Calculating Delta-V in Hohmann Transfer Equation

[Solistics]

I'm having some slight difficulties in calculating the delta-v in a hohmann transfer equation. I used the equation from wikipedia (which i hope is correct) but whenever i replace the variables i get an extremely small delta-v, is this normal?

\Deltav=\sqrt{}(\mu/r1)*(\sqrt{}(2*r2/(r1+r2)-1))

r1=6374000 meters
r2=405500000 meters
\mu=9.814

my final result was 0.00122149m/s
it seems like a really small number, is this right or I'm i doing something really wrong?

i attached an excel sheet to show you my work.

thanks in advance

 

[Janus]

I'm having some slight difficulties in calculating the delta-v in a hohmann transfer equation. I used the equation from wikipedia (which i hope is correct) but whenever i replace the variables i get an extremely small delta-v, is this normal?

\Deltav=\sqrt{}(\mu/r1)*(\sqrt{}(2*r2/(r1+r2)-1))

r1=6374000 meters
r2=405500000 meters
\mu=9.814

my final result was 0.00122149m/s
it seems like a really small number, is this right or I'm i doing something really wrong?

i attached an excel sheet to show you my work.

thanks in advance

The problem is your value for \mu

\mu = GM

Where G is the universal gravitational constant and is equal to

6.67300 × 10^-11 m³ kg^-1 s^-2

and M in this case is the mass of the Earth, or 5.97 x 10²⁴ kg

so

4.651 X 10^{14}m^3 s^{-2}

 

[Solistics]

thanks for that correction.