OBJECT AB, 66691

Orbit data source: Space-Track

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Recently launched and/or uncataloged RSOs may have evolving metadata. Metadata may include the following, but is not limited to: Owner, Manufacturer, Bus, Motor, and Mission.

OBJECT AB, 66691 is a satellite 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). Unknown objects in Earth's orbit typically refer to objects detected orbiting the Earth but have not yet been identified or cataloged. These objects could be anything from previously untracked satellites, spent rocket stages, debris from satellite collisions, or even natural meteoroids temporarily captured by Earth's gravity.

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<iframe src="https://www.satcat.com/sats-embedded/66691?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/66691?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

66691, 2025-276AB

Orbit

SSO

Country

TBD

Related business

None

Manufacturer

Unknown

Mission

Operational Amateur Science

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

2025-11-28 (9 months ago)

Launch vehicle

FALCON 9

Launch site

Air Force Western Test Range (AFWTR)

Object type

Unknown

Shape & HBR

Box, 0.2 m

Radar Cross Section

0.080 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 OBJECT AB
1 66691U 25276AB  26239.17545080  .00008428  00000-0  37235-3 0  9997
2 66691  97.4156 311.8429 0006157 106.9777 253.2135 15.21955216 41223

Epoch: 2026-08-27T04:12Z

TLE epoch observation values (Epoch: 2026-08-27T04:12:38.949Z)

Latitude

0.00006°

Longitude

-86.73726°

Altitude

504.262 km

Speed

7.611 km/s

True Right ascension

20h 47m 22s

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

02:02:00

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

501.14 km

Perigee altitude

492.674 km

Semi-major axis

6,875.044 km

Eccentricity

0.00062

Inclination

97.4156°

RAAN

311.8429°

Arg. of periapsis

106.9777°

True anomaly

253.14597°

Mean anomaly

253.2135°

Eccentric anomaly

253.17973°

Mean motion

3.80741 °/min

Orbital period

94.55 mins

BSTAR

0.00037235

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

FGN-TUG-S01, 100399

FOSSASAT2E22, 66779

LEMUR-2-FINNIAN, 66782

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OBJECT AB 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	2026-08-27 17:23:45.314Z	28.426° NE	2026-08-27 17:26:45.314Z	89.425° E	32.939°	2026-08-27 17:29:45.314Z	166.219° S
5 mins	2026-08-28 05:35:45.314Z	215.595° SW	2026-08-28 05:37:45.314Z	264.586° W	25.368°	2026-08-28 05:40:45.314Z	323.286° NNW

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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 OBJECT AB, 66691 on other resources

View OBJECT AB, 66691 on Heavens-Above

View OBJECT AB, 66691 on Keep Track

View OBJECT AB, 66691 on Celestrak

View OBJECT AB, 66691 on Gunter's Space Page

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

OBJECT AB, 66691

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: 2026-08-27T04:12:38.949Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

OBJECT AB Visibility forecast

Co-orbital & Co-planar RSOs

Check out OBJECT AB, 66691 on other resources

Documentation

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