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FORMOSAT-8A, 66666

Orbit data source: Space-Track

FORMOSAT-8A, 66666 is a payload satellite owned by TASA (TW) in SSO that was launched on Fri, 28 Nov 2025 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/66666?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/66666?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

66666, 2025-276A

Orbit

SSO

Country

TW / TWN

Related business

Taiwan Space Agency (TW)

Manufacturer

TASA

Mission

Operational Civil Imaging/Sci

Bus & Motor

FS8, AOCS

Mass

380 kg wet, 380 kg dry

Launch date (UTC)

2025-11-28 (7 months ago)

Launch vehicle

FALCON 9

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 2.2 m

Radar Cross Section

3.681 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 11 hours ago

TLE from 11 hours ago

0 FORMOSAT-8A
1 66666U 25276A   26192.67576758  .00000961  00000-0  80445-4 0  9994
2 66666  97.6547 266.5503 0005119 141.2840 218.8751 15.00745196 33739

Epoch: 2026-07-11T16:13Z

TLE epoch observation values (Epoch: 2026-07-11T16:13:06.318Z)

Latitude

-0.00012°

Longitude

93.68842°

Altitude

570.422 km

Speed

7.574 km/s

True Right ascension

17h 46m 12s

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

15:43:06

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

565.152 km

Perigee altitude

558.047 km

Semi-major axis

6,939.736 km

Eccentricity

0.00051

Inclination

97.6547°

RAAN

266.5503°

Arg. of periapsis

141.284°

True anomaly

218.8383°

Mean anomaly

218.8751°

Eccentric anomaly

218.8567°

Mean motion

3.7543 °/min

Orbital period

95.89 mins

BSTAR

0.000080445

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Other satellites on launch #276 in the year 2025 (2025-11-28 UTC)

LEMUR-2-STARLIGHT, 66783

FLOCK 4H 19, 66722

FLOCK 4H 32, 66735

LEMUR-2-DEANANDMAEVE, 66680

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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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FORMOSAT-8A 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	2026-07-12 05:08:24.257Z	175.685° S	2026-07-12 05:11:24.257Z	215.534° SW	41.586°	2026-07-12 05:15:24.257Z	341.95° N
5 mins	2026-07-12 18:24:24.257Z	334.507° NNW	2026-07-12 18:26:24.257Z	275.981° WNW	29.964°	2026-07-12 18:29:24.257Z	223.347° SW

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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 FORMOSAT-8A, 66666 on other resources

View FORMOSAT-8A, 66666 on NASA - NSSDCA Website

View FORMOSAT-8A, 66666 on Heavens-Above

View FORMOSAT-8A, 66666 on Keep Track

View FORMOSAT-8A, 66666 on Celestrak

View FORMOSAT-8A, 66666 on Gunter's Space Page

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

FORMOSAT-8A, 66666

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2026-07-11T16:13:06.318Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #276 in the year 2025 (2025-11-28 UTC)

FORMOSAT-8A Visibility forecast

Co-orbital & Co-planar RSOs

Check out FORMOSAT-8A, 66666 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 11 hours ago