ID: 26461352
Closed
Bidding has ended on this item.
1964 Explorer 26 Radiation Belts study for Apollo Lunar Landing
$3.25
Seller:
honestyplus (7281)
Current Bid: $3.25
Bids: 8
Condition:Explorer 26 was a spin-stabilized, solar-cell-powered spacecraft instrumented to measure trapped particles and the geomagnetic field. Explorer 26 was a spin-stabilized, solar-cell-powered spacecraft instr ... Read More
Item Specifics
- Country
- United States
- Stamp Format
- Single
Item Description
Condition:Explorer 26 was a spin-stabilized, solar-cell-powered spacecraft instrumented to measure trapped particles and the geomagnetic field.Explorer 26 was a spin-stabilized, solar-cell-powered spacecraft instrumented to measure trapped particles and the geomagnetic field. A 16-channel PFM/PM time-division multiplexed telemeter was used. The time required to sample the 16 channels (one frame period) was 0.29 s. Half of the channels were used to convey eight-level digital information. The other channels were used for analog information. During ground processing, the analog information was digitized with an accuracy of 1/800th of full scale. One analog channel was subcommutated in a 16-frame-long pattern and used to telemeter spacecraft temperatures, power system voltages, currents, etc. A digital solar aspect sensor measured the spin period and phase, digitized to 0.036 s, and the angle between the spin axis and sun direction to about 3-deg intervals. The spacecraft systems functioned well, except for some undervoltage turnoffs, until May 26, 1967, when the telemeter failed. The initial spin rate was 33 rpm, and the spin axis direction was right ascension 272.8 deg and declination 21.5 deg. The spin rate decreased with time to 2 rpm on September 9, 1965. For the balance of its life, the spacecraft was coning or tumbling at a rate of about 1 rpm.
American Philatelic Society dealer member
American Numismatic Association life member
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Seller Information
- Seller
- honestyplus (7281)
- Registered Since
- 01/10/2007
- Feedback
- 100%
- Store
- Lewis Burchett
Bids History
| Bidder | Amount | Date |
|---|---|---|
| safetyman (776) | $3.25 | 06/06/2019 20:31:05 |
| vcl59 (767) | $3.00 | 06/06/2019 00:43:03 |
| safetyman (776) | $2.78 | 06/06/2019 00:43:03 |
| vcl59 (767) | $2.03 | 06/06/2019 00:40:43 |
| safetyman (776) | $1.78 | 06/06/2019 00:40:43 |
| vcl59 (767) | $0.81 | 06/05/2019 06:35:42 |
| safetyman (776) | $0.76 | 06/05/2019 06:35:42 |
| safetyman (776) | $0.01 | 06/05/2019 01:06:21 |
Sales History
| User | Price | Quantity | Date |
|---|---|---|---|
| safetyman (776) | $3.25 | 1 | 06/06/2019 20:59:01 |
- Item Location
- Arkansas, United States
- Ships To
- United States
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- Returns Accepted
- Yes
- Returns Policy
- Money Back - Returns Accepted within 60 Days (Seller pays Shipping Cost)
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