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EXPLORER 22, 899

Orbit data source: Space-Track

EXPLORER 22, 899 is a payload satellite owned by GSFC (US) in LEO that was launched on Sat, 10 Oct 1964 UTC via an SCOUT X-4 launch vehicle from the Air Force Western Test Range (AFWTR). 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 embed code

<iframe src="https://www.satcat.com/sats-embedded/899?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/899?theme=dark&initialShowStats=false

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ISO8601 Format

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ISO8601 Format

Identifier

899, 1964-064A

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

APL

Mission

Civil Science

Bus & Motor

TRANSIT 5, Unknown motor

Mass

52 kg wet, 52 kg dry

Launch date (UTC)

1964-10-10 (61 years ago)

Launch vehicle

SCOUT X-4

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Oct Cyl + 4 Pan + 2 Rod, 2.0 m

Radar Cross Section

1.165 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 7 hours ago

TLE from 7 hours ago

0 EXPLORER 22
1 00899U 64064A   25242.85409087  .00000202  00000-0  17030-3 0  9990
2 00899  79.6874  84.6988 0119508 232.6266 126.3956 13.82925409 64840

Epoch: 2025-08-30T20:29Z

TLE epoch observation values (Epoch: 2025-08-30T20:29:53.451Z)

Latitude

0.00006°

Longitude

157.94368°

Altitude

1,009.008 km

Speed

7.321 km/s

True Right ascension

05h 38m 47s

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

18:55:40

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,038.406 km

Perigee altitude

863.232 km

Semi-major axis

7,328.956 km

Eccentricity

0.01195

Inclination

79.6874°

RAAN

84.6988°

Arg. of periapsis

232.6266°

True anomaly

127.48818°

Mean anomaly

126.3956°

Eccentric anomaly

126.94286°

Mean motion

3.45923 °/min

Orbital period

104.07 mins

BSTAR

0.0001703

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Other satellites on launch #64 in the year 1964 (1964-10-10 UTC)

SCOUT X-4 R/B, 907

SCOUT X-4 DEB, 976

SCOUT X-4 DEB, 977

EXPLORER 22 Visibility forecast

Observer location: undefined°, undefined°
Set Observer location

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.
11 mins	2025-08-31 13:57:53.694Z	170.149° S	2025-08-31 14:03:53.694Z	80.655° E	39.472°	2025-08-31 14:08:53.694Z	22.216° NNE
8 mins	2025-08-31 15:45:53.694Z	255.075° W	2025-08-31 15:48:53.694Z	289.63° WNW	22.181°	2025-08-31 15:53:53.694Z	343.08° N
10 mins	2025-09-01 00:52:53.694Z	358.346° N	2025-09-01 00:57:53.694Z	94.441° ESE	41.504°	2025-09-01 01:02:53.694Z	156.232° SSE
6 mins	2025-09-01 02:39:53.694Z	299.968° NW	2025-09-01 02:41:53.694Z	277.613° WNW	16.929°	2025-09-01 02:45:53.694Z	235.171° WSW