Collection:
NASA Planetary Photo Journal Collection Collection NASA Planetary Photo Journal Collection Collection
Title:
Changes at Pillan Patera Title Changes at Pillan Patera Title
Original Caption Released with Image:
Dramatic changes have occurred at the volcanically active Pillan Patera region of Jupiter's moon Io over the past three years, as seen in this set of three images taken by NASA¹s Galileo spacecraft. The image on the left was taken in April 1997. The middle image shows the same area in September 1997 Original_Caption_Rel eased_with_Image Dramatic changes have occurred at the volcanically active Pillan Patera region of Jupiter's moon Io over the past three years, as seen in this set of three images taken by NASA¹s Galileo spacecraft. The image on the left was taken in April 1997. The middle image shows the same area in September 1997 Original Caption Released with Image
Original Caption Released with Image:
after a huge eruption occurred. The eruption produced the large, dark deposit just above and to the right of the center. The deposit, which is 400 kilometers (250 miles) in diameter, surrounds Pillan Patera and covers part of the bright red ring, which is the deposit from Pele¹s plume. The image on the right was acquired in July 1999 and is our best view of the region since 1997. It shows changes that have taken place on the surface since the eruption almost two years ago. The red material from Pele, which probably contains some form of sulfur, has started to cover, but has not yet entirely obscured, the dark material around Pillan. This may indicate that the plumes of both Pillan and Pele are still active. This image also shows that a small, unnamed volcano to the right of Pillan has erupted, depositing dark material surrounded by a yellow ring, which is most visible where it covers some of the dark material from Pillan's 1997 eruption. Some of the color differences between the three images are the effects of different lighting conditions when the images were taken. The apparent change in brightness of the dark feature in the lower left corner (Babbar Patera) and of parts of Pele's red plume deposit, are thought to be due to changes in illumination. However, such illumination changes cannot explain the dramatic changes seen at Pillan. Filters in red, green, and violet wavelengths were combined to produce these images. The color range is slightly enhanced from what the human eye might see at Io. North is to the top of the picture, and the Sun illuminates the surface from the right on the first image, and from the left for the other two. The images are centered at 19 degrees south latitude and 250 degrees west longitude and cover an area approximately 1,650 kilometers wide and 1,750 kilometers high (1,025 miles and 1,090 miles). The resolution of the images on the left and right is about 12 kilometers (7 miles) per picture element. The middle image has a slightly better resolution of about 5 kilometers (3 miles) per picture element. The images taken on April 4, 1997 were from a range of 600,486 kilometers (375,304 miles) by Galileo¹s camera. The images taken on September 19, 1997, were from a range of 505,628 kilometers (316,017 miles). The July 2, 1999 images were taken from a distance of 585,452 kilometers (365,908 miles). The Jet Propulsion Laboratory, Pasadena, CA manages the Galileo mission for NASA's Office of Space Science, Washington, DC. JPL is a division of the California Institute of Technology, Pasadena, CA. This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at http://www.jpl.nasa.gov/galileo/sepo . Original_Caption_Rel eased_with_Image after a huge eruption occurred. The eruption produced the large, dark deposit just above and to the right of the center. The deposit, which is 400 kilometers (250 miles) in diameter, surrounds Pillan Patera and covers part of the bright red ring, which is the deposit from Pele¹s plume. The image on the right was acquired in July 1999 and is our best view of the region since 1997. It shows changes that have taken place on the surface since the eruption almost two years ago. The red material from Pele, which probably contains some form of sulfur, has started to cover, but has not yet entirely obscured, the dark material around Pillan. This may indicate that the plumes of both Pillan and Pele are still active. This image also shows that a small, unnamed volcano to the right of Pillan has erupted, depositing dark material surrounded by a yellow ring, which is most visible where it covers some of the dark material from Pillan's 1997 eruption. Some of the color differences between the three images are the effects of different lighting conditions when the images were taken. The apparent change in brightness of the dark feature in the lower left corner (Babbar Patera) and of parts of Pele's red plume deposit, are thought to be due to changes in illumination. However, such illumination changes cannot explain the dramatic changes seen at Pillan. Filters in red, green, and violet wavelengths were combined to produce these images. The color range is slightly enhanced from what the human eye might see at Io. North is to the top of the picture, and the Sun illuminates the surface from the right on the first image, and from the left for the other two. The images are centered at 19 degrees south latitude and 250 degrees west longitude and cover an area approximately 1,650 kilometers wide and 1,750 kilometers high (1,025 miles and 1,090 miles). The resolution of the images on the left and right is about 12 kilometers (7 miles) per picture element. The middle image has a slightly better resolution of about 5 kilometers (3 miles) per picture element. The images taken on April 4, 1997 were from a range of 600,486 kilometers (375,304 miles) by Galileo¹s camera. The images taken on September 19, 1997, were from a range of 505,628 kilometers (316,017 miles). The July 2, 1999 images were taken from a distance of 585,452 kilometers (365,908 miles). The Jet Propulsion Laboratory, Pasadena, CA manages the Galileo mission for NASA's Office of Space Science, Washington, DC. JPL is a division of the California Institute of Technology, Pasadena, CA. This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at http://www.jpl.nasa.gov/galileo/sepo . Original Caption Released with Image
Addition Date:
1999-10-08 Addition_Date 1999-10-08 Addition Date
Produced By:
University of Arizona Produced_By University of Arizona Produced By
Mission:
Galileo Mission Galileo Mission
Spacecraft:
Galileo Orbiter Spacecraft Galileo Orbiter Spacecraft
Target Name:
Io Target_Name Io Target Name
Is a satellite of:
Jupiter Is_a_satellite_of Jupiter Is a satellite of
Instrument:
Solid-State Imaging Instrument Solid-State Imaging Instrument
Product Size:
1040 samples x 349 lines Product_Size 1040 samples x 349 lines Product Size
Primary Data Set:
Galileo EDRs Primary_Data_Set Galileo EDRs Primary Data Set
Producer ID:
P50595 MRPS95299 Producer_ID P50595 MRPS95299 Producer ID
facet_what:
Sun facet_what Sun facet_what
facet_what:
Moon facet_what Moon facet_what
facet_what:
Jupiter facet_what Jupiter facet_what
facet_what:
Galileo facet_what Galileo facet_what
facet_what:
Galileo Orbiter facet_what Galileo Orbiter facet_what
facet_what:
Solid-State Imaging facet_what Solid-State Imaging facet_what
facet_what:
Io facet_what Io facet_what
facet_what:
Patera facet_what Patera facet_what
facet_where:
Jet Propulsion Laboratory facet_where Jet Propulsion Laboratory facet_where
facet_where:
Jupiter facet_where Jupiter facet_where
facet_where:
Arizona facet_where Arizona facet_where
facet_where:
California facet_where California facet_where
facet_where:
Washington facet_where Washington facet_where
facet_where:
Jet Propulsion Laboratory (JPL) facet_where Jet Propulsion Laboratory (JPL) facet_where
facet_when:
April 4, 1997 facet_when April 4, 1997 facet_when
facet_when:
April 1997 facet_when April 1997 facet_when
facet_when:
September 19, 1997 facet_when September 19, 1997 facet_when
facet_when:
July 1999 facet_when July 1999 facet_when
facet_when:
September 1997 facet_when September 1997 facet_when
facet_when:
July 2, 1999 facet_when July 2, 1999 facet_when
facet_when_year:
1999 facet_when_year 1999 facet_when_year
facet_when_year:
1997 facet_when_year 1997 facet_when_year
Image #:
PIA02501 Image_# PIA02501 Image #
UID:
SPD-PHOTJ-PIA02501 UID SPD-PHOTJ-PIA02501 UID
orignial url:
http://photojournal… orignial_url http://photojournal… orignial url

Changes at Pillan Patera

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Changes at Pillan Patera