Lunar coordinates

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Lunar coordinates

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1richardbsmith
Editat: gen. 4, 2010, 7:11am

Am I correct in understanding that lunar coordinates basically line up NS and EW with the celestial sphere, with lunar north pointing to the celestial north pole?

I found this on lunar coordinates, but a little over my head.

http://lunar.gsfc.nasa.gov/library/02b-Lunar_Crd_Sys-Archinal.pdf

http://www.jasmine-galaxy.org/pub/2007/petorova.ppt
a presentation on lunar coordinates

2Noisy
gen. 4, 2010, 7:48am

Wow ... good question. Good as in interesting, not as in scholar to student, because I know nothing about this subject myself.

I followed both of the links you gave, and it seems that there are myriad systems that could be used. From those resources, there seem to be three main ones: one that is based on the position of the Moon with respect to the Earth, such that the co-ordinate points will wander about the surface of the moon as the moon changes its orientation to the Earth; a second that is based on the plane of the ecliptic (the plane of the solar system); and a third that is based on the motion of the Moon about its axis (but that becomes really complex because the Moon is pulled all over the place by the Earth). It looks as if there are a bunch of other ones as well, which have come into and gone out of favour over time: relationship to a fixed point on the surface of the Moon, or to the orbit of an observational satellite.

Looks like a very complex subject.