Where is it now
- Distance from Sun
- 39.957 AU
- True anomaly
- 310.01°
- Distance from Earth
- 39.177 AU
- As of
- 19 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 47m 02s
- Declination
- -17° 31′ 37″
- Constellation
- Aquarius
- Distance from Earth
- 39.18 AU
- Elongation from the Sun
- 140.69° — well clear of the Sun
Favours the southern hemisphere; low or below the horizon from far north.
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
- 43.131 AU
- Eccentricity
- 0.105
- Inclination
- 22.56°
- Orbital period
- 283.3 years
- Perihelion
- 38.601 AU
- Aphelion
- 47.661 AU
- Longitude of ascending node
- 132.39°
- Argument of periapsis
- 270.64°
- Epoch · J2000
- 2461200.5
- Orbit class · TNO
- Trans-Neptunian object
- Earth MOID · 14,666.6 LD
- 37.6867 AU
- Tisserand (Jupiter)
- 5.409
Orbit quality
Orbit reasonably well determined (uncertainty code 3).
- Observations used
- 43
- Data arc
- 23.1 years
- First observed
- 20 July 1999
- Last observed
- 27 August 2022
- Residual RMS
- 0.45 ″
- Solution · Otto Matic
- 22 September 2022
Visual & observation
- Absolute magnitude (H)
- 7.61
Discovery & classification
- Discovered by
- Davis, D., Gladman, B., Meese, C.
- Discovery date
- 13 September 1999
- Discovery site
- Kitt Peak
Also known as 1999 RA215
Sources
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB