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Collection:
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NASA Cassini-Huygens Collection
Collection
NASA Cassini-Huygens Collection
Collection
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Title:
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Spokes Sighted Again!
Title
Spokes Sighted Again!
Title
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Description:
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This image from the Cassini spacecraft shows a ghostly white streak, called a spoke, in Saturn's B ring.
description
This image from the Cassini spacecraft shows a ghostly white streak, called a spoke, in Saturn's B ring.
Description
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Full Description:
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This image from the Cassini spacecraft shows a ghostly white streak, called a spoke, in Saturn's B ring. This is the first sighting of a spoke in nearly a year, and the first spoke seen by Cassini on the sunlit side of the rings. It is also the first spoke seen at high phase angle -- that is, the angle formed between the sun, the rings and Cassini. In this geometry, the feature appears white (instead of black) against the rings because the very small particles comprising the spoke preferentially scatter light in the forward direction (i.e. toward Cassini), making the spoke brighter than the background rings. The clear-filter image was taken in visible light with the Cassini spacecraft wide-angle camera on July 23, 2006, at a distance of approximately 692,000 kilometers (430,000 miles) from Saturn and at a sun-Saturn-spacecraf t, or phase, angle of 115 degrees. Image scale on the sky at the distance of Saturn is 38 kilometers (23 miles) per pixel. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo. For more information about the Cassini-Huygens mission visit http://saturn.jpl.n…. The Cassini imaging team homepage is at http://ciclops.org. *Credit:* NASA/JPL/Space Science Institute
Full_Description
This image from the Cassini spacecraft shows a ghostly white streak, called a spoke, in Saturn's B ring. This is the first sighting of a spoke in nearly a year, and the first spoke seen by Cassini on the sunlit side of the rings. It is also the first spoke seen at high phase angle -- that is, the angle formed between the sun, the rings and Cassini. In this geometry, the feature appears white (instead of black) against the rings because the very small particles comprising the spoke preferentially scatter light in the forward direction (i.e. toward Cassini), making the spoke brighter than the background rings. The clear-filter image was taken in visible light with the Cassini spacecraft wide-angle camera on July 23, 2006, at a distance of approximately 692,000 kilometers (430,000 miles) from Saturn and at a sun-Saturn-spacecraf t, or phase, angle of 115 degrees. Image scale on the sky at the distance of Saturn is 38 kilometers (23 miles) per pixel. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo. For more information about the Cassini-Huygens mission visit http://saturn.jpl.n…. The Cassini imaging team homepage is at http://ciclops.org. *Credit:* NASA/JPL/Space Science Institute Full Description
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Date:
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July 26, 2006
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Keywords:
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B ring
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Keywords:
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spoke
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facet_what:
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Saturn
facet_what
Saturn
facet_what
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facet_what:
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Cassini
facet_what
Cassini
facet_what
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facet_what:
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Cassini-Huygens
facet_what
Cassini-Huygens
facet_what
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facet_what:
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Huygens Probe
facet_what
Huygens Probe
facet_what
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facet_what:
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Cassini Orbiter
facet_what
Cassini Orbiter
facet_what
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facet_what:
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Sun
facet_what
Sun
facet_what
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facet_what:
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Visible Light
facet_what
Visible Light
facet_what
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facet_where:
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Saturn
facet_where
Saturn
facet_where
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facet_where:
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Jet Propulsion Laboratory
facet_where
Jet Propulsion Laboratory
facet_where
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facet_where:
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California
facet_where
California
facet_where
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facet_where:
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Washington
facet_where
Washington
facet_where
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facet_where:
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Jet Propulsion Laboratory (JPL)
facet_where
Jet Propulsion Laboratory (JPL)
facet_where
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facet_where:
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Washington, D.C.
facet_where
Washington, D.C.
facet_where
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facet_when:
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July 23, 2006
facet_when
July 23, 2006
facet_when
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facet_when:
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July 26, 2006
facet_when
July 26, 2006
facet_when
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facet_when_year:
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2006
facet_when_year
2006
facet_when_year
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UID:
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SPD-SATRN-2216
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original url:
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original_url
original url
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