1961 in spaceflight
Quick facts Orbital launches, First …
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The Vostok 1 spacecraft, aboard which Yuri Gagarin became the first man to orbit the Earth on 12 April 1961
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| Orbital launches | |
|---|---|
| First | 31 January |
| Last | 22 December |
| Total | 50 |
| Successes | 28 |
| Failures | 20 |
| Partial failures | 2 |
| Catalogued | 36 |
| National firsts | |
| Spaceflight |  Italy |
| Space traveller |  Soviet Union United States |
| Rockets | |
| Maiden flights | Atlas LV-3A Agena-B Kosmos-2I 63S1 Saturn I (suborbital test) |
| Retirements | Atlas LV-3A Agena-A Juno II |
| Crewed flights | |
| Orbital | 2 |
| Suborbital | 2 |
| Total travellers | 4 |
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Main articles: 1961 in spaceflight (January–June) and 1961 in spaceflight (July-December)
More information Date/Time (UTC), Source object …
| Date/Time (UTC) | Source object | Event type | Pieces tracked | Remarks |
|---|---|---|---|---|
| 29 June[2] | Thor-Able upper stage of Transit 4A navigation satellite | Rocket explosion | 294[2] | First explosion of a rocket stage in orbit creating hundreds of debris pieces |
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More information Country, Launches …
| Country | Launches | Successes | Failures | Partial failures |
|
|---|---|---|---|---|---|
| Soviet Union |
9 | 5 | 4 | 0 | |
| United States |
41 | 23 | 16 | 2 | |
| World | 50 | 28 | 20 | 2 | |
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By rocket
More information Rocket, Country …
| Rocket | Country | Launches | Successes | Failures | Partial failures | Remarks |
|---|---|---|---|---|---|---|
| Atlas LV-3A Agena-A | United States |
1 | 1 | 0 | 0 | Retired |
| Atlas LV-3A Agena-B | United States |
7 | 2 | 4 | 1 | Maiden flight |
| Atlas LV-3B | United States |
3 | 2 | 1 | 0 | First orbital launch |
| RM-90 Blue Scout II | United States |
1 | 0 | 1 | 0 | First orbital launch |
| Juno II | United States |
3 | 1 | 2 | 0 | Retired |
| Kosmos-2I 63S1 | Soviet Union |
2 | 0 | 2 | 0 | Maiden flight |
| Molniya 8K78 | Soviet Union |
2 | 1 | 1 | 0 | |
| Scout X-1 | United States |
3 | 1 | 2 | 0 | |
| Thor DM-21 Ablestar | United States |
3 | 2 | 0 | 1 | |
| Thor DM-21 Agena-B | United States |
17 | 11 | 6 | 0 | |
| Thor DM-19 Delta | United States |
3 | 3 | 0 | 0 | |
| Vostok-K 8K72K | Soviet Union |
5 | 4 | 1 | 0 |
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By orbit
More information Orbital regime, Launches …
| Orbital regime | Launches | Achieved | Not Achieved | Accidentally Achieved | Remarks |
|---|---|---|---|---|---|
| Low Earth | 41 | 28 | 13 | 3 | |
| Medium Earth | 1 | 1 | 0 | 0 | |
| High Earth | 6 | 2 | 4 | 0 | Including Highly elliptical orbits |
| Heliocentric | 2 | 1 | 1 | 0 |
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Bergin, Chris. “NASASpaceFlight.com”.
- Clark, Stephen. “Spaceflight Now”.
- Kelso, T.S. “Satellite Catalog (SATCAT)”. CelesTrak.
- Krebs, Gunter. “Chronology of Space Launches”.
- Kyle, Ed. “Space Launch Report”. Archived from the original on 5 October 2009. Retrieved 13 August 2022.
- McDowell, Jonathan. “GCAT Orbital Launch Log”.
- Pietrobon, Steven. “Steven Pietrobon’s Space Archive”.
- Wade, Mark. “Encyclopedia Astronautica”.
- Webb, Brian. “Southwest Space Archive”.
- Zak, Anatoly. “Russian Space Web”.
- “ISS Calendar”. Spaceflight 101.
- “NSSDCA Master Catalog”. NASA Space Science Data Coordinated Archive. NASA Goddard Space Flight Center.
- “Хроника освоения космоса” [Chronicle of space exploration]. CosmoWorld (in Russian).
- “Rocket Launch Manifest”. Next Spaceflight.
- “Space Launch Plans”. Novosti Kosmonavtiki.
Generic references:
Footnotes
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“Venera 1”. NSSDCA Master Catalog. NASA. 1961-003A. Archived from the original on 5 August 2021. Retrieved 12 September 2023.
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Orbital Debris: A Chronology (PDF). NASA JSC. January 1999. p. 18. Archived from the original (PDF) on 1 September 2000. Retrieved 13 February 2016.
Two hours after separating from the U.S. Transit 4-A satellite, its Able Star upper stage becomes the first known artificial object to break up unintentionally in space. The cause of the explosion is unknown. The event produces at least 294 trackable pieces, more than tripling the number of known satellites of Earth.
Source: Wikipedia. License: CC BY-SA 4.0. Changes may have been made. See authors on source page history.
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