Mars Climate Orbiter
This page contains philatelic information on the Mars Climate Orbiter (MCO) 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.
(including anniversary-of-launch covers, and launch-related event covers)
|Other postal items
(stamps, souvenir sheets, aerogrammes, postal cards, etc.)
Below is a list of Mars Climate Orbiter satellite postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).
|Country||Catalog Number||Type of Item||Year of Issue||Notes on Content|
|Mars Climate Orbiter (MCO)|
|Comoro Islands||Unknown d (Mi?)||One of MS6 (a-f)||2008||"Mars Climate" Orbiter|
|Ivory Coast||Unknown a (Mi?)||One of MS4 (a-d)||2012||"Mars Climate Orbiter"|
|Nevis||1215 (BL187)||SS1||2000||"Mars Climate Orbiter"|
|One of MS9 (1076 (a-i)) (Mi1908-1916)|
One of imperforate MS9 (i1076 (a-i))
|Palau||501b (Mi1457)||One of MS6 (501 (a-f)) (Mi1456-1461)||1999||"Mars Climate Orbiter" (but Mars Odyssey depicted)1|
|Palau||503 (BL84)||SS1||"Mars Climate Orbiter"|
|St. Kitts||Unknown d (Mi?)||One of MS4 (a-d)||2014||"Mars Climate" Orbiter|
1Mars Climate Orbiter appears quite similar to Mars Odyssey but without an instrumented boom attached to the spacecraft body.
Below is a list of Mars Climate Orbiter (MCO) satellite launch covers (including anniversary-of-launch covers, and launch-related event covers).
|Country||Cancel Date||Cancel Location||Type of Item||Notes on Content|
|1998-12-11: Mars Climate Orbiter (MCO)|
|United States||1998-12-11||Kennedy Space Center FL||(FM?) cachet on cover||MCO launch|
|United States||1998-12-11||Pasadena CA||Cancel and (JPL Stamp Club) cachet on cover||MCO launch (but "Mars 98 Climate Observer" and "Mars Surveyor 98" in cachet text), Mars Odyssey image (in cancel)|
|United States||1999-09-23||Pasadena CA||(JPL Stamp Club) cachet on cover||attempted Mars orbit insertion and loss1 (but "Mars 98 Climate Observer" in text)|
1The Mars Climate Orbiter (MCO) was lost as it was occulted by Mars (went behind Mars as viewed from Earth). The root cause of the loss was found to be the use of English units for thruster performance data generated by a ground based computer program. This data was used in the construction of trajectory models for the spacecraft, and the modellers assumed the data was in metric units as per the specifications.
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