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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

Operational Commercial Imaging

Bus & Motor

CUBESAT 3U, Unknown motor

Mass

5.7 kg wet, 5.7 kg dry

Launch date (UTC)

2025-11-28 (2 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

Expand to show TLE details & history
Last TLE update: 23 hours ago

TLE from 23 hours ago

0 FLOCK 4H 17
1 66720U 25276BG  26034.19281237  .00007808  00000-0  37892-3 0  9996
2 66720  97.4375 110.1340 0004381  77.1215 283.0509 15.18746679 10087

Epoch: 2026-02-03T04:37Z

TLE epoch observation values (Epoch: 2026-02-03T04:37:38.988Z)

Latitude

0°

Longitude

-92.65572°

Altitude

512.035 km

Speed

7.608 km/s

True Right ascension

07h 20m 32s

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

05:35:30

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

509.612 km

Perigee altitude

503.58 km

Semi-major axis

6,884.733 km

Eccentricity

0.00044

Inclination

97.4375°

RAAN

110.134°

Arg. of periapsis

77.1215°

True anomaly

283.00199°

Mean anomaly

283.0509°

Eccentric anomaly

283.02644°

Mean motion

3.79938 °/min

Orbital period

94.75 mins

BSTAR

0.00037892

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

LEMUR-2-STAS-GORBUK, 66686

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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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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.
6 mins	2026-02-04 04:28:41.521Z	136.459° SSE	2026-02-04 04:31:41.521Z	75.323° E	29.445°	2026-02-04 04:34:41.521Z	9.769° NNE
5 mins	2026-02-04 17:34:41.521Z	31.161° NE	2026-02-04 17:36:41.521Z	100.977° ESE	39.028°	2026-02-04 17:39:41.521Z	176.059° S

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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: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2026-02-03T04:37:38.988Z)

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: 23 hours ago