File:Explorer1.jpg · Wikimedia Commons · See Wikimedia Commons
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AI overview
Explorer 1 was the first satellite launched by the United States, sent into orbit in 1958 during the Space Race with the Soviet Union. It mattered because it demonstrated American capability in space technology and carried instruments that made important scientific discoveries, including detecting the radiation belts around Earth.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Names
- Explorer I, 1958 Alpha 1
- Mission type
- Earth science
- Operator
- JPL / ABMA
- Harvard designation
- 1958 Alpha 1
- Cospar id
- 1958-001A
- Satcat number span no
- 00004
- Mission duration
- 120 days (planned), 111 days (achieved)
- Spacecraft
- Explorer I
- Spacecraft type
- Science Explorer
- Bus
- Explorer 1
- Manufacturer
- Jet Propulsion Laboratory
- Launch mass
- 13.97 kg (30.8 lb)
- Dimensions
- 203 cm (80 in) length, 15.2 cm (6.0 in) diameter
- Power
- 60 watts
- Launch date
- 1 February 1958, 03:47:56 GMT
- Rocket
- Juno I (RS-29)
- Launch site
- Atlantic Missile Range , LC-26A
- Contractor
- Army Ballistic Missile Agency
via Wikipedia infobox
Wikidata facts
- Instance of
- artificial satellite
- Operator
- Army Ballistic Missile Agency
- Followed by
- Explorer 2
- Duration
- 9590400
- Developer
- Jet Propulsion Laboratory
- Parent body
- Earth
- Mass
- 13.97
- Orbital period
- 114.8
- Manufacturer
- Jet Propulsion Laboratory
- Image
- Explorer1.jpg
- Significant event
- atmospheric entry
Show 18 more facts
- Commons category
- Explorer 1
- carries scientific instrument
- Geiger counter
- UTC date of spacecraft launch
- 1958-02-01
- space launch vehicle
- Juno I
- Commons gallery
- Explorer 1
- time of object orbit decay
- 1970-03-31
- start point
- Cape Canaveral Launch Complex 26
- type of orbit
- medium Earth orbit
- periapsis
- 358
- apoapsis
- 2550
- orbital inclination
- 33.24
- orbital eccentricity
- 0.140
- semi-major axis of an orbit
- 7832.2
- argument of periapsis
- 311.5310
- mean anomaly
- 48.3249
- longitude of ascending node
- 334.617
- nominal power output
- 60
- native label
- Explorer 1
via Wikidata · CC0