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Widdekind
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Terrestrial worlds are 28% iron by mass*. The Solar nebula was 0.11-0.13% iron by mass**. Assuming that the early Earth kept all of its iron:
S.F. Green, et al. An Introduction to the Sun and Stars, pg. 46.
Msub-nebula x 0.0012 = Mearth x 0.28
Thus:Msub-nebula = Mearth x 230
There are ~2.0 Earth-masses of rocky bodies in the Inner Solar System. Thus, those ~2.0 Earth masses of rock condensed out of ~460 Earth-masses of sub-nebular gases. This is comparable to the combined masses of Jupiter & Saturn. So, perhaps Jupiter & Saturn accumulated their material from the Inner Solar System. This also suggests that Jupiter's rocky core is only about 1.5 Earth-masses, that Saturn's rocky core is only about 0.5 Earth-masses, while those of Uranus & Neptune are more like Mars in size.* S.N. Raymond, et al. Exotic Earths: Forming Habitable Worlds with Giant
Planet Migration, pg. 13. (See: http://arxiv.org/PS_cache/astro-ph/pdf/0609/0609253v1.pdf )
** http://www.kayelaby.npl.co.uk/chemistry/3_1/3_1_3.html ; http://astro.uni-tuebingen.de/~rauch/TMAP/UserGuide/UserGuidese12.html
Planet Migration, pg. 13. (See: http://arxiv.org/PS_cache/astro-ph/pdf/0609/0609253v1.pdf )
** http://www.kayelaby.npl.co.uk/chemistry/3_1/3_1_3.html ; http://astro.uni-tuebingen.de/~rauch/TMAP/UserGuide/UserGuidese12.html
X = 0.735
Y = 0.248
Z = 0.017
Y = 0.248
Z = 0.017
S.F. Green, et al. An Introduction to the Sun and Stars, pg. 46.
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