Contrary to human observations, scientific measurements indicate a 4% albedo for this object. Its namesake "armada" included the Vega and Giotto space
Contrary to human observations, scientific measurements indicate a 4% albedo for this object. Its namesake "armada" included the Vega and Giotto spacecraft, which traveled through its coma and were the first to observe objects of its kind; the data from the spacecraft helped support the (*) "dirty snowball" hypothesis. This object is also the source for both the Eta Aquarid and Orionid meteor showers. It has a retrograde orbit around the Sun, and its period of 76 years was determined by its namesake English astronomer. For ten points, identify this short-period comet that can be seen with the naked eye.
Contrary to human observations, scientific measurements indicate a 4% albedo for this object.
Halley's Comet [accept 1P/Halley]