Решение:
\[ F = G \frac{m_1 m_2}{r^2} \]
\[ m_1 = \frac{F r^2}{G m_2} \]
\[ m_1 = \frac{8.3375 \text{ H} \times (4 \text{ м})^2}{6.674 \times 10^{-11} \text{ Н} \cdot \text{м}^2/\text{кг}^2 \times 4 \times 10^8 \text{ кг}} \]
\[ m_1 = \frac{8.3375 \times 16}{6.674 \times 10^{-11} \times 4 \times 10^8} \]
\[ m_1 = \frac{133.4}{2.6696 \times 10^{-2}} \]
\[ m_1 = \frac{133.4}{0.026696} \]
\[ m_1 \approx 5000 \text{ кг} \]
Ответ: 5000 кг