Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Latitude | Longitude | Diameter (km) | Year named | Name origin |
| --- | --- | --- | --- | --- | --- |
| Aife Fossae | 67.0N | 131.0E | 280.0 | 1997.0 | Irish warrior deity. |
| Ajina Fossae | 45.0S | 258.0E | 300.0 | 1997.0 | Tajik evil spirit. |
| Albasty Fossae | 9.0S | 336.5E | 500.0 | 1997.0 | Tartar evil spirit. |
| Arianrod Fossae | 37.0N | 239.9E | 715.0 | 1985.0 | Celtic warrior queen. |
| Bellona Fossae | 38.0N | 222.1E | 855.0 | 1985.0 | Roman war goddess, wife of Mars. |
| Brynhild Fossae | 26.0S | 18.0E | 1800.0 | 1997.0 | Norse warrior maiden. |
| Enyo Fossae | 62.0S | 351.0E | 700.0 | 1991.0 | Greek war goddess. |
| Fea Fossae | 27.5N | 224.0E | 620.0 | 1997.0 | Gaelic war goddess. |
| Felesta Fossae | 34.5N | 46.5E | 570.0 | 1991.0 | Amazon queen in Scythian epic tales. |
| Friagabi Fossae | 50.2N | 109.5E | 141.0 | 1985.0 | Old English goddess, connected with Mars. |
| Gulaim Fossae | 5.0S | 329.0E | 800.0 | 1997.0 | Karakalpak amazon leader. |
| Hanekasa Fossae | 29.0N | 148.5E | 700.0 | 1997.0 | Sanema (Venezuela) amazon warrior. |
| Hildr Fossa | 45.4N | 159.4E | 677.0 | 1985.0 | Norse mythological warrior. |
| Ilbis Fossae | 71.9N | 254.6E | 512.0 | 1985.0 | Yakutian (Siberia) goddess of bloodshed. |
| Karra-ma-hte Fossae | 28.0N | 342.0E | 1800.0 | 1997.0 | Latvian warrior goddess. |
| Khosedem Fossae | 13.0S | 303.0E | 1800.0 | 1997.0 | Ketian (Yenisey R.) main evil goddess. |
| Magura Fossae | 12.0S | 332.5E | 600.0 | 1997.0 | E. Slavic winged warrior maiden. |
| Manto Fossae | 63.6N | 64.9E | 536.0 | 1991.0 | Greek war goddess. |
| Minerva Fossae | 64.5N | 252.5E | 0.0 | 1985.0 | Roman goddess of war. |
| Mist Fossae | 39.5N | 247.3E | 244.0 | 1985.0 | Norse Valkyrie. Changed to Mist Chasma. |
| Naguchitsa Fossae | 35.6S | 159.3E | 730.0 | 2003.0 | Adygan evil warrior, old woman with iron teeth. |
| Naijok Fossae | 70.2S | 337.0E | 450.0 | 1997.0 | Dinka (Sudan) evil deity. |
| Namjyalma Fossae | 2.5N | 2.7E | 560.0 | 2000.0 | Tibetan victorious mother. |
| Narundi Fossae | 66.5S | 329.0E | 700.0 | 1997.0 | Elam goddess of victory. |
| Nike Fossae | 59.5S | 340.0E | 800.0 | 1991.0 | Greek goddess of victory. |
| Penthesilea Fossa | 12.0S | 214.0E | 1700.0 | 1997.0 | Greek amazon queen. |
| Perunitsa Fossae | 10.0S | 307.0E | 1300.0 | 1997.0 | E. Slavic winged warrior maiden. |
| Rangrid Fossae | 62.7N | 356.4E | 243.0 | 1985.0 | Norse Valkyrie. |
| Saykal Fossae | 73.0N | 139.0E | 300.0 | 1997.0 | Kyrgyz warrior maiden. |
| Sigrun Fossae | 50.5N | 18.0E | 970.0 | 1985.0 | Norse Valkyrie. |
| Valkyrie Fossae | 58.2N | 7.0E | 357.0 | 1991.0 | Norse battle maidens. |
| Yenkhoboy Fossae | 48.0S | 7.0E | 900.0 | 1997.0 | Buryatian warrior sisters. |
| Yuzut-Arkh Fossae | 48.0N | 224.0E | 550.0 | 1997.0 | Khakas (S. Siberia) evil deity. |
| Zheztyrnak Fossae | 67.5S | 182.0E | 180.0 | 2000.0 | Kazakh evil deity, "copper claw" maiden. |
Question:
COunt the average Diameter (km) which has ketian (yenisey r.) main evil goddess.?
Answer:
1800.0