2,7,4'-Trihydroxyisoflavanone 4'-O-methyltransferase

Template:Underlinked The nodal period of a satellite is the time between successive passages of a satellite through successive orbital nodes. This applies to artificial, such as weather satellites, and natural satellites the moon. The nodal period of Earth's moon is 27.2122 days.

Near Earth-Satellites

The oblateness of the Earth has important effects of the orbits of near Earth-satellites. An expression for the nodal period ($T_n$) of a near circular orbit, such that the eccentricity (ε) is almost but not equal to zero, is:

$T_n=\frac{2\pi a^{\frac{3}{2}}}{{\mu }^{\frac{1}{2}}}[1-\frac{3J_2(4-5{\sin }^{2}i}{4(\frac{a}{R}{)}^2\sqrt{(1-{ϵ}^2}(1+ϵ\cos \omega {)}^2}-\frac{3J_2(1-ϵ\cos \omega {)}^3}{2(\frac{a}{R}{)}^2(1-{ϵ}^2{)}^3}]$

References

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