Can somebody name a short story about a small group of human explorers in the Saturnian system that find an ice statue of an alien?
The statue is taller than a human, has wings, tall thin legs, long thin arms, and is facing Saturn. (Saturn never moves from its position in the sky because the moon is tidally locked with it.) It was built by an alien who visited (was stranded?) on the moon tens of thousands of years ago. The human explorers also find claw prints in the snow on Iapetus from when the alien walked around the moon. The claw prints form a several kilometers wide circle around the statue.
One of the humans imagines the alien was stranded alone on the moon and made a statue of itself to tell any later visitors about its loneliness.
The story was published in the early 1980's.