Without a telescope
No brightness estimateWe have no brightness estimate for it, so we cannot say how easy it is to see.
Satellites›Amateur radio satellites›239ALFEROV (RS61S)
239ALFEROV (RS61S)
239ALFEROV (RS61S) is an amateur radio satellite from Russia (and the former Soviet Union), launched on July 25, 2025 from Vostochny, Russia. It is in a low orbit, 450 to 460 km above the ground, and goes around the Earth every 93.7 minutes: 15.4 times a day, at 7.64 km/s (27,500 km/h). The orbit is sun-synchronous: it crosses every place at about the same local time of day.
Where 239ALFEROV (RS61S) is right now
The gold ring is its orbit, and the line drops to the point on the ground under it. Inside the white circle it is above the horizon. Drag the globe to turn it, pinch or use the buttons to come closer; the target button brings you back to the satellite. The 2D map shows its path over the ground for the next lap: gold where it is in sunlight, dashed where it is in Earth’s shadow.
Finding 239ALFEROV (RS61S)…
239ALFEROV (RS61S)
Finding 239ALFEROV (RS61S)…
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- Position
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- Your time
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Can you see it?
From where
Its orbit crosses close to both poles, so sooner or later it passes over every place on Earth.
A satellite shows only when your sky is dark and it is still in sunlight: in the hours after dusk and before dawn.
When it passes over you
The app works out its passes over your exact location, alerts you before one, and leads you to it with an arrow in the camera view.
The facts
- Catalogue number (NORAD)
- 64881
- International designator
- 2025-155F
- Type
- Satellite
- Belongs to
- Russia (and the former Soviet Union)
- Launched
- July 25, 2025
- Launched from
- Vostochny, Russia
- Status
- Operational
- Orbit
- Low Earth orbit, sun-synchronous
- Lowest point
- 450 km
- Highest point
- 460 km
- Tilt to the equator
- 97.5°
- One lap
- 93.7 minutes
- Laps a day
- 15.37
- Speed
- 7.64 km/s
Orbit measured November 13, 2026, from CelesTrak. Heights are above the ground at the equator. Page updated November 14, 2026.
Quick answers
Where is 239ALFEROV (RS61S) right now?
The map on this page shows where 239ALFEROV (RS61S) is at this moment, the path it will follow over the ground for the next lap, and the part of the Earth it is above the horizon for. It is worked out from the latest tracking data.
How high is 239ALFEROV (RS61S)?
Between 450 km at its lowest and 460 km at its highest, above the ground.
How fast does 239ALFEROV (RS61S) go?
About 7.64 km/s, which is 27,500 km/h. One lap of the Earth takes it 93.7 minutes, so it goes around 15.4 times a day.
Can you see 239ALFEROV (RS61S) without a telescope?
No brightness estimate. We have no brightness estimate for it, so we cannot say how easy it is to see.
When was 239ALFEROV (RS61S) launched?
On July 25, 2025, from Vostochny, Russia.
With the app
Knowing where it is over the Earth is one thing. The app shows you where it is in your sky.
This page follows the satellite around the planet. The app works out when it passes over you, and leads you to it.
- Every pass over your exact location, for this satellite and 10,000+ more.
- An alert before it rises, so you are outside in time.
- An arrow in the camera view that leads you to the exact spot in the sky.
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