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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 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

Identifier

899, 1964-064A

Orbit

LEO

Last TLE update

7 hours ago

Origin

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, 4 m

Radar Cross Section

1.165 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 7 hours ago

0 EXPLORER 22
1 00899U 64064A   25182.87771517  .00000170  00000-0  14121-3 0  9997
2 00899  79.6897 150.3184 0120833  27.1803 333.5602 13.82907388 56556

Epoch: 2025-07-01T21:03Z

TLE epoch observation values (Epoch: 2025-07-01T21:03:54.59Z)

Latitude

-0.00008°

Longitude

-85.82593°

Altitude

877.277 km

Speed

7.454 km/s

True Right ascension

10h 01m 16s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-74.67299°

Longitude

-127.44885°

Altitude

1,002.55 km

Speed

7.339 km/s

Apparent Right ascension

04h 22m 38s

Apparent Declination

-61° 11' 03"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

15:19:22

Azimuth

199.331° SSW

Elevation

-66.621°

Doppler factor

Orbital elements

Apogee altitude

1,039.441 km

Perigee altitude

862.324 km

Semi-major axis

7,329.019 km

Eccentricity

0.01208

Inclination

79.6897°

RAAN

150.3184°

Arg. of periapsis

27.1803°

True anomaly

Unknown

Mean anomaly

333.5602°

Eccentric anomaly

Unknown

Mean motion

3.45919 °/min

Orbital period

104.07 mins

BSTAR

0.00014121

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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°

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	2025-07-02 08:04:06.353Z	32.193° NE	2025-07-02 08:07:06.353Z	64.243° ENE	16.361°	2025-07-02 08:10:06.353Z	95.624° ESE
11 mins	2025-07-02 09:48:06.353Z	343.594° N	2025-07-02 09:53:06.353Z	253.437° W	43.921°	2025-07-02 09:59:06.353Z	177.999° S
6 mins	2025-07-02 21:31:06.353Z	120.821° SE	2025-07-02 21:34:06.353Z	81.356° E	18.98°	2025-07-02 21:37:06.353Z	47.039° ENE
9 mins	2025-07-02 23:14:06.353Z	215.36° SW	2025-07-02 23:18:06.353Z	272.801° WNW	36.51°	2025-07-02 23:23:06.353Z	357.035° N

Authenticating...

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Check out EXPLORER 22, 899 on other resources

View EXPLORER 22, 899 on NASA - NSSDCA Website

View EXPLORER 22, 899 on Heavens-Above

View EXPLORER 22, 899 on Keep Track

View EXPLORER 22, 899 on Celestrak

View EXPLORER 22, 899 on Gunter's Space Page

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