Barnacle Bill (Martian rock)

Barnacle Bill rock

Sojourner rover next to the "Barnacle Bill" rock
Feature type	Rock
Coordinates	19°20′N 33°33′W / 19.33°N 33.55°W / 19.33; -33.55Coordinates: 19°20′N 33°33′W / 19.33°N 33.55°W / 19.33; -33.55

Barnacle Bill is a 40-centimetre (16 in) rock on Mars in Ares Vallis. It was the first rock on Mars analyzed by the Sojourner rover using its Alpha Proton X-ray Spectrometer. The encounter occurred during Sol 3 of the Mars Pathfinder mission on the surface of Mars and took ten hours to complete.

"Barnacle Bill" rock - close-up

Early analysis of data sent from Sojourner led scientists to speculate that the rock was andesite.

The name was inspired in mission scientists by barnacle-like structures on the rock that appeared in transmitted photos.

See also[]

• List of rocks on Mars
• Yogi Rock

External links[]

• Mars Pathfinder Science Results

Notable rocks on Mars

Adirondack (Spirit)	Barnacle Bill (Sojourner)	Bathurst Inlet (Curiosity)	Big Joe (Viking)	Block Island (Opportunity) M	Bounce (Opportunity)	Coronation (Curiosity)	El Capitan (Opportunity)
Esperance (Opportunity)	Goulburn (Curiosity)	Heat Shield (Opportunity) M	Home Plate (Spirit)	Hottah (Curiosity)	Jake Matijevic (Curiosity)	Last Chance (Opportunity)	Link (Curiosity)
Mackinac Island (Opportunity) M	Mimi (Spirit)	Oileán Ruaidh (Opportunity) M	Pot of Gold (Spirit)	Rocknest 3 (Curiosity)	Shelter Island (Opportunity) M	Tintina (Curiosity)	Yogi (Sojourner)
M = Meteorite - ( This box: view talk )

This article about the planet Mars or its moons is a stub. You can help Wikipedia by .

• v
• t

This article about an extraterrestrial geological feature is a stub. You can help Wikipedia by .

• v
• t