Where the place or the planet, when Muhammad mi’raj ?

Mi’raj event, starting from the evening until just before Fajr. Means from 19:00 until 4:00 or 9 hour drive.
If half the journey 4.5 hours, then the distance traveled by the vehicle Buraq record exists at the same speed of light or 300,000 km / sec, ie:
S = vt
= 300 000. 4.5
= 300 000. 3600. 4.5
= 4,860,000,000 kilo meters
While the distance of Neptune from the sun is 4,500,000,000 kms or no affinity. What is the planet Neptune is a place visited during mi’raj ?