Back فانغارد 3 Arabic Vanguard 3 Czech Vanguard 3 Finnish Vanguard 3 French Vanguard 3 Galician Vanguard–3 Hungarian Vanguard 3 Dutch Vanguard 3 NN Vanguard 3 Polish Авангард-3 Russian
 Vanguard 3 satellite | |
| Names | Vanguard Space Launch Vehicle-7 Vanguard-TV4BU |
|---|---|
| Mission type | Earth science |
| Operator | Naval Research Laboratory |
| Harvard designation | 1959 Eta 1 |
| COSPAR ID | 1959-007A |
| SATCAT no. | 00020 |
| Mission duration | 90 days (planned) 64 years, 8 months and 23 days (in orbit) |
| Spacecraft properties | |
| Spacecraft | Vanguard 3C |
| Spacecraft type | Vanguard |
| Manufacturer | Naval Research Laboratory |
| Launch mass | 42.9 kg (95 lb) |
| Dimensions | 50.8 cm (20.0 in) diameter |
| Start of mission | |
| Launch date | 18 September 1959, 05:20:07 GMT[1] |
| Rocket | Vanguard SLV-7 |
| Launch site | Cape Canaveral, LC-18A |
| Contractor | Glenn L. Martin Company |
| End of mission | |
| Last contact | 11 December 1959 |
| Decay date | 2259 (estimated) ~ 300 years orbital lifetime [2] |
| Orbital parameters | |
| Reference system | Geocentric orbit[3] |
| Regime | Medium Earth orbit |
| Perigee altitude | 512 km (318 mi) |
| Apogee altitude | 3,750 km (2,330 mi) |
| Inclination | 33.35° |
| Period | 130.0 minutes |
| Instruments | |
| Proton Precessional Magnetometer Micrometeorite Detectors Satellite Drag Atmospheric Density X-Ray Experiment | |
Vanguard 3 (Harvard designation: 1959 Eta 1[4]) is a scientific satellite that was launched into Earth orbit by the Vanguard SLV-7 on 18 September 1959, the third successful Vanguard launch out of eleven attempts. Vanguard rocket: Vanguard Satellite Launch Vehicle-7 (SLV-7) was an unused Vanguard TV-4BU (TV-4BU=Test Vehicle-Four BackUp) rocket, updated to the final production Satellite Launch Vehicle (SLV).[5]
Project Vanguard was a program managed by the United States Naval Research Laboratory (NRL), and designed and built by the Glenn L. Martin Company (now Lockheed Martin), which intended to launch the first artificial satellite into Earth orbit using a Vanguard rocket.[6] as the launch vehicle from Cape Canaveral, Florida. Vanguard 3 was an important part of the Space Race between the U.S. and the Soviet Union.
- ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Report. Retrieved 7 December 2013.
- ^ "Display: Vanguard 3 1959-007A". NASA. 14 May 2020. Retrieved 5 February 2021.
This article incorporates text from this source, which is in the public domain.
- ^ "VANGUARD 3 1959-007A NORAD 20". N2YO.com. Retrieved 4 February 2021.
- ^ Yost, Charles W. (6 September 1963). "Registration data for United States Space Launches" (PDF). United Nations Office for Outer Space Affairs. Retrieved 19 February 2009.
- ^ Project Vanguard: The NASA History, By Constance McLaughlin Green, Milton Lomask, January 9, 2009, page 228 This article incorporates text from this source, which is in the public domain.
- ^ "The Vanguard Satellite Launching Vehicle — An Engineering Summary" B. Klawans April 1960, 212 pages Martin Company Engineering Report No 11022, PDF of an optical copy This article incorporates text from this source, which is in the public domain.
© MMXXIII Rich X Search. We shall prevail. All rights reserved. Rich X Search