LowEarth

HERMES-4

NORAD 63833· COSPAR 2025-052BP· Active satellite· Other / Unclassified· SSO
Launch
Launched on Mar 15, 2025 from Space Launch Complex 4E, United States of America aboard a Falcon 9 Block 5.
Falcon 9 Block 5 | Transporter 13 (Dedicated SSO Rideshare)
Live · TLE epoch 2026-09-08 14:44 UTC
Orbit class
SSO — Sun-Synchronous (LEO at 96–102° inclination)
Operator
ASI
Country
Italy
Manufacturer
Launched
Mar 15, 2025
Mass
Apogee
474 km
Perigee
474 km
Inclination
97.38°
Period
1.57 h

Altitude history

Apogee and perigee for HERMES-4 across 14 days of archived orbital elements (15 element sets, one per day).

Trend
Stable
Change
-0.7 km
Rate
-0.05 km/day
Now
474 × 474 km
475476473Aug 26Sep 9
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

57 other catalogued objects still in orbit from launch 2025-052 (Falcon 9 Block 5 | Transporter 13 (Dedicated SSO Rideshare)).

…and 33 more from this launch.

Sources & further reading

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