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Orbiting Solar Observatory
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| OSO-1/6 type | OSO-7 | OSO-8 |
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Orbiting Solar Observatory
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| OSO-1/6 type | OSO-7 | OSO-8 |
This page contains philatelic information on the Orbiting Solar Observatory (OSO) series 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 elsewhere) |
Reference images (found elsewhere) |
Launch covers (including anniversary-of-launch covers, and launch-related event covers) (farther below) |
Other postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.) (immediately below) |
|---|---|---|---|
| OSO | OSO | OSO | OSO |
| OSO (on other than OSO launch covers) | AOSO [canceled] |
Below is a list of OSO-series satellite postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).
| Country | Catalog Number | Type of Item | Year of Issue | Notes on Content |
|---|---|---|---|---|
| Orbiting Solar Observatory (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 and Barbuda 702 overprinted | 1983 | OSO-8 |
| Central African Republic | 1175b (Mi1884A) i1175b (Mi1884B) | One of MS4 (1175 (a-d)) (Mi1883A-1886A) One of imperforate MS4 (i1175 (a-d)) (Mi1883B-1886B) | 1997 | "OSO-1" |
| Gambia | 2269d (Mi3707) i2269d | One of MS6 (2269 (a-f)) (Mi3704-3709) One of imperforate MS6 (i22693 (a-f)) | 2000 | OSO-1/6 type1 |
| Gambia | 2269d essay | One of MS6 (2269 imperforate essay (a-f)) | ||
| Gambia | i2269 fdc3 | Imperforate MS6 on FDC | ||
| Guinea Republic | Mi4252B_ms4 fdc | (Multi-color printed) cachet on FDC | 2006 | OSO-1/6 type1 |
| Micronesia | 344b (Mi722) | One of MS20 (344 (a-t)) (Mi721-740) | 1999 | "OSO-1" |
| Panama | 457B (Mi780) i457B | Imperforate | 1964 | "OSO-1" |
| Paraguay | 922 (Mi1522) i922 (Mi1530) | Imperforate with changed colors | 1966 | OSO-1/6 type1 |
| Paraguay | 919-923 fdc | One of five stamps on FDC | ||
| Paraguay | 926 (Mi1526) i926 (Mi1534) | Imperforate with changed colors | ||
| Paraguay | 926a (BL79) i926a (BL80) | On stamp of SS1 On stamp of imperforate SS1, changed colors | ||
| Paraguay | 926a fdc i926a fdc | SS1 and (red and black printed) cachet on FDC Imperforate SS1 and (red and black printed) cachet on FDC | ||
| Satellite Beach FL (USA) | Local | Set-C03 (blue) | 1964 | "OSO"-1/6 type1 |
| Satellite Beach FL (USA) | Local o/p | set-C03 (blue) overprinted in gold | 1965 | "OSO"-1/6 type1 |
| Satellite Beach FL (USA) | Local cover | Set-C03 and C08 (blue) (in cachet position) on local post cover | 1988 | "OSO"-1/6 type1 |
| Sharjah | 48 (Mi60A) i48 (Mi60B) | Imperforate | 1964 | OSO-1/6 type1 |
| Sharjah | 48_op (Mi60A_op) i48_op (Mi60B_op) | 48 overprinted new currency i48 overprinted new currency | 1967 | OSO-1/6 type1 |
| Sharjah | 48_op (Mi60_op) | 48 overprinted 1968 Olympics | 1968 | OSO-1/6 type1 |
| Sharjah | 48_op-double | 48 double overprinted 1968 Olympics | ||
| Spain | None | (Orange and blue and black printed) cachet on cover | 1984 | "OSO" (in text only) |
| Tanzania | 1323 (Mi2021) | 1994 | OSO-8 | |
| Togo | 501 (Mi447A) i501 (Mi447B) | Imperforate | 1964 | OSO-1/6 type1 |
| Togo | 503 (Mi449A) i503 (Mi449B) | Imperforate | ||
| Togo | 500-501+503 fdc | Two of three stamps on FDC | ||
| Togo | 500-505 fdc | Two of six stamps on FDC | ||
| Togo | 501-502+505 fdc | One of three stamps on FDC | ||
| Togo | 505a (BL17) | Imperforate MS4 (502-505) | ||
| Togo | 505a fdc | Imperforate MS4 on FDC | ||
| United Nations | 112-113 fdc (Mi122-123 fdc) | (Orbit Covers) cachet on FDC | 1962 | "OSO"-1/6 type1 |
| United States | None | (Astro Covers) cachet on cover | 1962 | "OSO" |
| United States United Nations | 1193 cover 112 cover | (Orbit Covers) cachet on cover | 1963 | "OSO"-1/6 type1 |
| United States | 1395 cover (Mi1832 cover) | (Black printed) cachet on cover; also annotated with satellites numbered | 1973 | [#15] OSO-8 |
| United States | 1529 fdc (Mi1136 fdc) | (GSFC Operation Kohoutek cyan rubber-stamp) cachet on FDC | 1974 | OSO-7 |
| United States | None | (GSFC Operation Kohoutek blue rubber-stamp) cachet on cover | 1974 | OSO-7 |
| United States | None | (Green and yellow and black printed) cachet on cover | 1977 | OSO-8 |
| United States | 1759 fdc 1710 cover | (Aeropex'77) cachet on FDC, also annotated cachet | 1978 1977 | "OSO" |
| United States | None | (GSFC multi-satellite blue rubber-stamp) cachet on cover | 1979 | "OSO"-1/6 type1 |
| United States | 1915 fdc (Mi1484 fdc) | (PCS golden-replica) insert from FDC, also front | 1981 | "Orbiting Solar Observatory" |
| Yemen Arab Republic | C90 (Mi1701) | 1982 | OSO-1/6 type1 | |
| Yemen Arab Republic | C90 ds | Deluxe sheet (C90) | ||
| Yemen Arab Republic | C90 proof | Chromalin proof | ||
| Advanced Orbiting Solar Observatory (AOSO) [canceled] | ||||
| Umm Al Qiwain | Mi78A Mi78B | Imperforate | 1966 | AOSO2 |
| Umm Al Qiwain | Mi78A-82A+BL5B fdc | One of five stamps on FDC | ||
| Umm Al Qiwain | Mi89A Mi89B | Mi78A overprinted new currency Mi78B overprinted new currency | 1967 | AOSO2 |
| Vanuatu | 1122a (Mi1593) | One of MS6 (1122 (a-f)) (BL80, Mi1593-1598) | 2021 | AOSO2 |
1OSO-1 — OSO-6 are all basically identical.
2The AOSO (Advanced OSO) program was canceled.
3The Gambia imperforate i2269 (also seen in i2269 fdc) does not perfectly match the perforated version 2269, but rather is quite similar to the essay 2269 essay. The authors believe that the perforated version 2269 includes the final design of these sheets that was actually issued.
Below is a list of OSO-series satellite launch covers (including anniversary-of-launch covers, and launch-related event covers).
| Country | Cancel Date | Cancel Location | Type of Item | Notes on Content |
|---|---|---|---|---|
| Orbiting Solar Observatory (OSO) | ||||
| 1962-03-07: OSO-1 | ||||
| United States | 1962-03-07 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-1 launch |
| United States | 1962-03-07 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet (and signature) on cover, also insert | OSO-1 launch |
| United States | 1962-03-07 | Port Canaveral FL | (Goldcraft) cachet on cover | OSO-1 launch |
| United States | 1962-03-07 | Port Canaveral FL | (Gordon? perforated sticker) cachet on (airmail) cover | OSO-1 launch (fantasy depiction) |
| United States | 1962-03-07 | Port Canaveral FL | (Sarzin) cachet on cover | OSO-1 launch |
| United States | 1962-03-07 | Port Canaveral FL | (Orange and black printed) cachet on cover | OSO-1 launch |
| United States | 1962-03-07 | Patrick AFB, FL | (C. Swanson purple rubber-stamp) cachet on cover | OSO-1 launch |
| United States | 1962-03-07 | Patrick AFB, FL | (C. Swanson green and purple rubber-stamp) cachet on (airmail) cover | OSO-1 launch |
| United States | 1962-03-07 | Patrick AFB, FL | (Orbit Covers, no logo) cachet (and signature) on cover | OSO-1 launch |
| United States | 1962-03-07 | Port Canaveral FL | (blank/no) cachet on cover | OSO-1 launch |
| United States | 1962-03-07 | Port Canaveral FL | (Red and black printed) cachet on cover | OSO-1 launch |
| 1965-02-03: OSO-2 | ||||
| United States | 1965-02-03 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet on cover, also insert or insert variation (slightly different line lengths) | OSO-2 launch |
| United States | 1965-02-03 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet (and signature) on cover, also insert or insert variation (slightly different line lengths) | OSO-2 launch |
| United States | 1965-02-03 | Cape Canaveral FL | (SpaceCraft/Swanson) cachet on cover, also insert or insert variation (slightly different line lengths) | OSO-2 launch |
| United States | 1965-02-03 | Cape Canaveral FL | (C. Swanson purple rubber-stamp) cachet on cover | OSO-2 launch |
| United States | 1965-02-03 | Cape Canaveral FL (hand cancel) | (Sarzin) cachet on cover | OSO-2 launch |
| United States | 1965-02-03 | Cape Canaveral FL (machine cancel) | (Sarzin) cachet on cover | OSO-2 launch |
| United States | 1965-02-03 | Cape Canaveral FL | (Black and dark-blue printed) cachet on cover | OSO-2 launch (but Ariel-1/2 type depicted) |
| United States | 1965-02-03 | Cape Canaveral FL | (Astro Covers) cachet on cover | OSO-2 launch |
| United States | 1965-02-03 | Cape Canaveral FL (machine cancel) | (Centennial) cachet on cover | OSO-2 launch |
| United States | 1965-02-03 | Cape Canaveral FL (hand cancel) | (Centennial) cachet on cover | OSO-2 launch |
| 1965-08-25: OSO-C [failed] | ||||
| United States | 1965-08-25 | Cape Canaveral FL | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-C launch [failed] |
| United States | 1965-08-25 | Cape Canaveral FL | (SpaceCraft/Swanson) cachet (and signature) on cover, also insert | OSO-C launch [failed] |
| United States | 1965-08-25 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-C launch [failed] |
| United States | 1965-08-25 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet (and signature) on cover, also insert | OSO-C launch [failed] |
| United States | 1965-08-25 | Cape Canaveral FL | (Celestial) cachet on cover | OSO-C launch [failed] |
| United States | 1965-08-25 | Cape Canaveral FL | (Sarzin) cachet on cover | OSO-C launch [failed]; also IQSY |
| United States | 1965-08-25 | Cape Canaveral FL | (Swanson/DuBeau? blue rubber-stamp and black typed) cachet on cover | OSO-C launch [failed] (not "OSO-3", as in text) |
| United States | 1965-08-25 | Cape Canaveral FL | (Swanson/DuBeau? blue rubber-stamp and black typed) cachet (slightly different) on cover | OSO-C launch [failed] (not "OSO-3", as in text) |
| United States | 1965-08-25 | Cape Canaveral FL | (Swanson/DuBeau? blue rubber-stamp) cachet on cover | OSO-C launch [failed] |
| United States | 1965-08-25 | Cape Canaveral FL | (Swanson/DuBeau? blue rubber-stamp) cachet (slightly different) on cover | OSO-C launch [failed] |
| 1967-03-08: OSO-3 | ||||
| United States | 1967-03-08 | Patrick AFB, FL | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL (hand cancel) | (Orbit Covers) cachet on cover | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL (machine cancel) | (Orbit Covers) cachet on cover | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL | (Sarzin) cachet on cover | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL | (Swanson/DuBeau? purple rubber-stamp) cachet on cover | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL | (Swanson/DuBeau? blue rubber-stamp) cachet on (airmail) cover | OSO-3 launch |
| United States | 1967-03-08 | Kennedy Space Center FL | (Swanson/DuBeau? red rubber-stamp and black typed) cachet on (airmail) cover | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL | (Centennial) cachet on cover | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL | (HJM black and black typed) cachet on cover | OSO-3 launch |
| United States | 1967-03-08 | Cape Canaveral FL | (Hand-written) cachet on cover | OSO-3 launch |
| 1967-10-18: OSO-4 | ||||
| United States | 1967-10-18 | Cape Canaveral FL (hand cancel) | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL (machine cancel) | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-4 launch |
| United States | 1967-10-18 | Patrick AFB, FL (hand cancel) | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-4 launch |
| United States | 1967-10-18 | Patrick AFB, FL (machine cancel) | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL (hand cancel) | (Orbit Covers) cachet on cover | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL (machine cancel) | (Orbit Covers) cachet on cover | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL | (Astro Covers) cachet on cover | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL | (Astro Covers, no logo) cachet (different text font) on cover | OSO-4 launch |
| United States | 1967-10-18 | Kennedy Space Center FL | (Astro Covers, no logo) cachet on cover | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL | (Astro Covers) cachet (different) on cover | OSO-4 launch |
| United States | 1967-10-18 | Kennedy Space Center FL | (Centennial black Orbiting Observatories and black text) cachet on cover | OSO-4 launch (OAO-2, OSO-1/6 type, and OGO-1/6 type depicted) |
| United States | 1967-10-18 | Cape Canaveral FL | (Centennial black Orbiting Observatories and black text) cachet on cover | OSO-4 launch (OAO-2, OSO-1/6 type, and OGO-1/6 type depicted) |
| United States | 1967-10-18 | Cape Canaveral FL | (Sarzin?) cachet on cover | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL | (HJM black and black typed) cachet on cover | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL | (C. Swanson/DuBeau? magenta rubber-stamp) cachet on cover | OSO-4 launch |
| United States | 1967-10-18 | Cape Canaveral FL | (C. Swanson/DuBeau? magenta rubber-stamp and blue typed) cachet on cover | OSO-4 launch |
| United States | 1967-10-18 | Kennedy Space Center FL | (Red and black typed and hand-written) cachet on cover | OSO-4 launch |
| 1969-01-22: OSO-5 | ||||
| United States | 1969-01-22 | Patrick AFB, FL (hand cancel) | (SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2 | OSO-5 launch |
| United States | 1969-01-22 | Patrick AFB, FL (machine cancel) | (SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2 | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL (hand cancel) | (SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2 | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL (machine cancel) | (SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2 | OSO-5 launch |
| United States | 1969-01-22 | Kennedy Space Center FL | (SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2 | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL | (Centennial) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Kennedy Space Center FL | (Centennial-like red rocket, type-2 and black typed) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL (machine cancel) | (Orbit Covers) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL (hand cancel) | (Orbit Covers) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Satellite Beach FL | (Whitney blue and red) cachet (and signature) on cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL | (Whitney blue and red) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL (machine cancel) | (Swanson/DuBeau? black rubber-stamp) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL (hand cancel) | (Swanson/DuBeau? black rubber-stamp) cachet on (airmail) cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL | (HJM black and red typed) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL | (Sarzin) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Cape Canaveral FL | (Red printed and blue rubber-stamp) cachet on cover | OSO-5 launch |
| United States | 1969-01-22 | Kennedy Space Center FL | (Blue printed, based on a Sokalsky design) cachet on cover | OSO-5 launch |
| 1969-08-09: OSO-6 (and PAC-1) | ||||
| United States | 1969-08-09 | Cape Canaveral FL (machine cancel) | (Orbit Covers) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL (hand cancel) | (Orbit Covers) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Patrick AFB, FL (hand cancel) | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-6 launch |
| United States | 1969-08-09 | Patrick AFB, FL (machine cancel) | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL | (SpaceCraft/Swanson) cachet on cover, also insert | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL (machine cancel) | (Whitney cyan and purple) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL (hand cancel) | (Whitney cyan and purple) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Patrick AFB, FL | (Whitney cyan and purple) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Kennedy Space Center FL | (Jarrett? black rubber-stamp) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Kennedy Space Center FL | (Jarrett? black rubber-stamp) cachet (slightly different, and signature) on cover | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL | (Centennial) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL | (Centennial-like orange earth) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL | (Swanson/DuBeau? magenta rubber-stamp) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL | (Swanson/DuBeau? blue and purple and black rubber-stamp) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL | (Black printed and magenta rubber-stamp) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Kennedy Space Center FL | (Red printed) cachet on cover | OSO-6 launch |
| United States | 1969-08-09 | Cape Canaveral FL | (Sarzin) cachet on cover | OSO-6 launch |
| 1971-09-29: OSO-7 (and TETR-4) | ||||
| United States | 1971-09-29 | Kennedy Space Center FL | (Blue and black printed) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Kennedy Space Center FL | (Space Voyage) cachet on cover, also insert | OSO-7 launch (also Tetr-4 (Tetr-D); not "Tetr-3 (Tetr-D)", as in text) |
| United States | 1971-09-29 | Cape Canaveral FL (machine cancel) | (Space Voyage blue and orange) cachet on cover, also insert | OSO-7 launch (also Tetr-4 (Tetr-D); not "Tetr-3 (Tetr-D)", as in text) |
| United States | 1971-09-29 | Cape Canaveral FL (hand cancel) | (Space Voyage blue and red) cachet on cover, also insert | OSO-7 launch (also Tetr-4 (Tetr-D); not "Tetr-3 (Tetr-D)", as in text) |
| United States | 1971-09-29 | Kennedy Space Center FL | (Centennial brown image and black text) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Cape Canaveral FL | (Centennial brown image and black text) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Cape Canaveral FL | (Centennial black image and black text) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Cape Canaveral FL | (Centennial blue) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Kennedy Space Center FL | (Centennial blue) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Titusville FL | (Goldcraft) cachet on cover | OSO-7 launch; also IQSY |
| United States | 1971-09-29 | Cape Canaveral FL | (Orbit Covers) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Cape Canaveral FL | (Riser/Andromeda/Cygnus Cover no.7) cachet on (airmail) cover (incorrectly identified as "OSO-8"), also insert1 and insert2 | OSO-7 launch |
| United States | 1971-09-29 | Kennedy Space Center FL | (Solar Covers no.28) cachet on cover, also insert | OSO-7 launch |
| United States | 1971-09-29 | Cape Canaveral FL | (Solar Covers no.28) cachet on cover, also insert | OSO-7 launch |
| United States | 1971-09-29 | Patrick AFB, FL | (Solar Covers no.28) cachet on cover, also insert | OSO-7 launch |
| United States | 1971-09-29 | Cape Canaveral FL | (Whitney blue) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Cape Canaveral FL | (Sarzin) cachet on cover | OSO-7 launch (but OSO-1/6 type depicted) |
| United States | 1971-09-29 | Cape Canaveral FL | (Swanson blue and red rubber-stamp) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Cape Canaveral FL | (Swanson black and red and blue rubber-stamp) cachet on cover | OSO-7 launch |
| United States | 1971-09-29 | Cape Canaveral FL | (Swanson black and red and blue rubber-stamp) cachet on (airmail) cover | OSO-7 launch |
| United States | 1971-09-29 | Kennedy Space Center FL | (Red and black rubber-stamp) cachet on cover | OSO-7 launch |
| 1975-06-21: OSO-8 | ||||
| United States | 1975-06-21 | Satellite Beach FL (hand cancel) | (Whitney black and blue) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Satellite Beach FL (machine cancel) | (Whitney black and blue) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL (machine cancel) | (Whitney black and blue) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL (hand cancel) | (Whitney black and blue) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL (hand cancel) | (Whitney black and blue) cachet on (airmail) cover | OSO-8 launch |
| United States | 1975-06-21 | Patrick AFB, FL (hand cancel) | (Whitney black and blue) cachet on cover, also back | OSO-8 launch |
| United States | 1975-06-21 | Patrick AFB, FL (machine cancel) | (Whitney black and blue) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (Space Voyage) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (Orbit Covers) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (Blue rubber-stamp) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (SCPS) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (Centennial) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (Blue and red rubber-stamp) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (Centennial-like) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (Centennial yellow earth) cachet on cover | OSO-8 launch (but Relay, Vanguard-2, Pioneer-3/4 type, Explorer-1, TIROS/ESSA type depicted) |
| United States | 1975-06-21 | Greenbelt MD | (GSFC Stamp Club) cachet on cover | OSO-8 launch |
| United States | 1975-06-21 | Cape Canaveral FL | (Black printed) cachet on cover | OSO-8 launch |
| United States | 1975-06-23 | Kennedy Space Center FL | (Space Voyage) cachet on cover | OSO-8 launch |
| OSO (on other than OSO launch covers) | ||||
| There exist a large number of Centennial Covers with generic cachets with multiple satellites depicted, including OSO-1/6 type. Details about these cachets, as well as images of the covers, are found in the Centennial Covers page. | ||||
| United States | 1967-06-14 | Kennedy Space Center FL | (Red and black typed) cachet on Mariner-5 launch cover | "Mariner-5" (and launch date) |
| United States | 1968-03-04 | Cape Canaveral FL (machine cancel) | (SpaceCraft/Swanson) insert or insert variation (slightly different text arrangement) from OGO-5 launch cover, also front | "OSO" (and "OAO (Future)"2) |
| United States | 1968-03-04 | Cape Canaveral FL (hand cancel) | (SpaceCraft/Swanson) insert or insert variation (slightly different text arrangement) from OGO-5 launch cover, also front | |
| United States | 1968-03-04 | Patrick AFB, FL (hand cancel) | (SpaceCraft/Swanson) insert or insert variation (slightly different text arrangement) from OGO-5 launch cover, also front | |
| United States | 1968-03-04 | Patrick AFB, FL (machine cancel) | (SpaceCraft/Swanson) insert or insert variation (slightly different text arrangement) from OGO-5 launch cover, also front | |
| Australia | 1972-12-07 | Tharwa ACT | (Orroral Valley Tracking Station black printed) cachet on Apollo-17 launch cover | OSO-1/6 type (top left of cachet) |
| Australia | 1975-07-15 | Torrens ACT | (Orroral Valley Tracking Station purple rubber-stamp) cachet on Apollo-ASTP launch and Soyuz-19 ASTP launch cover | OSO-1/6 type (top left of cachet) |
| United States | 1976-03-16 | Auburn MA | (GSFC Stamp Club blue printed) cachet on 50th anniv. first liquid fuel rocket flight/launch cover | "OSO"-1/6 type1 |
| United States | 1978-05-20 | GSFC, MD | (GSFC multi-satellite blue rubber-stamp) cachet (same design as immediately above) on Pioneer-12 launch cover | "OSO"-1/6 type1 |
| United States | 1978-10-24 | GSFC, MD | (GSFC multi-satellite blue rubber-stamp) cachet (same) on Nimbus-7 and CAMEO launch cover | "OSO"-1/6 type1 |
| United States | 1983-01-25 | Greenbelt MD | (GSFC multi-satellite blue rubber-stamp) cachet (same) on IRAS and PIX-2 launch cover | "OSO"-1/6 type1 |
1OSO-1 — OSO-6 are all basically identical.
2"OAO (Future)" was likely meant to read "OSO (Future)" to match the design of AOSO.
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