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FLOCK 4H 25, 66728

Orbit data source: Space-Track

FLOCK 4H 25, 66728 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 URL

https://www.satcat.com/sats-embedded/66728?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

66728, 2025-276BQ

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 (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: 1 day ago

TLE from 1 day ago

0 FLOCK 4H 25
1 66728U 25276BQ  26238.16197509  .00005872  00000-0  26480-3 0  9995
2 66728  97.4151 310.8616 0002183  85.4087 274.7398 15.21395686 40357

Epoch: 2026-08-26T03:53Z

TLE epoch observation values (Epoch: 2026-08-26T03:53:14.647Z)

Latitude

-0.00006°

Longitude

-81.86836°

Altitude

504.598 km

Speed

7.612 km/s

True Right ascension

20h 43m 26s

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

20:35:26

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

500.095 km

Perigee altitude

497.093 km

Semi-major axis

6,876.731 km

Eccentricity

0.00022

Inclination

97.4151°

RAAN

310.8616°

Arg. of periapsis

85.4087°

True anomaly

274.71487°

Mean anomaly

274.7398°

Eccentric anomaly

274.72733°

Mean motion

3.80601 °/min

Orbital period

94.59 mins

BSTAR

0.0002648

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

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FLOCK 4H 25 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	2026-08-27 05:16:04.352Z	186.311° SSW	2026-08-27 05:19:04.352Z	264.601° W	37.619°	2026-08-27 05:22:04.352Z	335.049° NNW
4 mins	2026-08-27 18:21:04.352Z	331.971° NNW	2026-08-27 18:23:04.352Z	269.525° W	27.845°	2026-08-27 18:25:04.352Z	229.093° WSW
5 mins	2026-08-28 04:58:04.352Z	164.671° S	2026-08-28 05:00:04.352Z	4.153° NNE	44.271°	2026-08-28 05:03:04.352Z	349.081° 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 25, 66728 on other resources

View FLOCK 4H 25, 66728 on NASA - NSSDCA Website

View FLOCK 4H 25, 66728 on Heavens-Above

View FLOCK 4H 25, 66728 on Keep Track

View FLOCK 4H 25, 66728 on Celestrak

View FLOCK 4H 25, 66728 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 25, 66728

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-08-26T03:53:14.647Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

FLOCK 4H 25 Visibility forecast

Co-orbital & Co-planar RSOs

Check out FLOCK 4H 25, 66728 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago