CS1

NORAD 49261· COSPAR 2021-088B· Active satellite· Other / Unclassified· SSO

Launch

Launched on Sep 27, 2021 from Space Launch Complex 3E, United States of America aboard a Atlas V 401.

Atlas V 401 | Landsat 9 →

Live · TLE epoch 2026-09-07 21:23 UTC

Orbit class

SSO — Sun-Synchronous (LEO at 96–102° inclination)

Operator

United States Government

Country

United States

Manufacturer

—

Launched

Sep 27, 2021

Mass

—

Apogee

468 km

Perigee

451 km

Inclination

97.37°

Period

1.56 h

Altitude history

Apogee and perigee for CS1 across 14 days of archived orbital elements (15 element sets, one per day).

Trend

Stable

Change

-1.0 km

Rate

-0.07 km/day

Now

451 × 468 km

Apogee Perigee

Derived from our own archive of CelesTrak orbital elements, sampled every 3 hours. Short windows show drag and station-keeping; they are not a reentry prediction.

Launched with

3 other catalogued objects still in orbit from launch 2021-088 (Atlas V 401 | Landsat 9).

LANDSAT 9 · 49260
CS2 · 49262
CUPID · 49264

Sources & further reading

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