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CS1, 49261

Orbit data source: Space-Track

CS1, 49261 is a payload satellite owned by Cesium (US) in SSO that was launched on Mon, 27 Sep 2021 UTC via an ATLAS V 401 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 URL

https://www.satcat.com/sats-embedded/49261?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

49261, 2021-088B

Orbit

SSO

Last TLE update

14 hours ago

Origin

Cesium Astro, Inc. (US)

Manufacturer

Cesium

Mission

Operational Commercial Technology

Bus & Motor

CUBESAT 6U, Unknown motor

Mass

~10 kg wet, 10 kg dry

Launch date (UTC)

2021-09-27 (4 years ago)

Launch vehicle

ATLAS V 401

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 3 Pan, 0.5 m

Radar Cross Section

0.150 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 14 hours ago

0 CS1
1 49261U 21088B   25214.16150023  .00011167  00000-0  45648-3 0  9999
2 49261  97.4253 273.9212 0016660 129.3025 230.9693 15.24399914211655

Epoch: 2025-08-02T03:52Z

TLE epoch observation values (Epoch: 2025-08-02T03:52:33.619Z)

Latitude

-0.00003°

Longitude

-95.22052°

Altitude

502.905 km

Speed

7.609 km/s

True Right ascension

18h 15m 41s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

60.39821°

Longitude

-107.81138°

Altitude

498.206 km

Speed

7.624 km/s

Apparent Right ascension

19h 00m 14s

Apparent Declination

13° 33' 06"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

08:05:12

Azimuth

19.25° NNE

Elevation

-34.438°

Doppler factor

Orbital elements

Apogee altitude

500.99 km

Perigee altitude

478.107 km

Semi-major axis

6,867.686 km

Eccentricity

0.00167

Inclination

97.4253°

RAAN

273.9212°

Arg. of periapsis

129.3025°

True anomaly

230.82119°

Mean anomaly

230.9693°

Eccentric anomaly

230.89523°

Mean motion

3.81353 °/min

Orbital period

94.4 mins

BSTAR

0.00045648

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Other satellites on launch #88 in the year 2021 (2021-09-27 UTC)

CS1 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.
6 mins	2025-08-03 03:38:18.311Z	140.385° SSE	2025-08-03 03:41:18.311Z	73.269° E	32.047°	2025-08-03 03:44:18.311Z	6.323° NNE
5 mins	2025-08-03 16:41:18.311Z	28.626° NE	2025-08-03 16:43:18.311Z	99.502° ESE	39.824°	2025-08-03 16:46:18.311Z	178.072° S

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 CS1, 49261 on other resources

View CS1, 49261 on NASA - NSSDCA Website

View CS1, 49261 on Heavens-Above

View CS1, 49261 on Keep Track

View CS1, 49261 on Celestrak

View CS1, 49261 on Gunter's Space Page

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