Crater Tadpoles
NASA/JPL/University of Arizona
Crater Tadpoles
ESP_053222_2150  Science Theme: Glacial/Periglacial Processes
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This impact crater looks amusingly like a tadpole because of the valley that was carved by water that used to fill it. When the water level inside the crater increased, it breached the crater wall, flowed outward and formed a valley. Sometimes, the water may flow in the opposite direction, like from a channel into a crater.

It is often difficult to differentiate between inlet and outlet channels, but water always flows downhill. In this particular case, we can infer that water is flowing outward because we have the necessary terrain-height information.

When studying these images in detail, scientists can gain a better understanding of the strength of the flooding water that carved the channels, and better understand the history of water activity in this region of Mars.

Written by: M. Ramy El-Maarry (audio: Tre Gibbs)  (5 February 2018)

This is a stereo pair with ESP_052945_2150.
 
Acquisition date
03 December 2017

Local Mars time:
15:12

Latitude (centered)
34.797°

Longitude (East)
17.397°

Range to target site
328.4 km (205.2 miles)

Original image scale range
32.9 cm/pixel (with 1 x 1 binning) so objects ~99 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
27.9°

Phase angle:
14.8°

Solar incidence angle
42°, with the Sun about 48° above the horizon

Solar longitude
96.0°, Northern Summer

For non-map projected images
North azimuth:  94°
Sub-solar azimuth:  4.6°
JPEG
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

JP2
Black and white
map-projected   (759MB)

IRB color
map-projected   (380MB)

JP2 EXTRAS
Black and white
map-projected  (330MB)
non-map           (283MB)

IRB color
map projected  (98MB)
non-map           (236MB)

Merged IRB
map projected  (218MB)

Merged RGB
map-projected  (209MB)

RGB color
non map           (224MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

USAGE POLICY
All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
NASA/JPL/University of Arizona

POSTSCRIPT
NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.