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Trans-Neptunian object

2025 RY11

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(2025 RY11)

Where is it now

Distance from Sun
12.052 AU
True anomaly
267.74°
Distance from Earth
11.067 AU
As of
15 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Sun Earth — 0.997 AU from the Sun Earth 2025 RY11 — 12.052 AU from the Sun 2025 RY11
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 RY11 is 11.067 AU from Earth today (1.5 light-hours).

In the sky

Right ascension
00h 53m 24s
Declination
+14° 47′ 46″
Constellation
Pisces
Distance from Earth
11.07 AU
Elongation from the Sun
170.34° — near opposition — up most of the night

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
34.817 AU
Eccentricity
0.8155
Inclination
16.78°
Orbital period
205.4 years
Perihelion
6.425 AU
Aphelion
63.209 AU
Longitude of ascending node
225.01°
Argument of periapsis
244.67°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 2,133.3 LD
5.4815 AU
Tisserand (Jupiter)
3.017

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
47
Data arc
8.02 years
First observed
20 September 2017
Last observed
29 September 2025
Residual RMS
0.68 ″
Solution · Otto Matic
1 October 2025

Visual & observation

Absolute magnitude (H)
10.87

Discovery & classification

TNO

Close approaches 1 on record

When (UTC) Body Distance Lunar distances Relative speed
2028-11-16 06:07:00 Satrn 0.8057 AU 313.6 LD 7.7 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources