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Otto Berg's Explorer 33/35 Cosmic Dust Experiment Flight Spare

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:1,500.00 - 2,500.00 USD
Otto Berg's Explorer 33/35 Cosmic Dust Experiment Flight Spare

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Auction Date:2022 Dec 15 @ 18:00 (UTC-5 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Otto Berg's flight spare of a cosmic dust detector experiment built for the Interplanetary Monitoring Platforms (IMP-D and IMP-E) carried on Explorer 33 and Explorer 35. The unit measures 8Àù x 10Àù x 6.5Àù and features a sensor system in four different axes, with electrical ports on one side of the housing. The device is labeled: "Marshall Laboratories, Torrance, California, Model ML195-1, 6A18-1-J1, Serial No. 3, Part No. 50711-101, Weight 1279 GMS." In fine condition.

Explorer 33, launched on July 1, 1966, and Explorer 35, launched on July 19, 1967, were similar in design, and both intended to study the environment around Earth at lunar distances, aiding the Apollo program. They were outfitted with instruments for studies of interplanetary plasma, energetic charged particles (electrons, protons, and alphas), cosmic dust, magnetic fields, and solar X-rays.