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Gravity Probe (GP)
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| GP-B | GP-B (patch) |
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Gravity Probe (GP)
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| GP-B | GP-B (patch) |
This page contains philatelic information on the Gravity Probe (GP) 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) |
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) |
|---|---|---|
| Gravity Probe (GP) | Gravity Probe (GP) | Gravity Probe (GP) |
Below is a list of Gravity Probe (GP) series satellite postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).
| Country | Catalog Number | Type of Item | Year of Issue | Notes on Content |
|---|---|---|---|---|
| Gravity Probe (GP) | ||||
| Algeria | 1669 fdc (Mi1805 fdc) | (Algeria Post) cachet on FDC | 2015 | (three) GP-B (but "GPS" in text) |
| Comoro Islands | 793 (Mi999A) i793 (Mi999B) | More perforations than MS6 or SS1 | 1992 | (Gravity) "Probe-B" (GP-B) |
| Comoro Islands | 793_from_ms6 (Mi999A) i793_from_ms6 (Mi999B) | One of MS6 (795a (790-795)) (Mi996A-1001A) One of imperforate MS6 (i795a (i790-i795)) | ||
| Comoro Islands | 793b (BL376A) i793b (BL376B) | On stamp of SS1 (793) On stamp of imperforate SS1 (i793) | ||
| Comoro Islands | Unlisted (Mi unlisted) Unlisted imperf | One of MS4 (a-d) One of imperforate MS4 (a-d) | 1999 | "Gravity Probe-B" (GP-B) |
| Comoro Islands | Unlisted ss (BL unlisted) Unlisted iss1 | On stamp of SS1 On stamp of imperforate SS1 | ||
| Franklin Mint (USA) | None | (Bronze) medallion, also reverse | 1970s | "Gravity Probe-A" |
| Guinea Republic | Mi5873A-5878A_ms6 Mi5873B-5878B_ms6 | MS6 (Mi5873A-5878A) Imperforate MS6 (Mi5873B-5878B) | 2008 | "Gravity Probe-B" (GP-B) |
| Guinea Republic | Mi5873A-5878A_ms6 fdc | MS6 on FDC | ||
| Guinea Republic | BL1585A BL1585B | In (left) margin of SS1 In (left) margin of imperforate SS1 | ||
| Guinea Republic | BL1585A misperf | Mis-perforated | ||
| Guinea Republic | BL1585A fdc BL1585B fdc | SS1 and (multi-color printed) cachet on FDC Imperforate SS1 and (multi-color printed) cachet on FDC | ||
| Guinea Republic | BL1963 | On stamp of SS1 | 2011 | "Gravity Probe-B" (GP-B) |
| Guinea Republic | BL1963 fdc | SS1 on FDC | ||
| Guinea-Bissau | Mi6493A Mi6493B | One of MS4 (Mi6492A-6495A) One of imperforate MS4 (Mi6492B-6495B) | 2013 | GP-B |
| Guinea-Bissau | Mi6492A-6495A_ms4 fdc1 | MS4 on FDC | ||
| Guinea-Bissau | Mi6492A-6495A_ms4 fdc2 | MS4 on FDC (different) | ||
| Guinea-Bissau | BL1334 | In (upper) margin of SS1 | 2015 | GP-B |
| Guinea-Bissau | Unknown b (Mi?) | One of MS6 (a-f) | 2023 | GP-B |
| Ivory Coast | Unknown ss (BL none) Unknown iss | On stamp of SS1 [known illegal issue] On stamp of imperforate SS1 | 2012 | GP-B |
| Ivory Coast | Unknown ss fdc Unknown iss fdc | SS1 on FDC Imperforate SS1 on FDC | ||
| Jersey (Great Britain) | 1955-1960 pack | Page2 of Presentation Pack and page2 detail, also front and back and page1 | 2016 | (faint) GP-B |
| Korea (North) | 2912b (Mi3108) | One of MS4 (2912 (a-d)) (BL255) | 1990 | like GP-B (but much earlier unknown) |
| Maldive Islands | 3304 (Mi5564-5567) i3304 | MS4 (3304 (a-d)) Imperforate MS4 (i3304 (a-d)) | 2015 | "Gravity Probe-B" (GP-B) |
| Maldive Islands | 3304 fdc | MS4 and (multi-color printed) cachet on FDC | ||
| Maldive Islands | 3313 (BL775) i3313 | SS1 Imperforate SS1 | ||
| Maldive Islands | 3313 fdc | SS1 on FDC | ||
| Romania | None | (Pictorial) cancel | 2005 | (Gravity) "Probe B" (GP-B) |
| Romania | None | (Pictorial) cancel | 2005 | (Gravity) "Probe-A" (GP-A) |
| United States United States | 1774 fdc None (Mi? fdc) | (First Rank) cachet on FDC Cancel (Einstein birthdate) on cover | 1979 | "Einstein relativity Gravity Probe" (GP-A) "Born-March 14, 1879" |
Below is a list of Gravity Probe (GP) 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 |
|---|---|---|---|---|
| Gravity Probe (GP) | ||||
| 1976-06-18: GP-A [sub-orbital] | ||||
| United States | 1976-06-18 | Cape Canaveral FL | (Space Voyage purple and pink) cachet on cover | GP-A (sub-orbital) rocket launch |
| United States | 1976-06-18 | Wallops Island VA | (Space Voyage brown and pink) cachet on cover | GP-A (sub-orbital) rocket launch |
| United States | 1976-06-18 | Wallops Island VA | (Swanson green and magenta rubber-stamp) cachet on cover | GP-A (sub-orbital) rocket launch |
| United States | 1976-06-18 | Greenbelt MD | (GSFC STDN blue rubber-stamp) cachet on cover | GP-A (sub-orbital) rocket launch |
| 2004-04-20: GP-B | ||||
| United States | 2004-04-20 | Vandenberg AFB, Lompoc CA | (Lollini) cachet on cover | GP-B launch |
| United States | 2004-04-20 | Vandenberg AFB, Lompoc CA | (Multi-color printed) cachet on cover | GP-B launch |
| United States | 2004-04-20 | Vandenberg AFB, Lompoc CA | (Multi-color printed) cachet (different) on cover | GP-B launch |
| United States | 2004-04-20 | Vandenberg AFB, Lompoc CA | (Multi-color printed) cachet (different) on cover | GP-B launch |
| United States | 2004-04-20 | Vandenberg AFB, Lompoc CA | (B&D) cachet on cover | GP-B launch |
| United States | 2004-04-20 | Vandenberg AFB, Lompoc CA | (SCP sticker) cachet on cover | GP-B launch |
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