Table:
text: List of geological features on Venus
Paterae
Paterae
Name_ Latitude Longitude Diameter_km Year_named Name_origin
Corday Patera 62.7N 40.2E 135.0 1991 Charlotte; French patriot (1768–1798).
Darclée Patera 37.4S 263.8E 15.0 2006 Hariclea; Romanian soprano singer (1860–1939).
Garland Patera 32.7N 206.8E 45.0 2006 Judy; American singer and actress (1922–1969).
Grizodubova Patera 16.7N 299.6E 50.0 1997 Valentina; Soviet aviatrix (1910–1993).
Hatshepsut Patera 28.1N 64.5E 118.0 1985 Egyptian pharaoh (1479 B.C.).
Hroswitha Patera 35.8N 34.8E 163.0 1985 German writer (c. A.D. 935-975).
Izumi Patera 50.0N 193.6E 74.0 1985 Sikibu; Japanese writer (974-1036).
Jaszai Patera 32.0N 305.0E 70.0 1997 Mary; Hungarian actress (1850–1926).
Jotuni Patera 6.5S 214.0E 100.0 1997 Maria; Finnish writer (1880–1943).
Keller Patera 45.0N 274.0E 69.0 1991 Helen; blind and deaf American writer (1880–1968).

Question: What is the origin of the name Keller Patera among the list of geological features on Venus?

Question: From the list of geological features in the Paterae sector of Venus: What is the diameter in km of the feature with longitude 40.2E?