Table:
text: Smithsonian Astrophysical Observatory
History
Remote stations
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

text: Smithsonian Astrophysical Observatory
History
Remote stations
Station Type_ Latitude Longitude El_m Opened Closed Coordinates_
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

text: Smithsonian Astrophysical Observatory
History
Remote stations
Station Type_ Latitude Longitude El_m Opened Closed Coordinates_
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, , Space Track

Question: When was the last recorded observatory opening date for the Smithsonian Astrophysical Observatory?