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