Anne's Spot

Anne's Spot refers to a reddish-colored anticyclonic oval in Saturn's atmosphere, observed in 1980 and 1981 at 55°S by the Voyager space probes.[1] It was probably also observed in 2004 at about 53°S by the Cassini orbiter, one-third larger east-west and with faster winds.[2][3]

References

Lewis, Patrick (2006-01-27). Giant Planets of Our Solar System: An Introduction. Springer Science & Business Media. p. 179.
A.R. Vasavada; S.M. Hörst; M.R. Kennedy; A.P. Ingersoll; C.C. Porco; A.D. DelGenio; R.A. West (19 May 2006). "Cassini imaging of Saturn: Southern hemisphere winds and vortices" (PDF). Journal of Geophysical Research: Planets. 111: E05004. Bibcode:2006JGRE..111.5004V. doi:10.1029/2005JE002563. If so, it has moved ~2° north in latitude and increased in velocity by ~25 m s−1, just as predicted by the zonal wind profile (in addition, its east-west diameter has increased from 3200 km to 4500 km).
Agustín Sánchez-Lavega; José F. Rojas; Pedro V. Sada (October 2000). "Saturn's Zonal Winds at Cloud Level". Icarus. 147 (2): 405–420. Bibcode:2000Icar..147..405S. doi:10.1006/icar.2000.6449.

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[Lewis-1] Lewis, Patrick (2006-01-27). Giant Planets of Our Solar System: An Introduction. Springer Science & Business Media. p. 179.

[Vasavada+-2] A.R. Vasavada; S.M. Hörst; M.R. Kennedy; A.P. Ingersoll; C.C. Porco; A.D. DelGenio; R.A. West (19 May 2006). "Cassini imaging of Saturn: Southern hemisphere winds and vortices" (PDF). Journal of Geophysical Research: Planets. 111: E05004. Bibcode:2006JGRE..111.5004V. doi:10.1029/2005JE002563. If so, it has moved ~2° north in latitude and increased in velocity by ~25 m s−1, just as predicted by the zonal wind profile (in addition, its east-west diameter has increased from 3200 km to 4500 km).

[SR&S-3] Agustín Sánchez-Lavega; José F. Rojas; Pedro V. Sada (October 2000). "Saturn's Zonal Winds at Cloud Level". Icarus. 147 (2): 405–420. Bibcode:2000Icar..147..405S. doi:10.1006/icar.2000.6449.