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Collection:
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NASA Planetary Photo Journal Collection
Collection
NASA Planetary Photo Journal Collection
Collection
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Title:
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Hellas Planitia
Title
Hellas Planitia
Title
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Original Caption Released with Image:
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A color image of the Hellas Planitia region of Mars; north toward top. The scene shows the Hellas plain within the 1,800- km-diameter Hellas basin, an ancient impact basin (and the largest basin on Mars) formed when a large projectile (asteroid, comet, meteor) hit the surface.
This image is a composite of Viking medium-resolution images in black and white and low-resolution images in color. The image extends from latitude 60 degrees S. to 20 degrees S. and from longitude 250 degrees to 320 degrees. Mercator projection is used between latitudes 20 degrees S. and 30 degrees S.; Lambert projection is used below latitude 30 degrees S.
The exact diameter of the ancient Hellas basin is difficult to determine because large portions of the rim are missing to the northeast and southwest. In addition several large patera or low volcanoes (Tyrrhena, Hadriaca, Amphitrites) occur along or near the rim and their flows have partially buried the older impact deposits. Outside the rim are several large, arcuate, inward-facing escarpments which could be remnants of multiple rings. The plains of Hellas are very complex; fluvial channels drain into the basin and the plains have been described as being a mixture of fluvial, lacustrine, glacial, eolian, and volcanic deposits. Frequent dust storms occur within the basin.
Original_Caption_Rel eased_with_Image
A color image of the Hellas Planitia region of Mars; north toward top. The scene shows the Hellas plain within the 1,800- km-diameter Hellas basin, an ancient impact basin (and the largest basin on Mars) formed when a large projectile (asteroid, comet, meteor) hit the surface.
This image is a composite of Viking medium-resolution images in black and white and low-resolution images in color. The image extends from latitude 60 degrees S. to 20 degrees S. and from longitude 250 degrees to 320 degrees. Mercator projection is used between latitudes 20 degrees S. and 30 degrees S.; Lambert projection is used below latitude 30 degrees S.
The exact diameter of the ancient Hellas basin is difficult to determine because large portions of the rim are missing to the northeast and southwest. In addition several large patera or low volcanoes (Tyrrhena, Hadriaca, Amphitrites) occur along or near the rim and their flows have partially buried the older impact deposits. Outside the rim are several large, arcuate, inward-facing escarpments which could be remnants of multiple rings. The plains of Hellas are very complex; fluvial channels drain into the basin and the plains have been described as being a mixture of fluvial, lacustrine, glacial, eolian, and volcanic deposits. Frequent dust storms occur within the basin.
Original Caption Released with Image
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Addition Date:
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1998-06-08
Addition_Date
1998-06-08
Addition Date
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Produced By:
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U.S. Geological Survey
Produced_By
U.S. Geological Survey
Produced By
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Mission:
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Viking
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Spacecraft:
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Viking Orbiter 1
Spacecraft
Viking Orbiter 1
Spacecraft
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Spacecraft:
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Viking Orbiter 2
Spacecraft
Viking Orbiter 2
Spacecraft
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Target Name:
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Mars
Target_Name
Mars
Target Name
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Is a satellite of:
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Sol (our sun)
Is_a_satellite_of
Sol (our sun)
Is a satellite of
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Product Size:
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8292 samples x 6485 lines
Product_Size
8292 samples x 6485 lines
Product Size
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Primary Data Set:
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Viking EDRs
Primary_Data_Set
Viking EDRs
Primary Data Set
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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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Mars
facet_what
Mars
facet_what
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facet_what:
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Viking
facet_what
Viking
facet_what
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facet_what:
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Viking 1 Orbiter
facet_what
Viking 1 Orbiter
facet_what
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facet_what:
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Viking 2 Orbiter
facet_what
Viking 2 Orbiter
facet_what
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facet_where:
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Mars
facet_where
Mars
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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Goddard Space Flight Center (GSFC)
facet_where
Goddard Space Flight Center (GSFC)
facet_where
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facet_where:
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Hellas Planitia, Mars
facet_where
Hellas Planitia, Mars
facet_where
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Image #:
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PIA00416
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UID:
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SPD-PHOTJ-PIA00416
UID
SPD-PHOTJ-PIA00416
UID
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orignial url:
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orignial_url
orignial url
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