- Earth-watching satellite
- NORAD 66315
- 2025-251A
- Low Earth orbit
Current orbit
View on live mapOrbit began over the Arctic Ocean
Orbit ends over the Arctic Ocean
In view from you
Nobody watches Sentinel-1D go over, but a receiver still asks whether it is above the horizon. Say where you are and this card answers.
Your position is rounded to about a kilometre and sent only to the Orbinauts API, to find the pass.
No brightness has been published for Sentinel-1D, so it is not a naked-eye satellite and no city page carries pass times for it. Nothing here estimates one.
Seeing it
There is nothing to go outside for: it is too faint for the naked eye. What it is up there for reaches the ground as pictures and measurements, not as a light in the sky.
Altitude
One reading a day, worked out from the elements Space-Track publishes.
Timeline
- Launch
Launched on Ariane 6 from Kourou. Source
Summary
Over the Indian Ocean LIVE
Where is Sentinel-1D?
At 3:03:49 AM UTC Sentinel-1D was over the Indian Ocean (3.4° S, 43.7° E), 699 km up, moving at 7.51 km/s and in sunlight.
What is Sentinel-1D?
A satellite that watches the Earth in low Earth orbit, in space since Nov 4, 2025.
Can I see Sentinel-1D?
No, not with the naked eye: no brightness has been published for Sentinel-1D, and nothing here estimates one; what people use is its pictures and measurements of the Earth.
General
- Launched
- Rocket
- Ariane 6
- Watches
- The Earth’s surface by radar, day and night and through cloud: sea ice, oil spills, floods and the slow movements of the ground
- Full picture of the Earth
- Every 12 days on its own, or every 6 together with Sentinel-1C
- Operator
- ESA, which flies it for the European Union’s Copernicus programme
- Mass
- about 2.2 t
- Typical altitude
- 695 to 697 km
- Speed
- about 7.51 km/s (27,000 km/h)
Latest orbital data
- Position received
- 3:03 AM UTC
- Station time (UTC)
- 3:03 AM UTC
- Latitude / longitude
- 3.4° S, 43.7° E
- Altitude
- 699 km
- Speed
- 7.51 km/s (27,022 km/h)
- Course
- south
- Light
- In sunlight
- Inclination
- 98.2°
- Orbital period
- 98.7 minutes
- Orbits per day
- 14.59
- This orbit
- 692 to 694 km
- In shadow
- None of this orbit
- In view from
- Within 1,940 km of the point below it
- Elements epoch
- Nov 2, 2026, 5:59 PM, 9 hours old
- Source
- Position from Space-Track orbital elements of Nov 2, 2026, 5:59 PM, 9 hours old.
No operator publishes an ephemeris for Sentinel-1D, so every position here comes from its orbital elements.
In orbit
- Close approaches
- No close approach to Sentinel-1D has been reported publicly in the past thirty days.
- Losing to drag
- Sentinel-1D is falling less than a metre a day, read from the last 48 days of samples.
From Space-Track’s public conjunction messages; the latest report was issued Nov 2, 2026, 1:53 PM, 13 hours old. Only approaches serious enough to be reported publicly are listed: within three days and, for two bodies near the Earth, closer than a kilometre with a chance of a collision above 1 in 10,000, the level at which NASA moves the ISS.
The Copernicus Sentinel-1 programme
Orbinauts also tracks:
Data and API
The current elements from Space-Track as an OMM object, epoch Nov 2, 2026, 5:59 PM, 9 hours old.
{
"OBJECT_NAME": "SENTINEL-1D",
"OBJECT_ID": "2025-251A",
"EPOCH": "2026-11-02T17:59:53.060352",
"MEAN_MOTION": 14.59198529,
"ECCENTRICITY": 0.0001281,
"INCLINATION": 98.1822,
"RA_OF_ASC_NODE": 312.1396,
"ARG_OF_PERICENTER": 89.5237,
"MEAN_ANOMALY": 270.611,
"EPHEMERIS_TYPE": 0,
"CLASSIFICATION_TYPE": "U",
"NORAD_CAT_ID": 66315,
"ELEMENT_SET_NO": 999,
"REV_AT_EPOCH": 5293,
"BSTAR": 0.000027664,
"MEAN_MOTION_DOT": 8.5e-7,
"MEAN_MOTION_DDOT": 0
}