Discoverer

Discoverer-series
satellites


This page contains philatelic information on the Discoverer-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.

The Discoverer-series, also known as Corona satellites, were later declassified as the first KeyHole (KH) reconnaissance satellites.

For your information: Discoverer/Corona/KeyHole Program article and checklist by Charles J. Vukotich, Jr., which first appeared in Astrophile.

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)
Discoverer / Corona
(USAF)
Discoverer / Corona (USAF) Discoverer / Corona
(USAF)
Discoverer (on other than Discoverer launch covers)
KeyHole (KH)
(USAF)
KeyHole (KH) (USAF) KeyHole (KH)
(USAF)


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

CountryCatalog NumberType of ItemYear of IssueNotes on Content
Discoverer / Corona (USAF)
BatumiLocal_c
Local_ic
One of local post MS6 (a-f)
One of imperforate local post MS6 (a-f)
1997"Discoverer" capsule recovery
BatumiLocal_c o/p1One of local post MS6 (a-f) overprinted in gold1998"Discoverer" capsule recovery
BatumiLocal_c o/p2One of local post MS6 (a-f) overprinted in silver
ChadBL247In (left) margin of SS11996Discoverer-13 re-entry
Germany (West)NoneCachet on cover1964Discoverer
Germany (West)NoneCachet on cover1965Discoverer
Germany (West)NoneCinderella (poster stamp), one of MS30 cinderella~1966"Discoverer-1"
Malagasy Republic1502a (Mi2398)In (lower) margin of SS1 (1502)1999Discoverer capsule recovery
Niger1071b (Mi1884)
i1071b
One of MS4 (1071 (a-d)) (Mi1883-1886)
One of imperforate MS4 (i1071 (a-d))
2001"Discoverer-13 capsule"


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

CountryCancel DateCancel LocationType of ItemNotes on Content
Discoverer / Corona (USAF)
1959-02-28: Discoverer-1
United States1959-02-28Vandenberg AFB, CA(Palmer? printed) cachet on coverDiscoverer-1 launch
United States1959-02-28Vandenberg AFB, CA(Holden purple rubber-stamp) cachet on coverDiscoverer-1 launch
United States1959-02-28Vandenberg AFB, CA(H. Flick printed) cachet on coverDiscoverer-1 launch
United States1959-02-28Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-1 launch (but Vanguard-2 depicted)
United States1959-02-28UNO, VA(UN) cachet on coverDiscoverer-1 launch
Discoverer-1 (anniversaries)
United States2014-02-28Sagamore Beach MA(Coverscape) cachet on cover55th anniv. Discoverer-1 launch
1959-02-28: Discoverer-2
United States1959-04-13Vandenberg AFB, CA(H. Flick printed) cachet on coverDiscoverer-2 launch
United States1959-04-13Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-2 launch (but Vanguard-2 depicted)
United States1959-04-13Vandenberg AFB, CA(Howard Farley) cachet on coverDiscoverer-2 launch
United States1959-04-13Vandenberg AFB, CA(Swanson (color?) rubber-stamp) cachet on (airmail) coverDiscoverer-2 launch
United States1959-04-13Vandenberg AFB, CA(Sarzin) cachet on coverDiscoverer-2 launch
Discoverer-2 (anniversaries)
United States2009-04-13Vandenberg AFB, CA(Mission 57) cachet on cover, also back50th anniv. Discoverer-2 launch
1959-06-03: Discoverer-3 [failed]
United States1959-06-03Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-3 launch [failed]
United States1959-06-03Vandenberg AFB, CA(Holden purple rubber-stamp) cachet on coverDiscoverer-3 launch [failed]
United States1959-06-03Vandenberg AFB, CA(H. Flick) cachet on coverDiscoverer-3 launch [failed]
1959-06-25: Discoverer-4 (KH1-1) [failed]
United States1959-06-25Vandenberg AFB, CA(Holden purple rubber-stamp) cachet on cover, also backDiscoverer-4 launch [failed]
United States1959-06-25Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on (no.10 gift-shop) coverDiscoverer-4 launch [failed]
United States1959-06-25Lompoc CA(Goldcraft Cachets) cachet on coverDiscoverer-4 launch [failed]
United States1959-06-25Lompoc CA(Holden blank) cachet on coverDiscoverer-4 launch [failed]
1959-08-13: Discoverer-5 (KH1-2)
United States1959-08-13Vandenberg AFB, CA(Holden red rubber-stamp) cachet on coverDiscoverer-5 launch
United States1959-08-13Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-5 launch
1959-08-19: Discoverer-6 (KH1-3)
United States1959-08-19Vandenberg AFB, CA(Holden red rubber-stamp) cachet on (no.10 gift-shop) coverDiscoverer-6 launch
United States1959-08-19Vandenberg AFB, CA(Holden purple rubber-stamp) cachet on (no.10 gift-shop) coverDiscoverer-6 launch
1959-11-07: Discoverer-7 (KH1-4)
United States1959-11-07Vandenberg AFB, CA(Zaso) cachet on coverDiscoverer-7 launch
United States1959-11-07Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-7 launch (but Vanguard-2 depicted)
1959-11-20: Discoverer-8 (KH1-5)
United States1959-11-20Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-8 launch (Explorer-6/Pioneer-5 depicted)1
1960-02-04: Discoverer-9 (KH1-6) [failed]
No launch cover images available yet
1960-02-19: Discoverer-10 (KH1-7)
No launch covers are known to exist!
1960-04-15: Discoverer-11 (KH1-8)
United States1960-04-15Vandenberg AFB, CA(Goldcraft Cachets blue) cachet on coverDiscoverer-11 launch (Explorer-6/Pioneer-5 depicted)1
United States1960-04-15Vandenberg AFB, CA(Goldcraft Cachets black) cachet on coverDiscoverer-11 launch (Explorer-6/Pioneer-5 depicted)1
United States1960-04-15Vandenberg AFB, CA(Zaso) cachet on coverDiscoverer-11 launch
1960-06-29: Discoverer-12 [failed]
United States1960-06-29Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-12 launch [failed]
1960-08-10: Discoverer-13
United States1960-08-10Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-13 launch
United States1960-08-10Vandenberg AFB, CA(Zaso?) cachet on coverDiscoverer-13 launch
United States1960-08-10Vandenberg AFB, CA(Holden blue rubber-stamp and typed) cachet on coverDiscoverer-13 launch
United States1960-08-10Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on (airmail) coverDiscoverer-13 launch
Discoverer-13 (events)
United States1960-08-11Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-13 capsule recovery
United States1960-08-11Port Canaveral FL(Red and blue printed) cachet on coverDiscoverer-13 capsule recovery
United States1960-08-11Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-13 capsule recovery
United States1960-08-11Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet (slightly different) on coverDiscoverer-13 capsule recovery
United States1960-08-11Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-13 capsule recovery
United States1960-08-11Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-13 capsule recovery
1960-08-18: Discoverer-14 (KH1-9)
United States1960-08-18Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-14 launch
United States1960-08-18Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-14 launch
United States1960-08-18Vandenberg AFB, CA(Holden blue rubber-stamp and typed) cachet on coverDiscoverer-14 launch
United States1960-08-18Vandenberg AFB, CA(Holden blue and black rubber-stamp) cachet on coverDiscoverer-14 launch
Discoverer-14 (events)
United States1960-08-19Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-14 capsule recovery
United States1960-08-19Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-14 capsule recovery
United States1960-08-19Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-14 capsule recovery
Discoverer-14 (anniversaries)
United States1980-08-18Honolulu HI(MoF no.91) cachet on cover20th anniv. Discoverer-14 capsule recovery
1960-09-13: Discoverer-15 (KH1-10)
United States1960-09-13Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-15 launch
United States1960-09-13Vandenberg AFB, CA(Holden purple rubber-stamp) cachet on coverDiscoverer-15 launch
United States1960-09-13Vandenberg AFB, CA(Holden black rubber-stamp) cachet on cover (different)Discoverer-15 launch
United States1960-09-13Vandenberg AFB, CA(Holden blue rubber-stamp and typed) cachet on cover (different)Discoverer-15 launch
1960-10-26: Discoverer-16 (KH2-1) [failed]
United States1960-10-26Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-16 launch [failed]
United States1960-10-26Vandenberg AFB, CA(Holden blue rubber-stamp and typed) cachet on coverDiscoverer-16 launch [failed]
United States1960-10-26Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-16 launch [failed]
United States1960-10-26Vandenberg AFB, CA(Holden blue rubber-stamp) cachet (different) on (airmail) coverDiscoverer-16 launch [failed]
1960-11-12: Discoverer-17 (KH2-2)
United States1960-11-12Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-17 launch
United States1960-11-12Vandenberg AFB, CA(Holden blue rubber-stamp and typed) cachet on coverDiscoverer-17 launch
United States1960-11-12Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-17 launch
United States1960-11-12Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-17 launch (but Vanguard-2 depicted)
United States1960-11-12Vandenberg AFB, CA(Black and orange printed) cachet on coverDiscoverer-17 launch
United States1960-11-12Vandenberg AFB, CA(Black rubber-stamp) cachet on coverDiscoverer-17 launch
Discoverer-17 (events)
United States1960-11-14Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-17 capsule recovery
United States1960-11-14Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-17 capsule recovery
United States1960-11-14Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-17 capsule recovery
United States1960-11-14Vandenberg AFB, CA(Black rubber-stamp) cachet on coverDiscoverer-17 capsule recovery
United States1960-11-15Sunnyvale CA(Purple rubber-stamp) cachet on (flown) cover, also enclosed letterDiscoverer-17 capsule recovery
1960-12-07: Discoverer-18 (KH2-3)
United States1960-12-07Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-18 launch
United States1960-12-07Vandenberg AFB, CA(Holden blue rubber-stamp and typed) cachet on coverDiscoverer-18 launch
United States1960-12-07Vandenberg AFB, CA(Holden black and purple rubber-stamp) cachet on coverDiscoverer-18 launch
United States1960-12-07Vandenberg AFB, CA(Multi-color printed) cachet on coverDiscoverer-18 launch ("SAMOS" in text)
United States1960-12-07Vandenberg AFB, CA(Black rubber-stamp) cachet on coverDiscoverer-18 launch
Discoverer-18 (events)
United States1960-12-10Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-18 capsule recovery
United States1960-12-10Vandenberg AFB, CA(Holden black and red rubber-stamp) cachet on coverDiscoverer-18 capsule recovery
United States1960-12-10Vandenberg AFB, CA(Holden black and red rubber-stamp) cachet on (airmail) coverDiscoverer-18 capsule recovery
United States1960-12-10Vandenberg AFB, CA(HF) cachet on cover, also insertDiscoverer-18 capsule recovery
1960-12-20: Discoverer-19 (RM-1)
United States1960-12-20Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-19 launch
United States1960-12-20Vandenberg AFB, CA(Multi-color printed) cachet on coverDiscoverer-19 launch ("MIDAS" in text)
United States1960-12-20Vandenberg AFB, CA(Black printed) cachet on coverDiscoverer-19 launch ("MIDAS" in text)
United States1960-12-20Vandenberg AFB, CA(Brown and black printed) cachet on coverDiscoverer-19 launch ("MIDAS" in text)
United States1960-12-20Vandenberg AFB, CA(Black printed) cachet on coverDiscoverer-19 launch
1961-02-17: Discoverer-20 (KH5-1)
United States1961-02-17Vandenberg AFB, CA(Holden black rubber-stamp) cachet on coverDiscoverer-20 launch
United States1961-02-17Vandenberg AFB, CA(Holden black rubber-stamp and hand-written) cachet on coverDiscoverer-20 launch
United States1961-02-17Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-20 launch
United States1961-02-17Vandenberg AFB, CA(Printed) cachet on coverDiscoverer-20 launch
United States1961-02-17?Vandenberg AFB, CA(Vandy? blue rubber-stamp) cachet on coverDiscoverer-20 launch
1961-02-18: Discoverer-21 (RM-2)
United States1961-02-18Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-21 launch
United States1961-02-18Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-21 launch
United States1961-02-18Vandenberg AFB, CA(Black and orange printed) cachet on coverDiscoverer-21 launch; (also "Discoverer-19" and "MIDAS" in text)
1961-03-30: Discoverer-22 (KH2-4) [failed]
United States1961-03-30Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-22 launch [failed]
United States1961-03-30Vandenberg AFB, CA(Holden black rubber-stamp) cachet on coverDiscoverer-22 launch [failed]
United States1961-03-30Vandenberg AFB, CA(Holden black rubber-stamp and hand-printed) cachet on coverDiscoverer-22 launch [failed]
United States1961-03-30Vandenberg AFB, CA(Holden blue and black rubber-stamp and red printed) cachet on coverDiscoverer-22 launch [failed]
1961-04-08: Discoverer-23 (KH5-2)
United States1961-04-08Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-23 launch
United States1961-04-08Vandenberg AFB, CA(Holden black rubber-stamp) cachet on coverDiscoverer-23 launch
United States1961-04-08Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-23 launch
United States1961-04-08Vandenberg AFB, CA(Sarzin) cachet on coverDiscoverer-23 launch
1961-06-08: Discoverer-24 (KH5-3) [failed]
United States1961-06-08Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on (airmail) coverDiscoverer-24 launch [failed]
United States1961-06-08Vandenberg AFB, CA(Holden red printed and blue and black rubber-stamp) cachet (slightly different print as well) on coverDiscoverer-24 launch [failed]
United States1961-06-08Vandenberg AFB, CA(Holden black rubber-stamp) cachet on (airmail) coverDiscoverer-24 launch [failed]
United States1961-06-08Vandenberg AFB, CA(Holden purple rubber-stamp) cachet on coverDiscoverer-24 launch [failed]
1961-06-16: Discoverer-25 (KH2-5)
United States1961-06-16Vandenberg AFB, CA(Holden red printed and blue and black rubber-stamp) cachet on coverDiscoverer-25 launch
United States1961-06-16Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on (airmail) coverDiscoverer-25 launch
United States1961-06-16Vandenberg AFB, CA(Holden blue and purple rubber-stamp) cachet on coverDiscoverer-25 launch
United States1961-06-16Vandenberg AFB, CA(Holden black and purple rubber-stamp) cachet on coverDiscoverer-25 launch
United States1961-06-16Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-25 launch
Discoverer-25 (events)
United States1961-06-19Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on (airmail) coverDiscoverer-25 capsule recovery
United States1961-06-19Vandenberg AFB, CA(Holden black and purple rubber-stamp) cachet on coverDiscoverer-25 capsule recovery
United States1961-06-19Vandenberg AFB, CA(Holden purple rubber-stamp) cachet on coverDiscoverer-25 capsule recovery
1961-07-07: Discoverer-26 (KH2-6)
United States1961-07-07Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on coverDiscoverer-26 launch
United States1961-07-07Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on (airmail) coverDiscoverer-26 launch
United States1961-07-07Vandenberg AFB, CA(Holden black rubber-stamp) cachet on coverDiscoverer-26 launch
United States1961-07-07Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-26 launch
Discoverer-26 (events)
United States1961-07-10Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on coverDiscoverer-26 capsule recovery
United States1961-07-10Vandenberg AFB, CA(Holden black and purple rubber-stamp) cachet on coverDiscoverer-26 capsule recovery
1961-07-22: Discoverer-27 (KH5-4) [failed]
United States1961-07-21Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-27 launch [failed]
United States1961-07-21Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-27 launch [failed]
1961-08-03: Discoverer-28 (KH2-7) [failed]
United States1961-08-03Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-28 launch [failed] (but Vanguard-2 depicted)
United States1961-08-03Vandenberg AFB, CA(Holden red printed and rubber-stamp) cachet on coverDiscoverer-28 launch [failed]
United States1961-08-03Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on coverDiscoverer-28 launch [failed]
United States1961-08-03Vandenberg AFB, CA(Holden blue and purple rubber-stamp) cachet on coverDiscoverer-28 launch [failed]
1961-08-30: Discoverer-29 (KH3-1)
United States1961-08-30Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on coverDiscoverer-29 launch
United States1961-08-30Vandenberg AFB, CA(Holden green and purple rubber-stamp) cachet on coverDiscoverer-29 launch
Discoverer-29 (events)
United States1961-09-02Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on coverDiscoverer-29 capsule recovery
United States1961-09-02Vandenberg AFB, CA(Holden blue and purple rubber-stamp) cachet on coverDiscoverer-29 capsule recovery
1961-09-12: Discoverer-30 (KH3-2)
United States1961-09-12Vandenberg AFB, CA(Holden red printed and blue and green rubber-stamp) cachet on (airmail) coverDiscoverer-30 launch
United States1961-09-12Vandenberg AFB, CA(Holden purple and green rubber-stamp) cachet on (airmail) coverDiscoverer-30 launch
United States1961-09-12Vandenberg AFB, CA(Holden purple and green rubber-stamp) cachet on (airmail) cover (different type)Discoverer-30 launch
United States1961-09-12Vandenberg AFB, CA(Holden blue and green rubber-stamp) cachet on coverDiscoverer-30 launch
United States1961-09-12Vandenberg AFB, CA(Holden purple and green rubber-stamp) cachet on (airmail) coverDiscoverer-30 launch
United States1961-09-12Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-30 launch
Discoverer-30 (events)
United States1961-09-14Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on coverDiscoverer-30 capsule recovery
United States1961-09-14Vandenberg AFB, CA(Holden purple rubber-stamp) cachet on coverDiscoverer-30 capsule recovery
United States1961-09-14Vandenberg AFB, CA(Holden blue-green rubber-stamp) cachet on coverDiscoverer-30 capsule recovery
United States1961-09-14Vandenberg AFB, CA(Holden blue-black rubber-stamp) cachet on coverDiscoverer-30 capsule recovery
United States1961-09-14Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-30 capsule recovery
1961-09-17: Discoverer-31 (KH3-3)
United States1961-09-17Vandenberg AFB, CA(Holden red printed and blue rubber-stamp) cachet on coverDiscoverer-31 launch
United States1961-09-17Vandenberg AFB, CA(Holden blue and purple rubber-stamp) cachet on coverDiscoverer-31 launch
United States1961-09-17Vandenberg AFB, CA(Holden purple rubber-stamp) cachet on (airmail) coverDiscoverer-31 launch
United States1961-09-17Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-31 launch
United States1961-09-17Vandenberg AFB, CA(Vandy? blue rubber-stamp) cachet on coverDiscoverer-31 launch
1961-10-13: Discoverer-32 (KH3-4)
United States1961-10-13Vandenberg AFB, CA(Holden black rubber-stamp) cachet on coverDiscoverer-32 launch
United States1961-10-13Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-32 launch
Discoverer-32 (events)
United States1961-10-16Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-32 capsule recovery
United States1961-10-16Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on coverDiscoverer-32 capsule recovery
United States1961-10-16Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-32 capsule recovery
1961-10-23: Discoverer-33 (KH3-5) [failed]
United States1961-10-23Vandenberg AFB, CA(Holden red printed and blue and purple rubber-stamp) cachet on coverDiscoverer-33 launch [failed]
United States1961-10-23Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-33 launch [failed]
United States1961-10-23Vandenberg AFB, CA(blank/no) cachet (cancel only) on coverDiscoverer-33 launch [failed]
1961-11-05: Discoverer-34 (KH3-6)
United States1961-11-05Vandenberg AFB, CA(Sarzin) cachet on coverDiscoverer-34 launch
United States1961-11-05Vandenberg AFB, CA(Holden red printed and blue and green rubber-stamp) cachet on coverDiscoverer-34 launch
United States1961-11-05Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-34 launch
1961-11-15: Discoverer-35 (KH3-7)
United States1961-11-15Vandenberg AFB, CA(Holden black rubber-stamp) cachet on coverDiscoverer-35 launch
United States1961-11-15Vandenberg AFB, CA(Sarzin) cachet on coverDiscoverer-35 launch (and recovery?)
United States1961-11-15Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-35 launch (and recovery?)
Discoverer-35 (events)
United States1961-11-16Vandenberg AFB, CA(Holden red printed and blue and green rubber-stamp) cachet on coverDiscoverer-35 capsule recovery
United States1961-11-16Vandenberg AFB, CA(Holden blue and green rubber-stamp) cachet on coverDiscoverer-35 capsule recovery
United States1961-11-16Vandenberg AFB, CA(Holden purple and green rubber-stamp) cachet on coverDiscoverer-35 capsule recovery
United States1961-11-16Vandenberg AFB, CA(Holden black and green rubber-stamp) cachet on (airmail) coverDiscoverer-35 capsule recovery
1961-12-12: Discoverer-36 (KH3-8) (and OSCAR-1)
United States1961-12-12Vandenberg AFB, CA(Holden black and red rubber-stamp) cachet on coverDiscoverer-36 launch
United States1961-12-12Vandenberg AFB, CA(Holden blue-green and red rubber-stamp) cachet on coverDiscoverer-36 launch
United States1961-12-12Vandenberg AFB, CA(Holden purple and red rubber-stamp and red printed) cachet on coverDiscoverer-36 launch
Discoverer-36 (events)
United States1961-12-17Vandenberg AFB, CA(Holden red printed and blue and pink rubber-stamp) cachet on coverDiscoverer-36 capsule recovery
United States1961-12-17Vandenberg AFB, CA(Holden black and red rubber-stamp) cachet on coverDiscoverer-36 capsule recovery
United States1961-12-17Vandenberg AFB, CA(Holden blue rubber-stamp) cachet on coverDiscoverer-36 capsule recovery
United States1961-12-17Vandenberg AFB, CA(Holden black and red rubber-stamp) cachet on coverDiscoverer-36 capsule recovery
1962-01-13: Discoverer-37 (KH3-9) [failed]
United States1962-01-15Vandenberg AFB, CA(Holden red rubber-stamp) cachet on coverDiscoverer-37 launch [failed]
United States1962-01-15Vandenberg AFB, CA(Holden blue and pink rubber-stamp) cachet on coverDiscoverer-37 launch [failed]
United States1962-01-15Vandenberg AFB, CA(Goldcraft Cachets) cachet on coverDiscoverer-37 launch [failed]
1962-02-27: Discoverer-38 (KH4-1)
United States1962-02-27Vandenberg AFB, CA(Holden black rubber-stamp) cachet on coverDiscoverer-38 launch
United States1962-02-27Vandenberg AFB, CA(Holden red rubber-stamp) cachet on coverDiscoverer-38 launch
United States1962-02-27Vandenberg AFB, CA(Holden red printed and blue and pink rubber-stamp) cachet on coverDiscoverer-38 launch
Discoverer-38 (events)
United States1962-03-03Vandenberg AFB, CA(Holden black rubber-stamp) cachet on coverDiscoverer-38 capsule recovery
United States1962-03-03Vandenberg AFB, CA(Holden magenta rubber-stamp) cachet on coverDiscoverer-38 capsule recovery
1962-04-18: Discoverer-39 (KH4-2)
United States1962-04-17Vandenberg AFB, CA(Sarzin) cachet on coverDiscoverer-39 launch ("classified secret satellite")
Discoverer (on other than Discoverer launch covers)
United States1962-04-28Vandenberg AFB, CA(Sarzin) cachet on KH4-3 launch coverNot "Discoverer" (as in text)
United States1963-06-26Vandenberg AFB, CA(Sarzin) cachet on KH4-22 and Hitchhiker-1 launch coverNot "Discoverer" (as in text)
United States1963-11-27Vandenberg AFB, CA(Sarzin) cachet on KH4-25 launch coverNot "Discoverer" (as in text)

1Pioneer-5 and Explorer-6 were similar "paddlewheel" satellites. It is believed that Explorer-6 contained two short antennas on its "top", whereas Pioneer-5 contained only a single short antenna. When there are no antennas on top, the distinction is unclear, but of the two, Pioneer-5 is assumed.


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