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Orbiting Solar Observatory
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Orbiting Solar Observatory
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This page contains philatelic information on the Orbiting Solar Observatory (OSO) satellites. Catalog numbers, years of issue, and notes on the satellites featured are given when available. If readers know of additional information or images, please contact the authors using the e-mail addresses at the bottom of this page.
| Launch information (found in the solar-observing satellites page) |
Launch covers, anniversary-of-launch covers, and launch-related event covers (farther below) |
Postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.) (immediately below) |
|---|---|---|
| OSO | OSO | OSO |
Below is a list of OSO-series postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).
| Country | Catalog Number* | Type of Item** | Year of Issue | Notes on Content |
|---|---|---|---|---|
| OSO | ||||
| Antigua and Barbuda | 702 (BL70) | In (lower-center) margin of SS1 | 1983 | OSO-8 |
| Barbuda | 577 (BL74) | In (lower-center) margin of SS1, Antigua 702 overprinted | 1983 | OSO-8 |
| Central Africa Republic | 1175b (Mi1884) | One of MS4 (1175 (a-d)) | 1997 | OSO-1 |
| Gambia | 2269d (Mi3708) | One of MS6 (2269 (a-f)) | 2000 | OSO-1/71 |
| Gambia | 2269d essay | One of MS6 (2269 imperforate essay (a-f)) | 2000 | OSO-1/71 |
| Guinea Republic | iMi4252a fdc | Cachet on imperforate MS4 FDC | 2006 | OSO-1/71 |
| Micronesia | 344b (Mi722) | One of MS20 (344 (a-t)) | 1999 | OSO-1 |
| Panama | 457B (Mi780) | 1964 | OSO-1 | |
| Paraguay | 922 (Mi1522) i922 (Mi1530) | Changed colors on imperforate | 1966 | OSO-1/71 |
| Paraguay | 926 (Mi1526) i926 (Mi1534) | Changed colors on imperforate | 1966 | OSO-1/71 |
| Paraguay | 926a (BL79) i926a (BL80) | SS1, changed colors on imperforate | 1966 | OSO-1/71 |
| Satellite Beach FL (U.S.) | Local | set-C03 (blue) | 1964 | OSO-1/71 |
| Satellite Beach FL (U.S.) | Local | set-C03 (blue) overprinted in gold | 1965 | OSO-1/71 |
| Sharjah | 48 (Mi60) | 1964 | OSO-1/71 | |
| Sharjah | 48A | 48 overprinted new currency | 1967 | OSO-1/71 |
| Tanzania | 1323 (Mi?) | 1994 | OSO-8 | |
| Togo | 501 (Mi447) | 1964 | OSO-1/71 | |
| Togo | 503 (Mi449) | 1964 | OSO-1/71 | |
| Togo | 505a (BL17) | Imperforate MS4 (502-505) | 1964 | OSO-1/71 |
| Umm Al Qiwain | Mi78 | 1966 | AOSO2 | |
| Umm Al Qiwain | Mi89 | Mi78 overprinted new currency | 1967 | AOSO2 |
| United Nations | 112-113 fdc (Mi122-123 fdc) | (Orbit) cachet on FDC | 1962 | OSO-1/71 |
| United States | None | (Centennial?) cachet on OAO-2 launch cover | 1968 | OSO-1/71 |
| United States | None | (Centennial?) cachet on OGO-5 launch cover | 1968 | OSO-1/71 |
| Yemen Arab Republic | C90 (Mi1701) C90_ds | Also imperforate deluxe sheet | 1982 | OSO-1/71 |
*Scott catalog number, unless prefixed with Mi or BL for Michel; "i" prefix denotes imperforate version.
**SS# = souvenir sheet, MS# = miniature sheet, where # = number of stamps in sheet, and the numbers in parentheses are the catalog numbers of the stamps in the sheet.
1OSO-1 — OSO-7 are all basically identical.
2The AOSO (Advanced OSO) program was canceled.
Below is a list of OSO-series launch covers, anniversary-of-launch covers, and launch-related event covers.
| Country | Cancel Date | Cancel Location | Type of Item | Notes on Content |
|---|---|---|---|---|
| OSO-1 | ||||
| United States | 1962-03-07 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet on cover | OSO-1 launch |
| United States | 1962-03-07 | Port Canaveral FL | (Goldcraft) cachet on cover, also insert | OSO-1 launch |
| OSO-2 | ||||
| United States | 1965-02-03 | Cape Canaveral FL | (SpaceCraft/Swanson) cachet on cover | OSO-2 launch |
| OSO-C | ||||
| United States | 1965-08-25 | Cape Canaveral FL | (SpaceCraft/Swanson) cachet on cover | OSO-C launch [failed] |
| OSO-3 | ||||
| United States | 1967-03-08 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet on cover | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL | (Orbit) cachet on cover | OSO-3 launch |
| OSO-4 | ||||
| United States | 1967-10-18 | Cape Canaveral FL | (SpaceCraft/Swanson) cachet on cover | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL | (Orbit) cachet on cover | OSO-4 launch |
| OSO-5 | ||||
| United States | 1969-01-22 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL | (Centennial?) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL | (Orbit) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Satellite Beach FL | (Rubber-stamp) cachet on cover | OSO-5 launch |
| OSO-6 | ||||
| United States | 1969-08-09 | Cape Canaveral FL | (Orbit) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet on cover | OSO-6 launch |
| OSO-7 | ||||
| United States | 1971-09-29 | Kennedy Space Center FL | (?) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Kennedy Space Center FL | (Space Voyage) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Kennedy Space Center FL | (Centennial?) cachet on cover | OSO-7 launch |
| OSO-8 | ||||
| United States | 1975-06-21 | Satellite Beach FL | (Rubber-stamp) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (Space Voyage) cachet on cover | OSO-8 launch |
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