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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

Last TLE update

1 day ago

Origin

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 (2 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

TLE from 1 day ago

0 BB 1
1 56171U 23050K   25213.47177062  .00000087  00000-0  73502-4 0  9993
2 56171  81.0023  25.3273 0015945  80.1452 280.1500 13.79331666117406

Epoch: 2025-08-01T11:19Z

TLE epoch observation values (Epoch: 2025-08-01T11:19:20.981Z)

Latitude

-0.00006°

Longitude

-94.83194°

Altitude

967.062 km

Speed

7.369 km/s

True Right ascension

01h 41m 18s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

27.00161°

Longitude

79.50172°

Altitude

966.549 km

Speed

7.372 km/s

Apparent Right ascension

14h 25m 20s

Apparent Declination

-3° 59' 35"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

03:55:33

Azimuth

35.432° NE

Elevation

-48.702°

Doppler factor

Orbital elements

Apogee altitude

975.191 km

Perigee altitude

951.779 km

Semi-major axis

7,341.622 km

Eccentricity

0.00159

Inclination

81.0023°

RAAN

25.3273°

Arg. of periapsis

80.1452°

True anomaly

279.97008°

Mean anomaly

280.15°

Eccentric anomaly

280.06005°

Mean motion

3.45029 °/min

Orbital period

104.34 mins

BSTAR

0.000073502

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

BB 1 Visibility forecast

Observer location: undefined°, undefined°

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.
11 mins	2025-08-02 22:43:19.719Z	2.83° NNE	2025-08-02 22:48:19.719Z	72.047° E	38.269°	2025-08-02 22:54:19.719Z	152.221° SSE
7 mins	2025-08-03 00:30:19.719Z	310.242° NW	2025-08-03 00:33:19.719Z	274.744° WNW	20.452°	2025-08-03 00:37:19.719Z	230.009° WSW
10 mins	2025-08-03 12:11:19.719Z	188.544° SSW	2025-08-03 12:15:19.719Z	193.452° SSW	44.391°	2025-08-03 12:21:19.719Z	9.344° NNE

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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Authenticating...

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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.