X-2 / Orba

X-series
satellites

X-3 / Prospero X-4 / Minanda
X-2 / OrbaX-3 / ProsperoX-4 / Miranda

This page contains philatelic information on the UK X-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.

It is not clear what was X-1 in this series. If anyone knows, 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)
X-series (UK) X-series (UK) X-series (UK)


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

CountryCatalog NumberType of ItemYear of IssueNotes on Content
X-series (UK)
X-2 / Orba
No (non-launch cover) postal items found
X-3 / Prospero
DjiboutiUnknown a (Mi?)
Unknown ia
On one stamp and in (upper-middle) margin of MS2 (a-b)
On one stamp and in (upper-middle) margin of imperforate MS2 (a-b)
2013X-3 / "Prospero"
DjiboutiUnknown fdc1MS2 on FDC
DjiboutiUnknown fdc2MS2 and cachet on FDC
X-4 / Miranda
No (non-launch cover) postal items found


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

CountryCancel DateCancel LocationType of ItemNotes on Content
X-series (UK)
1970-09-02: X-2 / Orba
Australia1970-09-02Woomera SA(Printed) cachet on coverX-2 / Orba launch
Australia1970-09-02Woomera SA(Printed) cachet (different) on coverX-2 / Orba launch
1971-10-28: X-3 / Prospero
Australia1971-10-28Woomera SA(Space Voyage) cachet on coverX-3 / Prospero launch
Australia1971-10-28Woomera SA(Printed) cachet on coverX-3 / Prospero launch
Australia1971-10-28Woomera SA(Tracking-related red printed) cachet on coverX-3 / Prospero launch
Australia1971-10-28Woomera SA(Tracking-related purple rubber-stamp) cachet on coverX-3 / Prospero launch
Australia1971-10-28Woomera SA(Black rubber-stamp) cachet on cover, also back flapX-3 / Prospero launch
Australia1971-10-28Woomera SA(Black rubber-stamp) cachet on (airmail) coverX-3 / Prospero launch
1974-03-08: X-4 / Miranda
United States1974-03-08Vandenberg AFB, CA(InterSpace Covers) cachet on coverX-4 / Miranda launch
United States1974-03-08Vandenberg AFB, CA(Space Voyage) cachet on coverX-4 / Miranda launch
United States1974-03-08Vandenberg AFB, CA(Centennial) cachet on coverX-4 / Miranda launch
United States1974-03-08Vandenberg AFB, CA(Orbit Covers) cachet on coverX-4 / Miranda launch (Ariel-3/4 type depicted)
United States1974-03-08Vandenberg AFB, CA(Swanson-DuBeau? blue and black rubber-stamp) cachets on coverX-4 / Miranda launch


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Updated: 2018-06-04