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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, 0.9 m

Radar Cross Section

1.500 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 10 hours ago

TLE from 10 hours ago

0 EXCITE
1 43819U 18099BP  26285.09583321  .00002147  00000-0  14740-3 0  9999
2 43819  97.3860 319.2085 0016896 314.5579  45.4269 15.06900273429358

Epoch: 2026-10-12T02:17Z

TLE epoch observation values (Epoch: 2026-10-12T02:17:59.989Z)

Latitude

0.00002°

Longitude

-95.97063°

Altitude

540.55 km

Speed

7.597 km/s

True Right ascension

21h 16m 50s

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

06:54:19

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

554.355 km

Perigee altitude

530.968 km

Semi-major axis

6,920.798 km

Eccentricity

0.00169

Inclination

97.386°

RAAN

319.2085°

Arg. of periapsis

314.5579°

True anomaly

45.56503°

Mean anomaly

45.4269°

Eccentric anomaly

45.49594°

Mean motion

3.76972 °/min

Orbital period

95.5 mins

BSTAR

0.0001474

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

BRIO, 43813 (Decayed)

PW-SAT2, 43814 (Decayed)

SPACEBEE-7, 43816 (Decayed)

ELYUSIUM/LOWER FREE FLYE, 43760 (Decayed)

OBJECT AH, 43789 (Decayed)

UPPER FREE FLYER, 43763

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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.
6 mins	2026-10-12 15:37:24.737Z	352.817° N	2026-10-12 15:39:24.737Z	308.706° NW	46.949°	2026-10-12 15:43:24.737Z	211.954° SW
6 mins	2026-10-13 02:20:24.737Z	158.878° S	2026-10-13 02:23:24.737Z	27.187° NE	66.795°	2026-10-13 02:26:24.737Z	352.563° N

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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: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-10-12T02:17:59.989Z)

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: 10 hours ago