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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

13 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 13 hours ago

0 EXPLORER 22
1 00899U 64064A   25128.68809212  .00000223  00000-0  18701-3 0  9997
2 00899  79.6915 209.5947 0120850 165.6817 194.7810 13.82888949 49060

Epoch: 2025-05-08T16:30Z

Definitive object data (Epoch: 2025-05-08T16:30:51.159Z)

Latitude

-0.00001°

Longitude

95.12654°

Altitude

1,042.225 km

Speed

7.288 km/s

True Right ascension

13h 58m 22s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow at TLE epoch

Visualization TLE readout

Latitude

78.64558°

Longitude

158.84846°

Altitude

949.246 km

Speed

7.393 km/s

Apparent Right ascension

00h 04m 58s

Apparent Declination

33° 09' 05"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

13:13:37

Azimuth

14.837° NNE

Elevation

-15.227°

Doppler factor

Orbital elements

Apogee altitude

1,039.52 km

Perigee altitude

862.376 km

Semi-major axis

7,329.085 km

Eccentricity

0.012085

Inclination

79.6915°

RAAN

209.5947°

Arg. of periapsis

165.6817°

True anomaly

194.43278°

Mean anomaly

194.781°

Eccentric anomaly

194.60639°

Mean motion

3.45914 °/min

BSTAR

0.00018701

Orbital period

104.07 mins

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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.
12 mins	2025-05-09 06:30:01.195Z	198.567° SSW	2025-05-09 06:36:01.195Z	253.544° W	42.855°	2025-05-09 06:42:01.195Z	5.772° NNE
6 mins	2025-05-09 15:41:01.195Z	28.343° NE	2025-05-09 15:44:01.195Z	63.078° ENE	17.301°	2025-05-09 15:47:01.195Z	99.026° ESE
9 mins	2025-05-09 17:26:01.195Z	336.156° NNW	2025-05-09 17:30:01.195Z	259.076° W	40.547°	2025-05-09 17:35:01.195Z	186.251° SSW

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.