Astro13/Exoplaneten/A16

a) $$\phi = b : r = 100 AE : 25 Lj = 6,32 E10^{-5}$$

13" = 13 : 3600 ° = 6,29 10-5

c) a = 115 AE e = 13 AE $$\varepsilon = 0,113$$

d)e)  M = 3,98 1030 kg = 2,0 MSonne