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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 (4 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

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

TLE from 10 hours ago

0 FORMOSAT-8A
1 66666U 25276A   26095.47979199  .00003094  00000-0  24801-3 0  9993
2 66666  97.6529 170.7867 0003971 156.0061 204.1349 15.00846759 19159

Epoch: 2026-04-05T11:30Z

TLE epoch observation values (Epoch: 2026-04-05T11:30:54.027Z)

Latitude

-0.00002°

Longitude

164.27697°

Altitude

569.858 km

Speed

7.575 km/s

True Right ascension

11h 23m 08s

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

03:56:54

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

564.042 km

Perigee altitude

558.53 km

Semi-major axis

6,939.423 km

Eccentricity

0.0004

Inclination

97.6529°

RAAN

170.7867°

Arg. of periapsis

156.0061°

True anomaly

204.1163°

Mean anomaly

204.1349°

Eccentric anomaly

204.1256°

Mean motion

3.75455 °/min

Orbital period

95.88 mins

BSTAR

0.00024801

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

PIAST-M, 66758

OBJECT F, 66671

OBJECT V, 66685

IMPULSE-3 MIRA, 66687

LEMUR-2-STAS-GORBUK, 66686

LEMUR-2-FINNIAN, 66782

OBJECT M, 66677

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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.
5 mins	2026-04-06 05:15:31.248Z	189.268° SSW	2026-04-06 05:17:31.248Z	257.842° W	40.478°	2026-04-06 05:20:31.248Z	336.15° NNW
5 mins	2026-04-06 18:29:31.248Z	338.523° N	2026-04-06 18:31:31.248Z	294.146° NW	27.246°	2026-04-06 18:34:31.248Z	231.954° WSW

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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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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

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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: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-04-05T11:30:54.027Z)

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: 10 hours ago