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EXCITE, 43819

Orbit data source: Space-Track

EXCITE, 43819 is a payload satellite owned by DARPA (US) in SSO that was launched on Mon, 03 Dec 2018 UTC via an FALCON 9 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/43819?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/43819?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

43819, 2018-099BP

Orbit

SSO

Country

Related business

Defense Advanced Research Projects Agency (US)

Manufacturer

NovaWurks

Mission

Operational Defense Technology

Bus & Motor

HISAT, Unknown motor

Mass

~155 kg wet, ~155 kg dry

Launch date (UTC)

2018-12-03 (8 years ago)

Launch vehicle

FALCON 9

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box, 0.5 m

Radar Cross Section

1.500 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 19 hours ago

TLE from 19 hours ago

0 EXCITE
1 43819U 18099BP  26235.55639459  .00001540  00000-0  10718-3 0  9996
2 43819  97.3931 271.6585 0019819 118.1204 242.2030 15.06742806421894

Epoch: 2026-08-23T13:21Z

TLE epoch observation values (Epoch: 2026-08-23T13:21:12.492Z)

Latitude

-0.00003°

Longitude

99.5057°

Altitude

555.656 km

Speed

7.58 km/s

True Right ascension

18h 06m 38s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

23:04:02

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

556.861 km

Perigee altitude

529.427 km

Semi-major axis

6,921.281 km

Eccentricity

0.00198

Inclination

97.3931°

RAAN

271.6585°

Arg. of periapsis

118.1204°

True anomaly

242.00233°

Mean anomaly

242.203°

Eccentric anomaly

242.10264°

Mean motion

3.76932 °/min

Orbital period

95.51 mins

BSTAR

0.00010718

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Other satellites on launch #99 in the year 2018 (2018-12-03 UTC)

SIRION PATHFINDER-2, 43759

HAWK-B, 43794

MOVE-II, 43780 (Decayed)

NEXTSAT-1, 43811

ORBWEAVER 2, 43785 (Decayed)

OBJECT BA, 43806

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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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EXCITE 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.
7 mins	2026-08-24 15:25:03.916Z	9.218° NNE	2026-08-24 15:28:03.916Z	327.619° NNW	44.278°	2026-08-24 15:32:03.916Z	196.404° SSW
6 mins	2026-08-25 02:09:03.916Z	140.258° SSE	2026-08-25 02:12:03.916Z	55.278° ENE	34.493°	2026-08-25 02:15:03.916Z	2.622° NNE

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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 EXCITE, 43819 on other resources

View EXCITE, 43819 on NASA - NSSDCA Website

View EXCITE, 43819 on Heavens-Above

View EXCITE, 43819 on Keep Track

View EXCITE, 43819 on Celestrak

View EXCITE, 43819 on Gunter's Space Page

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

EXCITE, 43819

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 19 hours ago

TLE from 19 hours ago

TLE epoch observation values (Epoch: 2026-08-23T13:21:12.492Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #99 in the year 2018 (2018-12-03 UTC)

EXCITE Visibility forecast

Co-orbital & Co-planar RSOs

Check out EXCITE, 43819 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 19 hours ago