Table:
text: List of geological features on Venus
Planitia
Planitia
Name_ Latitude Longitude Diameter_km Year_named Name_origin
Aibarchin Planitia 73.0S 25.0E 1200.0 1997 Uzbek Alpamysh epic tale heroine.
Aino Planitia 40.5S 94.5E 4985.0 1982 Finnish heroine who became water spirit.
Akhtamar Planitia 27.0N 65.0E 2700.0 1997 Armenian epic heroine.
Alma-Merghen Planitia 76.0S 100.0E 1500.0 1997 Mongol/Tibet/Buryat Gheser epic tale heroine.
Atalanta Planitia 45.6N 165.8E 2050.0 1982 Greek mythical heroine.
Audra Planitia 59.8N 92.3E 1860.0 1991 Lithuanian sea mistress.
Bereghinya Planitia 28.6N 23.6E 3900.0 1985 Slavic water spirit.
Ganiki Planitia 40.0N 202.0E 5160.0 1985 Orochian (Siberia) water spirit, mermaid.
Guinevere Planitia 21.9N 325.0E 7520.0 1982 British, wife of Arthur.

Question: What is the diameter (km) of the feature of latitude 40.5 in the list of geological features on Venus Planitia?