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UMKA 1 (RS40S) (NORAD 57172)

UMKA 1 (RS40S) is an amateur radio satellite (NORAD 57172) in a LEO orbit 491 by 508 km above the Earth, circling the planet every 94.6 minutes. Right now it is over latitude 66.1°, longitude -149.2° at an altitude of 512 km.

Live position and ground track (past 45 min, next 100 min)

Where is UMKA 1 (RS40S) now?

Latitude: 66.103°
Longitude: -149.169°
Altitude: 512.4 km
Speed: 7.613 km/s
Footprint radius: 2475 km

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Frequencies and modes

Link	Uplink	Downlink	Mode
Mode U - GMSK 9k6 (USP) TLM	—	437.625 MHz	GMSK USP
Mode S - BPSK 2Mbps TLM	—	2402.4 MHz	BPSK
Mode U - SSTV	—	437.625 MHz	SSTV
Mode U - GMSK 4k8 (USP) TLM	—	437.625 MHz	GMSK USP
Mode U - CW	—	437.625 MHz	CW

Frequencies are the nominal values from the SatNOGS database and can change. While the satellite is above your horizon the table shows the Doppler-corrected frequencies. For how to use them, read working amateur radio satellites.

Orbit and identity

57172NORAD catalog number

2023-091GInternational designator

Amateur radioCategory

LEOOrbit class

94.61 minOrbital period

491 × 508 kmPerigee × apogee altitude

97.49°Inclination

0.001255Eccentricity

15.2209Revolutions per day

2023Launch year

In orbitStatus (SatNOGS)

NoneOperator

Orbital elements epoch: 2026-10-29T22:01:48 UTC (23 hours ago). Positions drift from reality as the elements age; fresh elements are fetched automatically.

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Positions are computed from public orbital elements (CelesTrak / US Space Force 18th SDS) with the SGP4 model and are accurate to a few kilometres; amateur radio data from the SatNOGS DB (CC BY-SA). Not for navigation or safety-critical use. Method and limits · Radio coverage map · Live HF propagation data