Mars Observer

Mars Observer
satellite

Mars Observer patch
satellitepatch

This page contains philatelic information on the Mars Observer satellite. 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.

The use of the MO acronym/initialism is not recommended, to avoid confusing Mar Observer with Mars Odyssey.

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)
Mars Observer Mars Observer Mars Observer


Below is a list of Mars Observer satellite postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).

CountryCatalog NumberType of ItemYear of IssueNotes on Content
Mars Observer
Comoro Islands784 (Mi990)
i784

Imperforate
1992"Mars Observer", but solar panels have a different design (on stamp), also solar panels folded (in upper margin)
Comoro Islands784b (BL367)
i784b
On stamp and in (upper) margin of SS1 (784)
On stamp and in (upper) margin of imperforate SS1 (i784)
Comoro Islands787a (Mi990+992-993)On one of MS3 (784+786-787)
Congo (Republic)922 (Mi1277A)
i922 (Mi1277B)
One of MS3 (924b (922-924)) (Mi1277A-1279A)
One of imperforate MS3 (i924b (i922-i924)) (Mi1277B-1279B)
1991"Mars Observer"
Congo (Republic)922a (BL73)SS1 (922)
Ivory CoastUnknown a (Mi?)One of MS4 (a-d)2012"Mars Observer"
Malagasy Republic1536f (Mi2478)
i1536f
One of MS6 (1536 (a-f)) (Mi2473-2478)
One of imperforate MS6 (i1536 (a-f))
2000Mars "Observer"
Malagasy Republic1536 fdcMS6 on FDC
Nevis1214 (BL186A)
i1214 (BL186B)
On stamp of SS1
On stamp of imperforate SS1
2000"Mars Observer"
RomaniaNoneCancel2005"Mars Observer"
St. Vincent Grenadines961 (BL120)SS11992"Mars Observer"
United StatesNoneCachet on cover1992"Mars Observer"
United StatesNone(Mission patch) cachet on cover1993"Mars Observer" patch
United StatesNone(Parforex Station) cancel on cover1993"Mars Observer"
United StatesNone(Parforex Station) cancel on cover (ATA Space Unit cachet)1993"Mars Observer"


Below is a list of Mars Observer satellite launch covers (including anniversary-of-launch covers, and launch-related event covers).

CountryCancel DateCancel LocationType of ItemNotes on Content
1992-09-25: Mars Observer
United States1992-09-25Kennedy Space Center FL(NASA mission patch) cachet on coverMars Observer launch
Australia1992-09-28Canberra ACT(Space Voyage) cachet on coverMars Observer launch
Australia1992-09-28Parkes NSW(CSIRO) cachet on coverMars Observer launch


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Updated: 2017-12-02