• MAA-016: Gear Wheel

- Image Analysis Report

Image Analysis Report

IMAGE DETAILS

MAA Report Ref: MAA-016

Report date: July-August 2017

Research Status: Open - Possible mechanical artefact

Description: Gear Wheel
Approximate size: 10 cm

Mission: Spirit Rover
Location: Gusev Crater

Found by: Larry Roy

Image date: Sol 288 Oct 2004
Image credit: NASA/JPL/Cornell

Graphics/image editing: Mars Archaeology Archive

Image source: http://marsrovers.nasa.gov/gallery/all/2/p/288/2P151930534EFF8987P2418R1M1.HTML

OBSERVATIONS

The resemblance to a cog mechanism such as that which exists on a gear wheel (maa-016.4) is very strong. The fact also that crinoid fossils can also resemble such a shape (MAA-016.3) should be noted.

POTENTIAL FOR AN ARTIFICIAL OBJECT

Regular, equally-spaced and sized spokes protruding from a circular rim. Circular centre. No object of similar character in vicinity suggesting uniqueness.

COMMON EXPLANATION

Optical illusion. Ventifact.

MAA-016.2 Gear Wheel: from a distance - Sol 288.

Image credit: NASA/JPL/Cornell

http://marsrovers.nasa.gov/gallery/all/2/p/288/2P151930534EFF8987P2418R1M1.HTML

MAA-016.1 Gear Wheel: close-up - Sol 288.

Image credit: NASA/JPL/Cornell

http://marsrovers.nasa.gov/gallery/all/2/p/288/2P151930534EFF8987P2418R1M1.HTML

MAA-016.3 Earth fossils: Crinoid stems.

MAA-016.4 Earth machinery: Cog Wheel.