Auction Date:2013 May 23 @ 18:00 (UTC-05:00 : EST/CDT)
Location:5 Rt 101A Suite 5, Amherst, New Hampshire, 03031, 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
Scarce unflown Block II Apollo sextant. Metal cased unit measures approximately 7 x 6 x 6, with parts having serial numbers SN EE-1 and SN EE-2. The sextant was used with its counterpart (the scanning telescope) to determine the Command Module’s position and attitude with relation to stars or landmarks. This data was then supplied to the onboard computer to calibrate the spacecraft’s Inertial Measurement Unit (IMU). The sextant was a highly accurate optical device capable of measuring the included angle between two targets. Angular sightings of two targets were conducted through the fixed beam splitter and movable mirror located in the sextant head. The sighting head assembly is rotatable to 270 degrees in shaft axis position in either direction, from the zero reference point. The sextant lens provides 1.8-degree true field of view with 28X magnification. The movable mirror is capable of sighting a target to 57 degrees line of sight from the shaft axis. Both the fixed and moveable mirrors are fabricated of beryllium; the beryllium is Kanigen coated and aluminized to obtain maximum reflectivity. The sextant target optics include an indexing mirror assembly and a beam splitter, telescope, and eyepiece assembly.
Auction Location:
5 Rt 101A Suite 5, Amherst, New Hampshire, 03031, United States
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