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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 src="https://www.satcat.com/sats-embedded/66728?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/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 (6 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: 6 hours ago

TLE from 6 hours ago

0 FLOCK 4H 25
1 66728U 25276BQ  26144.93385762  .00005097  00000-0  23725-3 0  9994
2 66728  97.4198 219.0624 0001664  79.1874 280.9549 15.20368370 26185

Epoch: 2026-05-24T22:24Z

TLE epoch observation values (Epoch: 2026-05-24T22:24:45.298Z)

Latitude

0.00003°

Longitude

0.34477°

Altitude

507.602 km

Speed

7.61 km/s

True Right ascension

14h 36m 14s

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

13:55:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

502.839 km

Perigee altitude

500.55 km

Semi-major axis

6,879.832 km

Eccentricity

0.00017

Inclination

97.4198°

RAAN

219.0624°

Arg. of periapsis

79.1874°

True anomaly

280.93618°

Mean anomaly

280.9549°

Eccentric anomaly

280.94554°

Mean motion

3.80344 °/min

Orbital period

94.65 mins

BSTAR

0.00023725

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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	2026-05-25 04:51:30.250Z	159.353° S	2026-05-25 04:54:30.250Z	78.057° E	43.588°	2026-05-25 04:57:30.250Z	353.476° N
5 mins	2026-05-25 17:56:30.250Z	4.233° NNE	2026-05-25 17:58:30.250Z	311.984° NW	43.202°	2026-05-25 18:01:30.250Z	201.098° SSW
5 mins	2026-05-26 04:34:30.250Z	129.726° SE	2026-05-26 04:36:30.250Z	66.884° ENE	32.714°	2026-05-26 04:39:30.250Z	5.113° NNE

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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: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2026-05-24T22:24:45.298Z)

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: 6 hours ago