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FLOCK 4H 17, 66720

Orbit data source: Space-Track

FLOCK 4H 17, 66720 is a payload satellite owned by Planet (US) 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/66720?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/66720?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

66720, 2025-276BG

Orbit

SSO

Country

Related business

Planet Labs PBC (US)

Manufacturer

Planet

Mission

Non-operational Commercial Imaging

Bus & Motor

CUBESAT 3U, Unknown motor

Mass

5.7 kg wet, 5.7 kg dry

Launch date (UTC)

2025-11-28 (9 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, 1.0 m

Radar Cross Section

0.072 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 5 hours ago

TLE from 5 hours ago

0 FLOCK 4H 17
1 66720U 25276BG  26238.48832615  .00012428  00000-0  50742-3 0  9999
2 66720  97.4167 311.7517 0004474  84.5214 275.6534 15.24533183 41153

Epoch: 2026-08-26T11:43Z

TLE epoch observation values (Epoch: 2026-08-26T11:43:11.379Z)

Latitude

0°

Longitude

161.21368°

Altitude

494.982 km

Speed

7.617 km/s

True Right ascension

20h 47m 00s

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

08:21:08

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

492.22 km

Perigee altitude

486.075 km

Semi-major axis

6,867.285 km

Eccentricity

0.00045

Inclination

97.4167°

RAAN

311.7517°

Arg. of periapsis

84.5214°

True anomaly

275.60238°

Mean anomaly

275.6534°

Eccentric anomaly

275.62789°

Mean motion

3.81387 °/min

Orbital period

94.39 mins

BSTAR

0.00050742

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

W-SERIES 5, 66747 (Decayed)

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FLOCK 4H 17 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.
4 mins	2026-08-26 17:01:46.988Z	56.037° ENE	2026-08-26 17:03:46.988Z	95.985° ESE	18.306°	2026-08-26 17:05:46.988Z	134.92° SE
4 mins	2026-08-26 18:35:46.988Z	324.457° NNW	2026-08-26 18:36:46.988Z	302.237° NW	21.075°	2026-08-26 18:39:46.988Z	239.543° WSW
6 mins	2026-08-27 05:10:46.988Z	179.329° S	2026-08-27 05:13:46.988Z	303.96° NW	40.053°	2026-08-27 05:16:46.988Z	341.927° 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 FLOCK 4H 17, 66720 on other resources

View FLOCK 4H 17, 66720 on NASA - NSSDCA Website

View FLOCK 4H 17, 66720 on Heavens-Above

View FLOCK 4H 17, 66720 on Keep Track

View FLOCK 4H 17, 66720 on Celestrak

View FLOCK 4H 17, 66720 on Gunter's Space Page

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

FLOCK 4H 17, 66720

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 5 hours ago

TLE from 5 hours ago

TLE epoch observation values (Epoch: 2026-08-26T11:43:11.379Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

FLOCK 4H 17 Visibility forecast

Co-orbital & Co-planar RSOs

Check out FLOCK 4H 17, 66720 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 5 hours ago