OSO

Orbiting Solar Observatory
(OSO) series satellites


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)
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


Below is a list of OSO-series postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).

CountryCatalog NumberType of ItemYear of IssueNotes on Content
Orbiting Solar Observatory (OSO)
Antigua and Barbuda702 (BL70)In (lower-center) margin of SS11983OSO-8
Barbuda577 (BL74)In (lower-center) margin of SS1, Antigua 702 overprinted1983OSO-8
Central African Republic1175b (Mi1884)One of MS4 (1175 (a-d))1997OSO-1
Gambia2269d (Mi3708)One of MS6 (2269 (a-f))2000OSO-1/71
Gambia2269d essayOne of MS6 (2269 imperforate essay (a-f))
Guinea RepublicMi4252B_ms4 fdcCachet on FDC2006OSO-1/71
Micronesia344b (Mi722)One of MS20 (344 (a-t))1999OSO-1
Panama457B (Mi780)1964OSO-1
Paraguay922 (Mi1522)
i922 (Mi1530)

Imperforate with changed colors
1966OSO-1/71
Paraguay919-923 fdcOne of five stamps on FDC
Paraguay926 (Mi1526)
i926 (Mi1534)

Imperforate with changed colors
Paraguay926a (BL79)
i926a (BL80)
On stamp of SS1
On stamp of imperforate SS1, changed colors
Satellite Beach FL (USA)Localset-C03 (blue)1964OSO-1/71
Satellite Beach FL (USA)Local o/pset-C03 (blue) overprinted in gold1965OSO-1/71
Sharjah48 (Mi60)1964OSO-1/71
Sharjah48A (Mi unlisted)48 overprinted new currency1967OSO-1/71
Tanzania1323 (Mi?)1994OSO-8
Togo501 (Mi447)1964OSO-1/71
Togo503 (Mi449)
Togo505a (BL17)Imperforate MS4 (502-505)
Umm Al QiwainMi78A
Mi78B

Imperforate
1966AOSO2
Umm Al QiwainMi89A
Mi89B
Mi78A overprinted new currency
Mi78B overprinted new currency
1967AOSO2
United Nations112-113 fdc (Mi122-123 fdc)(Orbit) cachet on FDC1962OSO-1/71
United StatesNone(Centennial?) cachet on OAO-2 launch cover1968OSO-1/71
United StatesNone(Centennial?) cachet on OGO-5 launch cover1968OSO-1/71
United StatesNone(GSFC printed) cachet on 50th anniv. first liquid fuel rocket flight/launch cover (same cachet design as immediately below)1976OSO-1/71
United StatesNone(GSFC rubber-stamp) cachet on Pioneer-12 launch cover (same cachet design as immediately above)1978OSO-1/71
United StatesNone(GSFC rubber-stamp) cachet on Nimbus-7 and CAMEO launch cover (same cachet design as immediately above)1978OSO-1/71
Yemen Arab RepublicC90 (Mi1701)1982OSO-1/71
Yemen Arab RepublicC90 dsDeluxe sheet (C90)
Yemen Arab RepublicC90 proofChromalin proof

1OSO-1 — OSO-7 are all basically identical.
2The AOSO (Advanced OSO) program was canceled.


Below is a list of OSO-series launch covers (including anniversary-of-launch covers, and launch-related event covers).

CountryCancel DateCancel LocationType of ItemNotes on Content
Orbiting Solar Observatory (OSO)
1962-03-07: OSO-1
United States1962-03-07Patrick AFB, FL(SpaceCraft/Swanson) cachet on coverOSO-1 launch
United States1962-03-07Port Canaveral FL(Goldcraft) cachet on cover, also insertOSO-1 launch
United States1962-03-07Port Canaveral FL(Gordon?) cachet on coverOSO-1 launch (wrong image)
United States1962-03-07Port Canaveral FL(?) cachet on coverOSO-1 launch
United States1962-03-07Patrick AFB, FL(Purple rubber-stamp) cachet on coverOSO-1 launch
1965-02-03: OSO-2
United States1965-02-03Patrick AFB, FL(SpaceCraft/Swanson) cachet on coverOSO-2 launch
United States1965-02-03Cape Canaveral FL(SpaceCraft/Swanson) cachet on coverOSO-2 launch
United States1965-02-03Cape Canaveral FL(Purple rubber-stamp) cachet on coverOSO-2 launch
United States1965-02-03Cape Canaveral FL(Sarzin) cachet on coverOSO-2 launch
United States1965-02-03Cape Canaveral FL(Printed) cachet on coverOSO-2 launch (Ariel-1/2 image)
United States1965-02-03Cape Canaveral FL(Astro Covers) cachet on coverOSO-2 launch
1965-08-25: OSO-C [failed]
United States1965-08-25Cape Canaveral FL(SpaceCraft/Swanson) cachet on coverOSO-C launch [failed]
United States1965-08-25Patrick AFB, FL(SpaceCraft/Swanson) cachet on coverOSO-C launch [failed]
United States1965-08-25Cape Canaveral FL(Celestial) cachet on coverOSO-C launch [failed]
United States1965-08-25Cape Canaveral FL(Sarzin) cachet on coverOSO-C launch [failed]; also IQSY
United States1965-08-25Cape Canaveral FL(Two-color rubber-stamp) cachet on coverOSO-C launch [failed] (not OSO-3)
1967-03-08: OSO-3
United States1967-03-08Patrick AFB, FL(SpaceCraft/Swanson) cachet on coverOSO-3 launch
United States1967-03-08Cape Canaveral FL(Orbit) cachet on coverOSO-3 launch
United States1967-03-08Cape Canaveral FL(Sarzin) cachet on coverOSO-3 launch
1967-10-18: OSO-4
United States1967-10-18Cape Canaveral FL (hand cancel)(SpaceCraft/Swanson) cachet on coverOSO-4 launch
United States1967-10-18Cape Canaveral FL (machine cancel)(SpaceCraft/Swanson) cachet on coverOSO-4 launch
United States1967-10-18Cape Canaveral FL(Orbit) cachet on coverOSO-4 launch
1969-01-22: OSO-5
United States1969-01-22Patrick AFB, FL(SpaceCraft/Swanson) cachet on coverOSO-5 launch
United States1969-01-22Cape Canaveral FL(Centennial?) cachet on coverOSO-5 launch
United States1969-01-22Cape Canaveral FL(Orbit) cachet on coverOSO-5 launch
United States1969-01-22Satellite Beach FL(Two-color rubber-stamp) cachet on coverOSO-5 launch
1969-08-09: OSO-6 (and PAC-1)
United States1969-08-09Cape Canaveral FL(Orbit) cachet on coverOSO-6 launch
United States1969-08-09Patrick AFB, FL(SpaceCraft/Swanson) cachet on coverOSO-6 launch
1971-09-29: OSO-7 (and TETR-4)
United States1971-09-29Kennedy Space Center FL(?) cachet on coverOSO-7 launch
United States1971-09-29Kennedy Space Center FL(Space Voyage) cachet on coverOSO-7 launch
United States1971-09-29Kennedy Space Center FL(Centennial?) cachet on coverOSO-7 launch
1975-06-21: OSO-8
United States1975-06-21Satellite Beach FL(Black rubber-stamp) cachet on coverOSO-8 launch
United States1975-06-21Cape Canaveral FL(Space Voyage) cachet on coverOSO-8 launch


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Updated: 2013-06-09