1. It was also found to have an unusually long period of rotation . 2. A photometric study in 2001 was unable to find a definite period of rotation . 3. The estimated period of rotation is about 24 days. 4. However, the energy of the largest flares is not related to the period of rotation . 5. A projected rotational velocity of 0.6 km / s suggests it has a low period of rotation . 6. This means the period of rotation is approximately independent of the force applied to keep it rotating. 7. In the 19th century, many observers stated that Venus had a period of rotation of roughly 24 hours. 8. As on Earth, the period of rotation of Mars ( the length of its day ) is slowing down. 9. The periods of these variations are all equal and are believed to equal the period of rotation of the star. 10. At the South Pole, as the modern-day scientists confirmed, the period of rotation is 24 hours . ( Ranking : 10)
Mobile