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UMBRA-11, 66748

Orbit data source: Space-Track

UMBRA-11, 66748 is a payload satellite owned by Umbra Labs (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/66748?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/66748?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

66748, 2025-276CL

Orbit

SSO

Country

Related business

Umbra Labs (US)

Manufacturer

Umbra Labs

Mission

Operational Commercial Radar Imaging

Bus & Motor

ESPASAT?, Unknown motor

Mass

84 kg wet, 79 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 Dish, 2.0 m

Radar Cross Section

6.513 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 UMBRA-11
1 66748U 25276CL  26192.76158477  .00012884  00000-0  47853-3 0  9991
2 66748  97.4200 267.2537 0002264 195.0308 165.0864 15.27688632 34248

Epoch: 2026-07-11T18:16Z

TLE epoch observation values (Epoch: 2026-07-11T18:16:40.924Z)

Latitude

-0.00003°

Longitude

63.41303°

Altitude

487.326 km

Speed

7.621 km/s

True Right ascension

17h 49m 00s

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

14:28:54

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

481.233 km

Perigee altitude

478.127 km

Semi-major axis

6,857.817 km

Eccentricity

0.00023

Inclination

97.42°

RAAN

267.2537°

Arg. of periapsis

195.0308°

True anomaly

165.09308°

Mean anomaly

165.0864°

Eccentric anomaly

165.08974°

Mean motion

3.82177 °/min

Orbital period

94.2 mins

BSTAR

0.00047853

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

AE5RA, 66685

LEMUR-2-STAS-GORBUK, 66686

LEMUR-2-FINNIAN, 66782

LEMUR-2-TARTIFLETTE, 66784

YAM-9, 66694

NAHLA, 66764

IMPULSE-3 MIRA, 66687

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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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UMBRA-11 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.
5 mins	2026-07-12 05:25:24.189Z	200.146° SSW	2026-07-12 05:27:24.189Z	268.675° W	34.583°	2026-07-12 05:30:24.189Z	333.071° NNW
4 mins	2026-07-12 18:26:24.189Z	326.173° NNW	2026-07-12 18:27:24.189Z	296.178° NW	27.69°	2026-07-12 18:30:24.189Z	226.841° WSW

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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 UMBRA-11, 66748 on other resources

View UMBRA-11, 66748 on NASA - NSSDCA Website

View UMBRA-11, 66748 on Heavens-Above

View UMBRA-11, 66748 on Keep Track

View UMBRA-11, 66748 on Celestrak

View UMBRA-11, 66748 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

UMBRA-11, 66748

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-07-11T18:16:40.924Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

UMBRA-11 Visibility forecast

Co-orbital & Co-planar RSOs

Check out UMBRA-11, 66748 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago