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FLOCK 4H 26, 66729

Orbit data source: Space-Track

FLOCK 4H 26, 66729 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/66729?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/66729?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

66729, 2025-276BR

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 (7 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: 6 hours ago

TLE from 6 hours ago

0 FLOCK 4H 26
1 66729U 25276BR  26193.13171625  .00004001  00000-0  18957-3 0  9997
2 66729  97.4189 266.1334 0003223 281.9852  78.1021 15.19878396 34205

Epoch: 2026-07-12T03:09Z

TLE epoch observation values (Epoch: 2026-07-12T03:09:40.283Z)

Latitude

-0.00012°

Longitude

-71.31941°

Altitude

508.841 km

Speed

7.61 km/s

True Right ascension

17h 44m 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

21:07:42

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

505.392 km

Perigee altitude

500.956 km

Semi-major axis

6,881.311 km

Eccentricity

0.00032

Inclination

97.4189°

RAAN

266.1334°

Arg. of periapsis

281.9852°

True anomaly

78.13824°

Mean anomaly

78.1021°

Eccentric anomaly

78.12017°

Mean motion

3.80221 °/min

Orbital period

94.68 mins

BSTAR

0.00018957

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

LEMUR-2-HOTSPUR-TOM, 66786

PELICAN-6 300D, 66703

IRIDE FM5, 66699

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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 26 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.
7 mins	2026-07-12 17:56:07.162Z	5.682° NNE	2026-07-12 17:59:07.162Z	327.124° NNW	40.572°	2026-07-12 18:03:07.162Z	202.134° SSW
5 mins	2026-07-13 04:35:07.162Z	138.126° SSE	2026-07-13 04:37:07.162Z	88.877° E	34.236°	2026-07-13 04:40:07.162Z	6.248° 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 26, 66729 on other resources

View FLOCK 4H 26, 66729 on NASA - NSSDCA Website

View FLOCK 4H 26, 66729 on Heavens-Above

View FLOCK 4H 26, 66729 on Keep Track

View FLOCK 4H 26, 66729 on Celestrak

View FLOCK 4H 26, 66729 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 26, 66729

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: 2026-07-12T03:09:40.283Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

FLOCK 4H 26 Visibility forecast

Co-orbital & Co-planar RSOs

Check out FLOCK 4H 26, 66729 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 6 hours ago