2026 HQ18 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 40.46 AU to 56.56 AU from the Sun; one orbit takes 337.9 years.
Where is it now
- Distance from Sun
- 40.501 AU
- True anomaly
- 7.21°
- Distance from Earth
- 41.465 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
- 15h 01m 25s
- Declination
- -11° 51′ 17″
- Constellation
- Libra
- Distance from Earth
- 41.47 AU
- Elongation from the Sun
- 13.8° — too close to the Sun to observe
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
- 48.51 AU
- Eccentricity
- 0.166
- Inclination
- 5.53°
- Orbital period
- 337.9 years
- Perihelion
- 40.456 AU
- Aphelion
- 56.563 AU
- Longitude of ascending node
- 116.58°
- Argument of periapsis
- 102.77°
- Epoch · J2000
- 2461200.5
- Orbit class · TNO
- Trans-Neptunian object
- Tisserand (Jupiter)
- 6.101
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 9).
- Observations used
- 24
- Data arc
- 33 days
- First observed
- 19 April 2026
- Last observed
- 22 May 2026
- Residual RMS
- 0.12 ″
Visual & observation
- Absolute magnitude (H)
- 7.9
Discovery & classification
Sources
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB