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BB 1, 56171

Orbit data source: Space-Track

BB 1, 56171 is a payload satellite owned by SDA (US) in LEO that was launched on Sun, 02 Apr 2023 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/56171?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/56171?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

56171, 2023-050K

Orbit

LEO

Country

Related business

Space Development Agency (US)

Manufacturer

SPX/LEIDOS

Mission

Operational Defense Early Warn

Bus & Motor

STARSHIELD?, Unknown motor

Mass

~800 kg wet, ~800 kg dry

Launch date (UTC)

2023-04-02 (3 years ago)

Launch vehicle

FALCON 9

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 1 Pan, 4.5 m

Radar Cross Section

12.397 m², Large (>1 m²)

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

TLE from 6 days ago

0 BB 1
1 56171U 23050K   26167.05370410  .00000072  00000-0  54190-4 0  9994
2 56171  81.0038  81.7178 0014793 312.0925  47.8972 13.84458346161382

Epoch: 2026-06-16T01:17Z

TLE epoch observation values (Epoch: 2026-06-16T01:17:20.034Z)

Latitude

-0.00002°

Longitude

158.05307°

Altitude

943.714 km

Speed

7.384 km/s

True Right ascension

05h 26m 52s

True Declination

0° 00' 00"

Sunlit

Object was in daylight 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

21:47:23

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

956.17 km

Perigee altitude

934.502 km

Semi-major axis

7,323.473 km

Eccentricity

0.00148

Inclination

81.0038°

RAAN

81.7178°

Arg. of periapsis

312.0925°

True anomaly

48.02313°

Mean anomaly

47.8972°

Eccentric anomaly

47.96015°

Mean motion

3.46312 °/min

Orbital period

103.95 mins

BSTAR

0.00005419

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Other satellites on launch #50 in the year 2023 (2023-04-02 UTC)

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BB 1 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.
7 mins	2026-06-22 16:59:20.110Z	123.882° SE	2026-06-22 17:03:20.110Z	82.131° E	16.852°	2026-06-22 17:06:20.110Z	50.284° ENE
10 mins	2026-06-22 18:43:20.110Z	205.127° SW	2026-06-22 18:47:20.110Z	272.178° WNW	41.781°	2026-06-22 18:53:20.110Z	2.89° NNE
6 mins	2026-06-23 03:52:20.110Z	36.67° NE	2026-06-23 03:55:20.110Z	70.971° E	17.18°	2026-06-23 03:58:20.110Z	102.683° ESE
10 mins	2026-06-23 05:36:20.110Z	341.216° N	2026-06-23 05:40:20.110Z	275.844° WNW	42.51°	2026-06-23 05:46:20.110Z	183.552° SSW

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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 BB 1, 56171 on other resources

View BB 1, 56171 on NASA - NSSDCA Website

View BB 1, 56171 on Heavens-Above

View BB 1, 56171 on Keep Track

View BB 1, 56171 on Celestrak

View BB 1, 56171 on Gunter's Space Page

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

BB 1, 56171

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 6 days ago

TLE from 6 days ago

TLE epoch observation values (Epoch: 2026-06-16T01:17:20.034Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #50 in the year 2023 (2023-04-02 UTC)

BB 1 Visibility forecast

Co-orbital & Co-planar RSOs

Check out BB 1, 56171 on other resources

Documentation

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