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FLOCK 4H 35, 66738

Orbit data source: Space-Track

FLOCK 4H 35, 66738 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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https://www.satcat.com/sats-embedded/66738?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

66738, 2025-276CA

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: 12 hours ago

TLE from 12 hours ago

0 FLOCK 4H 35
1 66738U 25276CA  26141.18129340  .00003794  00000-0  17764-3 0  9995
2 66738  97.4197 215.3816 0002782  59.7413 300.4097 15.20327834 25626

Epoch: 2026-05-21T04:21Z

TLE epoch observation values (Epoch: 2026-05-21T04:21:03.749Z)

Latitude

-0.00008°

Longitude

-88.71419°

Altitude

506.972 km

Speed

7.611 km/s

True Right ascension

14h 21m 31s

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

01:44:44

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

503.731 km

Perigee altitude

499.903 km

Semi-major axis

6,879.954 km

Eccentricity

0.00028

Inclination

97.4197°

RAAN

215.3816°

Arg. of periapsis

59.7413°

True anomaly

300.3822°

Mean anomaly

300.4097°

Eccentric anomaly

300.39595°

Mean motion

3.80334 °/min

Orbital period

94.65 mins

BSTAR

0.00017764

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

FLOCK 4H 6, 66709

IRIDE FM3, 66697

LILIUM-3, 66770

LEMUR-2-TEODOR, 66768

PELICAN-5 300C, 66667

LEMUR-2-VUKASIN, 66785

HYDROGNSS-1, 66762

HYDROGNSS-2, 66763

LILIUM-2, 66679

NUSAT-51 (YVONNE BRILL), 66740

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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 35 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 17:32:51.235Z	22.382° NNE	2026-05-21 17:35:51.235Z	78.568° E	38.449°	2026-05-21 17:38:51.235Z	174.759° S
4 mins	2026-05-22 05:45:51.235Z	225.332° WSW	2026-05-22 05:47:51.235Z	268.414° W	20.461°	2026-05-22 05:49:51.235Z	308.39° NW

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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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Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out FLOCK 4H 35, 66738 on other resources

View FLOCK 4H 35, 66738 on NASA - NSSDCA Website

View FLOCK 4H 35, 66738 on Heavens-Above

View FLOCK 4H 35, 66738 on Keep Track

View FLOCK 4H 35, 66738 on Celestrak

View FLOCK 4H 35, 66738 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 35, 66738

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-05-21T04:21:03.749Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

FLOCK 4H 35 Visibility forecast

Co-orbital & Co-planar RSOs

Check out FLOCK 4H 35, 66738 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 12 hours ago