A new result about Saturn's spin rate was published today:

http://news.sciencemag.org/space/2015/03/s...got-bit-shorter

"Helled's team deduced the spin from the planet's gravity field. Saturn spins fast, making its equator bulge outward, which distorts the gravity field in ways Cassini has measured. By modeling this effect, Helled's team reports online today in Nature that Saturn spins every 10 hours and 32 minutes and 45 seconds with an uncertainty of 46 seconds. That's more than 6 minutes faster than Voyager found."

"Because Saturn is so big, the equator at the level of the atmosphere must spin nearly 400 kilometers per hour faster than the Voyager value implied. Scientists measure wind speeds relative to the spinning planet, so the new rotation rate alters the estimated wind speeds by that same amount."

I would be curious to see the corrected wind profiles.
Regards,
Marc.

A little less than four years later, looks like a new (and hopefully final!) result: 10 hours, 33 minutes, 38 seconds

http://iopscience.iop.org/article/10.3847/...357/aaf798/meta

'Ring seismology' is not a term one hears every day! One mystery down, many more to go.

Press release: https://www.jpl.nasa.gov/news/news.php?feature=7316

Well, down in the details in the abstract, they list their error bars as + 1 min 52 sec and - 1 min 19 sec.

This overlaps with the earlier result from 2015, which actually claims to be more precise.

These two results both agree that Saturn is spinning faster than the estimates from Voyager. Also other estimates from Cassini.

Topic title edited for clarity and scope.