Would it be easier to measure a stars parallax from Ceres? Why?

1 Answer
Feb 10, 2017

When you measure parallax, you use a baseline.


At the ends of the baseline you measure angles that are VERY close to 90 degrees. The difference between them is called the parallax.
Now, the longer the baseline, the larger the parallax for a certain distance.
Earth-bound parallax uses the two extremes of the Earth's orbit as a baseline. The orbit of Ceres is much larger that that of Earth, so it would give better readings.