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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 (4 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

Expand to show TLE details & history
Last TLE update: 13 hours ago

TLE from 13 hours ago

0 UMBRA-11
1 66748U 25276CL  26092.21202148  .00034911  00000-0  14610-2 0  9994
2 66748  97.4243 167.4885 0002122 198.9938 161.1220 15.23481764 18918

Epoch: 2026-04-02T05:05Z

TLE epoch observation values (Epoch: 2026-04-02T05:05:18.655Z)

Latitude

-0.00006°

Longitude

-99.40297°

Altitude

499.823 km

Speed

7.614 km/s

True Right ascension

11h 09m 57s

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

23:29:23

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

493.768 km

Perigee altitude

490.852 km

Semi-major axis

6,870.447 km

Eccentricity

0.00021

Inclination

97.4243°

RAAN

167.4885°

Arg. of periapsis

198.9938°

True anomaly

161.12987°

Mean anomaly

161.122°

Eccentric anomaly

161.12593°

Mean motion

3.81123 °/min

Orbital period

94.46 mins

BSTAR

0.001461

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

W-SERIES 5, 66747 (Decayed)

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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.
6 mins	2026-04-02 18:15:31.709Z	352.504° N	2026-04-02 18:18:31.709Z	276.12° WNW	32.35°	2026-04-02 18:21:31.709Z	217.505° SW
5 mins	2026-04-03 04:52:31.709Z	154.714° SSE	2026-04-03 04:54:31.709Z	93.061° ESE	42.779°	2026-04-03 04:57:31.709Z	354.84° N

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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: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-04-02T05:05:18.655Z)

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: 13 hours ago