2021 LL57 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 35.09 AU to 62.21 AU from the Sun; one orbit takes 339.3 years.
Where is it now
- Distance from Sun
- 37.554 AU
- True anomaly
- 45.62°
- Distance from Earth
- 38.347 AU
- As of
- 26 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
- 16h 33m 04s
- Declination
- -09° 13′ 18″
- Constellation
- Ophiuchus
- Distance from Earth
- 38.35 AU
- Elongation from the Sun
- 36.46° — near the Sun — look low at dusk or dawn
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
- 48.65 AU
- Eccentricity
- 0.2787
- Inclination
- 23.89°
- Orbital period
- 339.3 years
- Perihelion
- 35.094 AU
- Aphelion
- 62.207 AU
- Longitude of ascending node
- 99.86°
- Argument of periapsis
- 101.09°
- Epoch · J2000
- 2461200.5
- Orbit class · TNO
- Trans-Neptunian object
- Tisserand (Jupiter)
- 5.477
Orbit quality
Orbit reasonably well determined (uncertainty code 4).
- Observations used
- 22
- First observed
- 2020-??-??
- Last observed
- 19 June 2023
- Residual RMS
- 0.23 ″
Visual & observation
- Absolute magnitude (H)
- 9.39
Discovery & classification
Sources
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB