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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 (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: 13 hours ago

TLE from 13 hours ago

0 FLOCK 4H 26
1 66729U 25276BR  26141.17604561  .00003975  00000-0  19176-3 0  9997
2 66729  97.4192 215.0680 0006568 103.3988 256.7979 15.19242621 26313

Epoch: 2026-05-21T04:13Z

TLE epoch observation values (Epoch: 2026-05-21T04:13:30.340Z)

Latitude

-0.00006°

Longitude

-87.13342°

Altitude

512.253 km

Speed

7.607 km/s

True Right ascension

14h 20m 16s

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

02:08:15

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

509.617 km

Perigee altitude

500.575 km

Semi-major axis

6,883.233 km

Eccentricity

0.00066

Inclination

97.4192°

RAAN

215.068°

Arg. of periapsis

103.3988°

True anomaly

256.72464°

Mean anomaly

256.7979°

Eccentric anomaly

256.76127°

Mean motion

3.80062 °/min

Orbital period

94.72 mins

BSTAR

0.00019176

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

FLOCK 4H 30, 66733

NUSAT-51 (YVONNE BRILL), 66740

LEMUR-2-CELIJO-SB-PK, 66781

LEMUR-2-STARLIGHT, 66783

OBJECT AB, 66691

MERCURY ONE (M1), 66742

AC1-002, 66745

IRIDE FM6, 66700

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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.
6 mins	2026-05-21 17:26:18.011Z	28.404° NE	2026-05-21 17:29:18.011Z	104.712° ESE	35.334°	2026-05-21 17:32:18.011Z	171.137° S
5 mins	2026-05-22 05:39:18.011Z	219.358° SW	2026-05-22 05:41:18.011Z	264.796° W	23.253°	2026-05-22 05:44:18.011Z	320.921° NNW

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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: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-05-21T04:13:30.340Z)

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: 13 hours ago