when was the last recorded opening date of an observatory?
1938
col : station | type | latitude | longitude | el. (m) | opened | closed | coordinates row 1 : mount wilson, california | solar | 34º13'n | 118º56'w | 1737 | 1908 | 1920 | 34°13′s 118°56′w / 34.2 row 2 : hump mountain, north carolina | solar | 36º8'n | 82º0'w | 1500 | 1917 | 1918 | 36°8′n 82°0′w / 36. row 3 : calama, chile | solar | 22º28's | 68º56'w | 2250 | 1918 | 1920 | 22°28′s 68°56′w / 22.4 row 4 : mount montezuma, chile | solar | 22º40's | 68º56'w | 2711 | 1920 | ? | 22°40′s 68°56′w / 22.6 row 5 : mount harquahala, arizona | solar | 33º48'n | 113º20'w | 1721 | 1920 | 1925 | 33°48′n 113°20′w / 33. row 6 : table mountain, california | solar | 34º22'n | 117º41'w | 2286 | 1925 | 1962 | 34°22′n 117°41′w / 34.3 row 7 : mount brukkaros, namibia | solar | 25º52's | 17º48'e | 1586 | 1926 | 1931 | 25°52′s 17°48′e / 25.8 row 8 : mount saint catherine, egypt | solar | 28º31'n | 33º56'e | 2591 | 1934 | 1937 | 28°31′n 33°56′e / 28.517 row 9 : burro mountain, new mexico | solar | 32º40'n | 108º33'w | 2440 | 1938 | 1946 | 32°40′n 108°33′w / 32.6 row 10 : organ pass, new mexico | space track | 32º25'n | 253º27'e |  |  |  | 32°25′n 106°33′w / 32.4 row 11 : olifantsfontein, south africa | space track | 25º58's | 28º15'e |  |  |  | 25°58′s 28°15′e / 25.96 row 12 : woomera, australia | space track | 31º06's | 136º46'e |  |  |  | 31°06′s 136°46′e / 31. row 13 : cadiz, spain | space track | 36º28'n | 353º48'e |  |  |  | 36°28′n 6°12′w / 36.467 row 14 : shiraz, iran | space track | 29º38'n | 52º31'e |  |  |  | 29°38′n 52°31′e / 29.63 row 15 : curaçao, netherlands west indies | space track | 12º05'n | 291º10'e |  |  |  | 12°05′n 68°50′w / 12.08 row 16 : jupiter, florida | space track | 27º01'n | 279º53'e |  |  |  | 27°01′n 80°07′w / 27.017 row 17 : haleakala, hawaii | space track | 20º43'n | 203º45'e |  |  |  | 20°43′n 156°15′w / 20.7 row 18 : villa dolores, argentina | space track | 31º57'n | 294º54'e |  |  |  | 31°57′n 65°06′e / 31.950 row 19 : mitaka, japan | space track |  |  |  |  |  |  row 20 : nani tal, india | space track |  |  |  |  |  |  row 21 : arequipa, peru | solar,\nspace track |  |  |  |  |  |
when was the last recorded opening date of an observatory?
Station Type Latitude Longitude El. (m) Opened Closed Coordinates
Mount Wilson, California Solar 34º13'N 118º56'W 1737 1908 1920 34°13′S 118°56′W﻿ / ﻿34.217°S 118.933°W
Hump Mountain, North Carolina Solar 36º8'N 82º0'W 1500 1917 1918 36°8′N 82°0′W﻿ / ﻿36.133°N 82.000°W
Calama, Chile Solar 22º28'S 68º56'W 2250 1918 1920 22°28′S 68°56′W﻿ / ﻿22.467°S 68.933°W
Mount Montezuma, Chile Solar 22º40'S 68º56'W 2711 1920 ? 22°40′S 68°56′W﻿ / ﻿22.667°S 68.933°W
Mount Harquahala, Arizona Solar 33º48'N 113º20'W 1721 1920 1925 33°48′N 113°20′W﻿ / ﻿33.800°N 113.333°W
Table Mountain, California Solar 34º22'N 117º41'W 2286 1925 1962 34°22′N 117°41′W﻿ / ﻿34.367°N 117.683°W
Mount Brukkaros, Namibia Solar 25º52'S 17º48'E 1586 1926 1931 25°52′S 17°48′E﻿ / ﻿25.867°S 17.800°E
Mount Saint Catherine, Egypt Solar 28º31'N 33º56'E 2591 1934 1937 28°31′N 33°56′E﻿ / ﻿28.517°N 33.933°E
Burro Mountain, New Mexico Solar 32º40'N 108º33'W 2440 1938 1946 32°40′N 108°33′W﻿ / ﻿32.667°N 108.550°W
Organ Pass, New Mexico Space Track 32º25'N 253º27'E 32°25′N 106°33′W﻿ / ﻿32.417°N 106.550°W
Olifantsfontein, South Africa Space Track 25º58'S 28º15'E 25°58′S 28°15′E﻿ / ﻿25.967°S 28.250°E
Woomera, Australia Space Track 31º06'S 136º46'E 31°06′S 136°46′E﻿ / ﻿31.100°S 136.767°E
Cadiz, Spain Space Track 36º28'N 353º48'E 36°28′N 6°12′W﻿ / ﻿36.467°N 6.200°W
Shiraz, Iran Space Track 29º38'N 52º31'E 29°38′N 52°31′E﻿ / ﻿29.633°N 52.517°E
Curaçao, Netherlands West Indies Space Track 12º05'N 291º10'E 12°05′N 68°50′W﻿ / ﻿12.083°N 68.833°W
Jupiter, Florida Space Track 27º01'N 279º53'E 27°01′N 80°07′W﻿ / ﻿27.017°N 80.117°W
Haleakala, Hawaii Space Track 20º43'N 203º45'E 20°43′N 156°15′W﻿ / ﻿20.717°N 156.250°W
Villa Dolores, Argentina Space Track 31º57'N 294º54'E 31°57′N 65°06′E﻿ / ﻿31.950°N 65.100°E
Mitaka, Japan Space Track
Nani Tal, India Space Track
Arequipa, Peru Solar,\nSpace Track
1938