Showing default

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.

Loading next visibility...

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

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

899, 1964-064A

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

APL

Mission

Spacecraft

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

Unknown

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 EXPLORER 22
1   899U 64064A   26035.71211446  .00000161  00000-0  13359-3 0  9990
2   899  79.6889 271.9669 0119136 186.6955 173.2611 13.83010063 86668

Epoch: 2026-02-04T17:05Z

TLE epoch observation values (Epoch: 2026-02-04T17:05:26.689Z)

Latitude

-0.00004°

Longitude

-119.26907°

Altitude

1,042.809 km

Speed

7.287 km/s

True Right ascension

18h 07m 52s

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

06:58:03

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,037.83 km

Perigee altitude

863.209 km

Semi-major axis

7,328.657 km

Eccentricity

0.01191

Inclination

79.6889°

RAAN

271.9669°

Arg. of periapsis

186.6955°

True anomaly

173.41896°

Mean anomaly

173.2611°

Eccentric anomaly

173.34026°

Mean motion

3.45945 °/min

Orbital period

104.06 mins

BSTAR

0.00013359

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

SCOUT X-4 DEB, 976

SCOUT X-4 DEB, 977

SCOUT X-4 R/B, 907

Did you know?

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

Click here to try in Sandbox

EXPLORER 22 Visibility forecast

Loading observer location...
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	2026-02-05 15:46:04.811Z	158.283° S	2026-02-05 15:51:04.811Z	101.523° ESE	33.173°	2026-02-05 15:57:04.811Z	27.109° NE
9 mins	2026-02-05 17:33:04.811Z	241.214° WSW	2026-02-05 17:37:04.811Z	294.583° NW	27.515°	2026-02-05 17:42:04.811Z	349.865° N
9 mins	2026-02-06 02:41:04.811Z	10.011° NNE	2026-02-06 02:45:04.811Z	79.364° E	34.683°	2026-02-06 02:50:04.811Z	144.019° SSE
7 mins	2026-02-06 04:27:04.811Z	307.406° NW	2026-02-06 04:30:04.811Z	266.885° W	21.576°	2026-02-06 04:34:04.811Z	221.236° SW

Items per page:

1–4 of 4 items

of 1 page

Co-orbital & Co-planar RSOs

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

Please sign-in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

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

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

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.

EXPLORER 22, 899

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-02-04T17:05:26.689Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

EXPLORER 22 Visibility forecast

Co-orbital & Co-planar RSOs

Check out EXPLORER 22, 899 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 12 hours ago