2026 GM21 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 31.71 AU to 62.9 AU from the Sun; one orbit takes 325.4 years.
Where is it now
- Distance from Sun
- 36.528 AU
- True anomaly
- 62.08°
- Distance from Earth
- 37.227 AU
- As of
- 25 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
- 10h 56m 53s
- Declination
- -12° 28′ 31″
- Constellation
- Crater
- Distance from Earth
- 37.23 AU
- Elongation from the Sun
- 44.83° — 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
- 47.306 AU
- Eccentricity
- 0.3296
- Inclination
- 18.33°
- Orbital period
- 325.4 years
- Perihelion
- 31.712 AU
- Aphelion
- 62.9 AU
- Longitude of ascending node
- 248.69°
- Argument of periapsis
- 218.07°
- Epoch · J2000
- 2461200.5
- Orbit class · TNO
- Trans-Neptunian object
- Tisserand (Jupiter)
- 5.514
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 8).
- Observations used
- 13
- Data arc
- 55 days
- First observed
- 13 April 2026
- Last observed
- 7 June 2026
- Residual RMS
- 0.13 ″
Visual & observation
- Absolute magnitude (H)
- 7.17
Discovery & classification
Sources
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB