Ecliptic in lunar eclipse

[Andreas Vossinakis]

The circumstances for the upcoming total lunar eclipse can be found here: https://eclipse.gsfc.nasa.gov/LEplot/LEplot2001/LE2025Sep07T.pdf, where the ecliptic is dead center on the shadow of the Earth.

Viewing the eclipse in Stellarium (and Cartes du Ciel) the ecliptic is about a degree farther from the center of the shadow of the Earth.

Umbra is supposed to be on the ecliptic plane, right??

Why this difference??

[Fernando Ordóñez Monteagudo]

This happens because YOU are not seeing the Umbra from the center of the Earth or a point in the Earth's surface aligned with the Eclipctic. If you want to see the Umbra centered with the Ecliptic, change to Geocentric coordinates. Configuration -> Tools -> unmark "Topocentric coordinates"

Regards

Fernando.

Seville, SPAIN

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[Alexander V. Wolf]

пт, 29 авг. 2025 г. в 14:13, Andreas Vossinakis <andreas.v...@gmail.com>:

Topocentric (Stellarium) vs. geocentric (NASA) view

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With best regards, Alexander