What is the name of the shape generated by the vertices of the Soviet pennant on the Luna 2 spacecraft? Is it an polyhedron?

Question

xkcd 2125 titled "Luna 2" refers to the object shown below. All faces seem to be pentagons. (found in this question.)

Copy of the Soviet pennant sent on the Luna 2 probe to the moon, at the Kansas Cosmosphere, Source

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Question: What is the name of the polyhedral shape of the Soviet pennant on the Luna 2 spacecraft?

note: This question is about the shape without the spherical caps, the way that the underlying shape of a football is a truncated icosahedron. In this case though I am not sure if this shape will be a polyhedron or not as the five vertices of the pentagonal faces may not lay in a plane.

"Comparison of a truncated icosahedron with the typical appearance of a football/soccer ball." Source

Answer 1

as a 72 faced object, it's a canonical pentagonal heptacontakaidihedron or dokaiheptacontaheron

In Conway terms, it's a spherical quinto dodecahedron 'C969qD' play with it here

However, I've not seen much about quinto outside the wikidpedia page and that viewer, so I'm no longer so sure about it. Another Conway recipe, 't5oD' is very similar.

Answer 2

Ball.

In the collection of our museum there are two unique samples that were delivered to the moon in the area of ​​the Sea of ​​Rains near Aristill, Archimedes and Autolycus. These two balls consisted of pentagonal steel segments. A larger ball (150 mm) was installed on the third stage, a smaller ball (90 mm) - on a container with equipment. For each ball there were 72 pentagons of two types - regular (12 pcs.) And irregularly shaped (60 pcs.). Inside the hollow balls housed explosives. There was a shock fuse that caused luck on the land of the moon. With the explosion of the pennants scattered in all directions, like shards. Falling speed, and they should remain on the surface. All space pennants were minted at the Leningrad Mint.

From http://www.kosmo-museum.ru/news/lunnye-vympely-sssr