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EXPLORER 7, 22

Orbit data source: Space-Track

EXPLORER 7, 22 is a payload satellite owned by GSFC (US) in LEO that was launched on Tue, 13 Oct 1959 UTC via a JUNO II launch vehicle from the Air Force Eastern Test Range (AFETR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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<iframe src="https://www.satcat.com/sats-embedded/22?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/22?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

22, 1959-009A

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

ABMA

Mission

Spacecraft

Bus & Motor

S-1, Unknown motor

Mass

41 kg wet, 41 kg dry

Launch date (UTC)

1959-10-13 (66 years ago)

Launch vehicle

JUNO II

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 14 hours ago

TLE from 14 hours ago

0 EXPLORER 7
1 00022U 59009A   25354.12517571  .00006836  00000-0  26531-3 0  9998
2 00022  50.2514 262.6756 0085879 123.9273 236.9889 15.23887447772999

Epoch: 2025-12-20T03:00Z

TLE epoch observation values (Epoch: 2025-12-20T03:00:15.181Z)

Latitude

0.00003°

Longitude

128.6559°

Altitude

527.215 km

Speed

7.583 km/s

True Right ascension

17h 30m 42s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

15:39:03

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

553.883 km

Perigee altitude

435.834 km

Semi-major axis

6,872.996 km

Eccentricity

0.00859

Inclination

50.2514°

RAAN

262.6756°

Arg. of periapsis

123.9273°

True anomaly

236.16849°

Mean anomaly

236.9889°

Eccentric anomaly

236.57822°

Mean motion

3.80911 °/min

Orbital period

94.51 mins

BSTAR

0.00026531

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Other satellites on launch #9 in the year 1959 (1959-10-13 UTC)

JUNO II R/B, 23 (Decayed)

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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

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EXPLORER 7 Visibility forecast

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Span	Click to sort rows by Start time (UTC) header in descending order	Start Az.	Max El. time (UTC)	Max El. Az.	Max El.	End time (UTC)	End Az.
6 mins	2025-12-20 20:29:27.388Z	201.735° SSW	2025-12-20 20:32:27.388Z	123.779° SE	31.205°	2025-12-20 20:35:27.388Z	69.596° E
5 mins	2025-12-20 22:08:27.388Z	277.498° WNW	2025-12-20 22:10:27.388Z	325.173° NNW	28.999°	2025-12-20 22:13:27.388Z	37.728° NE
5 mins	2025-12-21 03:06:27.388Z	309.328° NW	2025-12-21 03:08:27.388Z	16.751° NNE	44.328°	2025-12-21 03:11:27.388Z	120.546° SE

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out EXPLORER 7, 22 on other resources

View EXPLORER 7, 22 on NASA - NSSDCA Website

View EXPLORER 7, 22 on Heavens-Above

View EXPLORER 7, 22 on Keep Track

View EXPLORER 7, 22 on Celestrak

View EXPLORER 7, 22 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

EXPLORER 7, 22

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 14 hours ago

TLE from 14 hours ago

TLE epoch observation values (Epoch: 2025-12-20T03:00:15.181Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #9 in the year 1959 (1959-10-13 UTC)

EXPLORER 7 Visibility forecast

Co-orbital & Co-planar RSOs

Check out EXPLORER 7, 22 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 14 hours ago