OSO-1

Orbiting Solar Observatory
(OSO) series satellites

OSO-7
OSO-1OSO-7

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)


Below is a list of OSO-series satellite 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 and Barbuda 702 overprinted1983OSO-8
Central African Republic1175b (Mi1884A)
i1175b (Mi1884B)
One of MS4 (1175 (a-d)) (Mi1883A-1886A)
One of imperforate MS4 (i1175 (a-d)) (Mi1883B-1886B)
1997"OSO-1"
Gambia2269d (Mi3707)
i2269d
One of MS6 (2269 (a-f)) (Mi3704-3709)
One of imperforate MS6 (i22693 (a-f))
2000OSO-1/6 type1
Gambia2269d essayOne of MS6 (2269 imperforate essay (a-f))
Gambiai2269 fdc3MS6 on FDC
Guinea RepublicMi4252B_ms4 fdcCachet on FDC2006OSO-1/6 type1
Micronesia344b (Mi722)One of MS20 (344 (a-t)) (Mi721-740)1999"OSO-1"
Panama457B (Mi780)
i457B

Imperforate
1964"OSO-1"
Paraguay922 (Mi1522)
i922 (Mi1530)

Imperforate with changed colors
1966OSO-1/6 type1
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
Paraguay926a fdc
i926a fdc
SS1 and cachet on FDC
Imperforate SS1 and cachet on FDC
Satellite Beach FL (USA)Localset-C03 (blue)1964"OSO"-1/6 type1
Satellite Beach FL (USA)Local o/pset-C03 (blue) overprinted in gold1965"OSO"-1/6 type1
Sharjah48 (Mi60A)
i48 (Mi60B)

Imperforate
1964OSO-1/6 type1
Sharjah48A (Mi unlisted)
i48A
48 overprinted new currency
i48 overprinted new currency
1967OSO-1/6 type1
SpainNone(Printed) cachet on cover1984"OSO" (in text only)
Tanzania1323 (Mi2021)1994OSO-8
Togo501 (Mi447A)
i501 (Mi447B)

Imperforate
1964OSO-1/6 type1
Togo503 (Mi449A)
i503 (Mi449B)

Imperforate
Togo500-501+503 fdcTwo of three stamps on FDC
Togo500-505 fdcTwo of six stamps on FDC
Togo501-502+505 fdcOne of three stamps on FDC
Togo505a (BL17)Imperforate MS4 (502-505)
Togo505a fdcImperforate MS4 on FDC
Umm Al QiwainMi78A
Mi78B

Imperforate
1966AOSO2
Umm Al QiwainMi78A-82A+BL5B fdcOne of five stamps on FDC
Umm Al QiwainMi89A
Mi89B
Mi78A overprinted new currency
Mi78B overprinted new currency
1967AOSO2
United Nations112-113 fdc (Mi122-123 fdc)(Orbit Covers) cachet on FDC1962OSO-1/6 type1
United StatesNone(Astro Covers) cachet on cover1962"OSO" (in text)
United StatesNone(GSFC blue rubber-stamp) cachet on cover1974OSO-7
United StatesNone(Printed) cachet on cover1977OSO-8
United States1915 fdc (Mi1484 fdc)(PCS golden-replica) insert from FDC, also front1981"Orbiting Solar Observatory" (in text)
Yemen Arab RepublicC90 (Mi1701)1982OSO-1/6 type1
Yemen Arab RepublicC90 dsDeluxe sheet (C90)
Yemen Arab RepublicC90 proofChromalin proof

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).

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 cover, also insertOSO-1 launch
United States1962-03-07Patrick AFB, FL(SpaceCraft/Swanson) cachet (and signature) on cover, also insertOSO-1 launch
United States1962-03-07Port Canaveral FL(Goldcraft) cachet on coverOSO-1 launch
United States1962-03-07Port Canaveral FL(Gordon?) cachet on coverOSO-1 launch (wrong depiction)
United States1962-03-07Port Canaveral FL(Sarzin) cachet on coverOSO-1 launch
United States1962-03-07Patrick AFB, FL(C. Swanson purple rubber-stamp) cachet on coverOSO-1 launch
United States1962-03-07Patrick AFB, FL(C. Swanson green and purple rubber-stamp) cachet on (airmail) coverOSO-1 launch
1965-02-03: OSO-2
United States1965-02-03Patrick AFB, FL(SpaceCraft/Swanson) cachet on cover, also insertOSO-2 launch
United States1965-02-03Patrick AFB, FL(SpaceCraft/Swanson) cachet (and signature) on cover, also insertOSO-2 launch
United States1965-02-03Cape Canaveral FL(SpaceCraft/Swanson) cachet on cover, also insertOSO-2 launch
United States1965-02-03Cape Canaveral FL(C. Swanson 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 type depicted)
United States1965-02-03Cape Canaveral FL(Astro Covers) cachet on coverOSO-2 launch
United States1965-02-03Cape Canaveral FL(Centennial) cachet on coverOSO-2 launch
1965-08-25: OSO-C [failed]
United States1965-08-25Cape Canaveral FL(SpaceCraft/Swanson) cachet on cover, also insertOSO-C launch [failed]
United States1965-08-25Cape Canaveral FL(SpaceCraft/Swanson) cachet (and signature) on cover, also insertOSO-C launch [failed]
United States1965-08-25Patrick AFB, FL(SpaceCraft/Swanson) cachet on cover, also insertOSO-C launch [failed]
United States1965-08-25Patrick AFB, FL(SpaceCraft/Swanson) cachet (and signature) on cover, also insertOSO-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(Swanson blue and black rubber-stamp and typed) cachet on coverOSO-C launch [failed] (not OSO-3)
1967-03-08: OSO-3
United States1967-03-08Patrick AFB, FL(SpaceCraft/Swanson) cachet on cover, also insertOSO-3 launch
United States1967-03-08Cape Canaveral FL(SpaceCraft/Swanson) cachet on cover, also insertOSO-3 launch
United States1967-03-08Cape Canaveral FL (hand cancel)(Orbit Covers) cachet on coverOSO-3 launch
United States1967-03-08Cape Canaveral FL (machine cancel)(Orbit Covers) cachet on coverOSO-3 launch
United States1967-03-08Cape Canaveral FL(Sarzin) cachet on coverOSO-3 launch
United States1967-03-08Kennedy Space Center FL(Swanson red and black rubber-stamp) cachet on coverOSO-3 launch
United States1967-03-08Cape Canaveral FL(Centennial) cachet on coverOSO-3 launch
United States1967-03-08Cape Canaveral FL(Swanson purple rubber-stamp) cachet on coverOSO-3 launch
United States1967-03-08Cape Canaveral FL(HJM black) cachet on coverOSO-3 launch
1967-10-18: OSO-4
United States1967-10-18Cape Canaveral FL (hand cancel)(SpaceCraft/Swanson) cachet on cover, also insertOSO-4 launch
United States1967-10-18Cape Canaveral FL (machine cancel)(SpaceCraft/Swanson) cachet on cover, also insertOSO-4 launch
United States1967-10-18Patrick AFB, FL (hand cancel)(SpaceCraft/Swanson) cachet on cover, also insertOSO-4 launch
United States1967-10-18Patrick AFB, FL (machine cancel)(SpaceCraft/Swanson) cachet on cover, also insertOSO-4 launch
United States1967-10-18Cape Canaveral FL (hand cancel)(Orbit Covers) cachet on coverOSO-4 launch
United States1967-10-18Cape Canaveral FL (machine cancel)(Orbit Covers) cachet (same) on coverOSO-4 launch
United States1967-10-18Cape Canaveral FL(Astro Covers) cachet on coverOSO-4 launch
United States1967-10-18Cape Canaveral FL(Astro Covers, no logo) cachet (different text font) on coverOSO-4 launch
United States1967-10-18Kennedy Space Center FL(Astro Covers, no logo) cachet on coverOSO-4 launch
United States1967-10-18Cape Canaveral FL(Astro Covers) cachet (different) on coverOSO-4 launch
United States1967-10-18Kennedy Space Center FL(Centennial black Orbiting Observatories and black text) cachet on coverOSO-4 launch (OAO-2, OSO-1/6 type, and OGO-1/6 type depicted)
United States1967-10-18Cape Canaveral FL(Centennial black Orbiting Observatories and black text) cachet on coverOSO-4 launch (OAO-2, OSO-1/6 type, and OGO-1/6 type depicted)
United States1967-10-18Cape Canaveral FL(Sarzin?) cachet on coverOSO-4 launch
United States1967-10-18Cape Canaveral FL(HJM black) cachet on coverOSO-4 launch
1969-01-22: OSO-5
United States1969-01-22Patrick AFB, FL (hand cancel)(SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2OSO-5 launch
United States1969-01-22Patrick AFB, FL (machine cancel)(SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2OSO-5 launch
United States1969-01-22Cape Canaveral FL (hand cancel)(SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2OSO-5 launch
United States1969-01-22Cape Canaveral FL (machine cancel)(SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2OSO-5 launch
United States1969-01-22Kennedy Space Center FL(SpaceCraft/Swanson) cachet on cover, also insert1 or insert1 variation (slightly different line lengths) and insert2OSO-5 launch
United States1969-01-22Cape Canaveral FL(Centennial) cachet on coverOSO-5 launch
United States1969-01-22Kennedy Space Center FL(Centennial red rocket, type-2 and black typed) cachet on coverOSO-5 launch
United States1969-01-22Cape Canaveral FL (machine cancel)(Orbit Covers) cachet on coverOSO-5 launch
United States1969-01-22Cape Canaveral FL (hand cancel)(Orbit Covers) cachet on coverOSO-5 launch
United States1969-01-22Satellite Beach FL(Whitney blue and red) cachet (and signature) on coverOSO-5 launch
United States1969-01-22Cape Canaveral FL (machine cancel)(Swanson black rubber-stamp) cachet on coverOSO-5 launch
United States1969-01-22Cape Canaveral FL (hand cancel)(Swanson black rubber-stamp) cachet on (airmail) coverOSO-5 launch
United States1969-01-22Cape Canaveral FL(HJM black) cachet on coverOSO-5 launch
1969-08-09: OSO-6 (and PAC-1)
United States1969-08-09Cape Canaveral FL (machine cancel)(Orbit Covers) cachet on coverOSO-6 launch
United States1969-08-09Cape Canaveral FL (hand cancel)(Orbit Covers) cachet on coverOSO-6 launch
United States1969-08-09Patrick AFB, FL (hand cancel)(SpaceCraft/Swanson) cachet on cover, also insertOSO-6 launch
United States1969-08-09Patrick AFB, FL (machine cancel)(SpaceCraft/Swanson) cachet on cover, also insertOSO-6 launch
United States1969-08-09Cape Canaveral FL(SpaceCraft/Swanson) cachet on cover, also insertOSO-6 launch
United States1969-08-09Cape Canaveral FL(Whitney cyan and black) cachet on coverOSO-6 launch
United States1969-08-09Kennedy Space Center FL(Black rubber-stamp) cachet on coverOSO-6 launch (Apollo depicted)
United States1969-08-09Cape Canaveral FL(Centennial) cachet on coverOSO-6 launch
United States1969-08-09Kennedy Space Center FL(SpaceCraft/Swanson) cachet on coverOSO-6 launch (by cancel only, cachet is for Mariner-7 South Pole flyby)
1971-09-29: OSO-7 (and TETR-4)
United States1971-09-29Kennedy Space Center FL(Printed) cachet on coverOSO-7 launch
United States1971-09-29Kennedy Space Center FL(Space Voyage) cachet on coverOSO-7 launch (also Tetr-4 (Tetr-D), not "Tetr-3 (Tetr-D)" as in text)
United States1971-09-29Cape Canaveral FL (machine cancel)(Space Voyage) cachet on coverOSO-7 launch (also Tetr-4 (Tetr-D), not "Tetr-3 (Tetr-D)" as in text)
United States1971-09-29Cape Canaveral FL (hand cancel)(Space Voyage) cachet on coverOSO-7 launch (also Tetr-4 (Tetr-D), not "Tetr-3 (Tetr-D)" as in text)
United States1971-09-29Kennedy Space Center FL(Centennial brown image and black text) cachet on coverOSO-7 launch
United States1971-09-29Cape Canaveral FL(Centennial brown image and black text) cachet on coverOSO-7 launch
United States1971-09-29Cape Canaveral FL(Centennial black image and black text) cachet on coverOSO-7 launch
United States1971-09-29Titusville FL(Goldcraft) cachet on coverOSO-7 launch; also IQSY
United States1971-09-29Cape Canaveral FL(Orbit Covers) cachet on coverOSO-7 launch
United States1971-09-29Cape Canaveral FL(Riser/Andromeda/Cygnus no.7) cachet on cover (incorrectly identified as "OSO-8"), also insert1 and insert2 (unclear usage)OSO-7 launch
United States1971-09-29Kennedy Space Center FL(Solar Covers no.28) cachet on cover, also insertOSO-7 launch
United States1971-09-29Cape Canaveral FL(Whitney blue) cachet on coverOSO-7 launch
United States1971-09-29Cape Canaveral FL(Sarzin) cachet on coverOSO-7 launch (but OSO-1/6 type depicted)
United States1971-09-29Cape Canaveral FL(Swanson black and red and blue rubber-stamp) cachet on coverOSO-7 launch
United States1971-09-29Kennedy Space Center FL(Red and black rubber-stamp) cachet on coverOSO-7 launch
United States1971-09-29Cape Canaveral FL(Blue printed) cachet on coverOSO-7 launch
1975-06-21: OSO-8
United States1975-06-21Satellite Beach FL (hand cancel)(Whitney black) cachet on coverOSO-8 launch
United States1975-06-21Satellite Beach FL (machine cancel)(Whitney black and blue) cachet on coverOSO-8 launch
United States1975-06-21Cape Canaveral FL(Space Voyage) cachet on coverOSO-8 launch
United States1975-06-21Cape Canaveral FL(Orbit Covers) cachet on coverOSO-8 launch
United States1975-06-21Cape Canaveral FL(Blue rubber-stamp) cachet on coverOSO-8 launch
United States1975-06-21Cape Canaveral FL(SCPS) cachet on coverOSO-8 launch
United States1975-06-21Cape Canaveral FL(Centennial) cachet on coverOSO-8 launch
United States1975-06-23Kennedy Space Center FL(Space Voyage) cachet on coverOSO-8 launch
OSO (on other than OSO launch covers)
United States1968-03-04Cape Canaveral FL(Centennial yellow Orbiting Observatories and black text) cachet on OGO-5 launch coverOSO-1/6 type1
United States1968-03-04Cape 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 States1968-03-04Cape Canaveral FL (hand cancel)(SpaceCraft/Swanson) insert or insert variation (slightly different text arrangement) from OGO-5 launch cover, also front
United States1968-03-04Patrick AFB, FL (hand cancel)(SpaceCraft/Swanson) insert or insert variation (slightly different text arrangement) from OGO-5 launch cover, also front
United States1968-03-04Patrick AFB, FL (machine cancel)(SpaceCraft/Swanson) insert or insert variation (slightly different text arrangement) from OGO-5 launch cover, also front
United States1968-12-07Cape Canaveral FL(Centennial red Orbiting Observatories and black text) cachet on OAO-2 launch coverOSO-1/6 type1
Australia1972-12-07Tharwa ACTCachet on Apollo-17 launch coverOSO (leftmost of three satellites)
United States1976-03-16Auburn MA(GSFC Stamp Club printed) cachet on 50th anniv. first liquid fuel rocket flight/launch cover"OSO"-1/6 type1
United States1978-05-20GSFC, MD(GSFC blue rubber-stamp) cachet (same design as immediately above) on Pioneer-12 launch cover"OSO"-1/6 type1
United States1978-10-24GSFC, MD(GSFC blue rubber-stamp) cachet (same) on Nimbus-7 and CAMEO launch cover"OSO"-1/6 type1
United States1983-01-25Greenbelt MD(GSFC 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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Updated: 2018-01-15