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GRACE-FO 1, 43476

Orbit data source: Space-Track

GRACE-FO 1, 43476 is an American payload satellite in LEO that was launched on Tue, 22 May 2018 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/43476?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/43476?theme=dark&initialShowStats=false

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Identifier

43476, 2018-047A

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

ADS/Bremen

Mission

Operational Civil Science

Bus & Motor

FLEXBUS, N2 AOCS

Mass

600 kg wet, ~500 kg dry

Launch date (UTC)

2018-05-22 (8 years ago)

Launch vehicle

FALCON 9

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Half Hex Poly, 1.9 m

Radar Cross Section

5.603 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 9 hours ago

TLE from 9 hours ago

0 GRACE-FO 1
1 43476U 18047A   26091.18790457  .00005339  00000-0  14314-3 0  9999
2 43476  88.9939 208.5208 0013261  59.8439 300.4128 15.37690608437960

Epoch: 2026-04-01T04:30Z

TLE epoch observation values (Epoch: 2026-04-01T04:30:34.954Z)

Latitude

-0.00005°

Longitude

-48.67917°

Altitude

451.582 km

Speed

7.644 km/s

True Right ascension

13h 54m 04s

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

19:39:27

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

458.779 km

Perigee altitude

440.671 km

Semi-major axis

6,827.862 km

Eccentricity

0.00133

Inclination

88.9939°

RAAN

208.5208°

Arg. of periapsis

59.8439°

True anomaly

300.28164°

Mean anomaly

300.4128°

Eccentric anomaly

300.34723°

Mean motion

3.84695 °/min

Orbital period

93.58 mins

BSTAR

0.00014314

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Other satellites on launch #47 in the year 2018 (2018-05-22 UTC)

IRIDIUM 110, 43481

GRACE-FO 2, 43477

FALCON 9 DEB, 43483 (Decayed)

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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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GRACE-FO 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.
4 mins	2026-04-01 20:42:08.803Z	323.679° NNW	2026-04-01 20:44:08.803Z	270.136° WNW	24.838°	2026-04-01 20:46:08.803Z	224.562° SW
4 mins	2026-04-02 08:46:08.803Z	228.938° WSW	2026-04-02 08:48:08.803Z	286.269° WNW	24.626°	2026-04-02 08:50:08.803Z	329.331° NNW

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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 GRACE-FO 1, 43476 on other resources

View GRACE-FO 1, 43476 on NASA - NSSDCA Website

View GRACE-FO 1, 43476 on Heavens-Above

View GRACE-FO 1, 43476 on Keep Track

View GRACE-FO 1, 43476 on Celestrak

View GRACE-FO 1, 43476 on Gunter's Space Page

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

GRACE-FO 1, 43476

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-04-01T04:30:34.954Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #47 in the year 2018 (2018-05-22 UTC)

GRACE-FO 1 Visibility forecast

Co-orbital & Co-planar RSOs

Check out GRACE-FO 1, 43476 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago