2025 NT561 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 35.72 AU to 58.33 AU from the Sun; one orbit takes 322.5 years.
Where is it now
- Distance from Sun
- 36.993 AU
- True anomaly
- 325.37°
- Distance from Earth
- 36.288 AU
- As of
- 24 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.
In the sky
- Right ascension
- 23h 07m 09s
- Declination
- -04° 56′ 48″
- Constellation
- Aquarius
- Distance from Earth
- 36.3 AU
- Elongation from the Sun
- 133.67° — well clear of the Sun
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.
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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
- 47.025 AU
- Eccentricity
- 0.2403
- Inclination
- 12.99°
- Orbital period
- 322.5 years
- Perihelion
- 35.723 AU
- Aphelion
- 58.328 AU
- Longitude of ascending node
- 169.83°
- Argument of periapsis
- 211.76°
- Epoch · J2000
- 2461200.5
- Orbit class · TNO
- Trans-Neptunian object
- Tisserand (Jupiter)
- 5.798
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 9).
- Observations used
- 16
- Data arc
- 59 days
- First observed
- 1 July 2025
- Last observed
- 29 August 2025
- Residual RMS
- 0.2 ″
Visual & observation
- Absolute magnitude (H)
- 7.83
Discovery & classification
Sources
- orbital elements: JPL SBDB