Theon Senior

Origin of the name

Of Smyrna; Greek mathematician and astronomer (c. A.D. 130).

When to observe it

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Nearby

• Theon Junior 50 km
• Delambre 69 km
• D'Arrest 97 km
• Schmidt 115 km
• Dionysius 123 km
• De Morgan 126 km
• Taylor 140 km
• Ritter 141 km