Notanban
Star, position:	Grissom, III
Location:	Grissom / Armstrong / Milky Way Galaxy
Satellite(s):	Solcrum
Gravity:	1.1 G
Diameter:	73,314 km
Day length:	16.9 Earth hours
Year length:	789 Earth days
Atmosphere:	N/A
Temperature:	N/A
Adjective:	Notanbanarian
Population:	Constantly shifting
Species:	Prothean Human Asari Turian Salarian Krogan Hanar Drell Elcor Volus Vorcha
Societal approximation:	Uninhabited
Affiliation:	Prothean Empire Geth Heretics (briefly) Systems Alliance (briefly)
Capital:	None

Notanban is a gas giant and the third planet of the Grissom system of the Armstrong cluster. Multiple attempts to mine its surface for minerals have been made, but the native shoals of tiny ammonia-based lifeforms that inhabit the gas giant, combined with the intense heat of Grissom, have made such efforts impossible.