A Dragonfly-Shaped Crater
NASA/JPL/University of Arizona
A Dragonfly-Shaped Crater
ESP_048462_1585  Science Theme: Impact Processes


HICLIP

1080p (MP4)
720p (MP4)
Listen to the text

WALLPAPER

800  1024
1152  1280
1440  1600
1920  2048
2560  2880
2736  4500
4K  8K

HIFLYER

PDF, 11 x 17 in

HISLIDES

PowerPoint
Keynote
PDF
The broader scene for this image is the fluidized ejecta from Bakhuysen Crater to the southwest, but there’s something very interesting going on here on a much smaller scale.

A small impact crater, about 25 meters in diameter, with a gouged-out trench extends to the south. The ejecta (rocky material ejected from the crater) mostly extends to the east and west of the crater. This “butterfly” ejecta is very common for craters formed at low impact angles. Taken together, these observations suggest that the crater-forming impactor came in at a low angle from the north, hit the ground and ejected material to the sides.

The top of the impactor may have sheared off (“decapitating” the impactor) and continued downrange, forming the trench. We can’t prove that’s what happened, but this explanation is consistent with the observations. Regardless of how it formed, it’s quite an interesting-looking “dragonfly” crater!

Written by: Kirby Runyon (audio: Tre Gibbs)  (10 February 2017)

This is a stereo pair with ESP_048528_1585.
twitter  •  facebook  •  google+  •  tumblr
 
Acquisition date
27 November 2016

Local Mars time:
14:34

Latitude (centered)
-21.437°

Longitude (East)
16.697°

Range to target site
278.5 km (174.1 miles)

Original image scale range
55.7 cm/pixel (with 2 x 2 binning) so objects ~167 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
23.4°

Phase angle:
58.7°

Solar incidence angle
35°, with the Sun about 55° above the horizon

Solar longitude
269.6°, Northern Autumn

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  350.9°
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   (400MB)

IRB color
map-projected   (228MB)

JP2 EXTRAS
Black and white
map-projected  (217MB)
non-map           (185MB)

IRB color
map projected  (89MB)
non-map           (210MB)

Merged IRB
map projected  (473MB)

Merged RGB
map-projected  (431MB)

RGB color
non map           (199MB)
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.