depends on Earths atmospheric transparency at the time, described qualitatively by the Danjon scale (0 = very dark, 4 = bright copper-red). This dataset is suitable for tabular classification tasks.