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X-series
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| X-2 / Orba | X-3 / Prospero | X-4 / Miranda |
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X-series
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|---|---|---|---|
| X-2 / Orba | X-3 / Prospero | X-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.).
| Country | Catalog Number | Type of Item | Year of Issue | Notes on Content |
|---|---|---|---|---|
| X-series (UK) | ||||
| X-2 / Orba | ||||
| No (non-launch cover) postal items found | ||||
| X-3 / Prospero | ||||
| Djibouti | Unknown 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) | 2013 | X-3 / "Prospero" |
| Djibouti | Unknown fdc1 | MS2 on FDC | ||
| Djibouti | Unknown fdc2 | MS2 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).
| Country | Cancel Date | Cancel Location | Type of Item | Notes on Content |
|---|---|---|---|---|
| X-series (UK) | ||||
| 1970-09-02: X-2 / Orba | ||||
| Australia | 1970-09-02 | Woomera SA | (Printed) cachet on cover | X-2 / Orba launch |
| Australia | 1970-09-02 | Woomera SA | (Printed) cachet (different) on cover | X-2 / Orba launch |
| 1971-10-28: X-3 / Prospero | ||||
| Australia | 1971-10-28 | Woomera SA | (Space Voyage) cachet on cover | X-3 / Prospero launch |
| Australia | 1971-10-28 | Woomera SA | (Printed) cachet on cover | X-3 / Prospero launch |
| Australia | 1971-10-28 | Woomera SA | (Tracking-related red printed) cachet on cover | X-3 / Prospero launch |
| Australia | 1971-10-28 | Woomera SA | (Tracking-related purple rubber-stamp) cachet on cover | X-3 / Prospero launch |
| Australia | 1971-10-28 | Woomera SA | (Black rubber-stamp) cachet on cover, also back flap | X-3 / Prospero launch |
| Australia | 1971-10-28 | Woomera SA | (Black rubber-stamp) cachet on (airmail) cover | X-3 / Prospero launch |
| 1974-03-08: X-4 / Miranda | ||||
| United States | 1974-03-08 | Vandenberg AFB, CA | (Interspace Cover) cachet on cover | X-4 / Miranda launch |
| United States | 1974-03-08 | Vandenberg AFB, CA | (Space Voyage) cachet on cover | X-4 / Miranda launch |
| United States | 1974-03-08 | Vandenberg AFB, CA | (Centennial) cachet on cover | X-4 / Miranda launch |
| United States | 1974-03-08 | Vandenberg AFB, CA | (Orbit Covers) cachet on cover | X-4 / Miranda launch (but Ariel-3/4 type depicted) |
| United States | 1974-03-08 | Vandenberg AFB, CA | (Swanson/DuBeau? blue rubber-stamp) cachets on cover | X-4 / Miranda launch |
| United States | 1974-03-08 | Vandenberg AFB, CA | (Swanson/DuBeau? blue and black rubber-stamp) cachets on cover | X-4 / Miranda launch |
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