If the solar wind from the coronal hole is traveling at 800 kilometers per second (km/s), we can estimate the time it takes to reach Earth from the Sun. The average distance from the Sun to Earth is about 149.6 million kilometers (1 AU - astronomical unit).

Here's the calculation:

- Distance: 149,600,000 km
- Speed: 800 km/s

Time = Distance / Speed
Time = 149,600,000 km / 800 km/s
Time ≈ 187,000 seconds

Converting seconds to hours:
187,000 seconds / 3600 (seconds per hour) ≈ 51.94 hours

So, at a speed of 800 km/s, the solar wind would take approximately **52 hours** to travel from the Sun to Earth. However, please note this is an ideal calculation assuming a straight-line path and constant speed, which might not perfectly reflect real conditions due to solar wind interactions in space. If the solar wind has already been released and is closer or if its speed varies, the arrival time would adjust accordingly.