# Supermoon Lunar Eclipse?

I recently read this article: http://www.cbsnews.com/news/supermoon-lunar-eclipse-coming-this-month/ I'm having some trouble understanding how a "supermoon" lunar eclipse is possible.

Judging from this diagram, it would seem that the moon always reaches its apsides above or below the orbital plane of the earth around the sun, making any kind of eclipse at these points impossible. Can someone clarify for me?

Thank you.

• The moon reaches apsides about twice a month (one apogee and one perigee), and the diagram above appears to be for an entire year? The moon reaches perigee every 26 days or so [this is a very rough number], and is full every 29.5 days or so, so they can occur at the same time. When they both occur AND we the moon is at ascending/descending node, we have a supermoon eclipse.
– user21
Sep 5, 2015 at 1:23
• @barrycarter Thanks for this comment. I guess what I'm confused about is that the diagram above shows the ascending and descending nodes along the minor axis of the lunar ellipses. Doesn't the moon's perigee and apogee occur at the vertices of the major axis of the ellipse? If so, it seems from this figure that a moon's perigee/apogee could never coincide with a lunar node. Sep 5, 2015 at 3:14
• The diagram is in some form of perspective and does not represent the shape of the Earth's or the Moon's orbits (nor is it to scale) Sep 5, 2015 at 4:42
• This image is highly misleading and is not meant to represent Earth's orbit around the Sun. It's actually part of a larger image: pages.uoregon.edu/jimbrau/BrauImNew/Chap01/FG01_27.jpg which might be slightly more helpful.
– user21
Sep 5, 2015 at 13:11