| Minorplanet: | yes |
| Background: |
|
| Discovered: | 15 December 1998 |
| Mpc Name: | (21601) |
| Epoch: | 23 March 2018 (JD 2458200.5) |
| Uncertainty: | 0 |
| Observation Arc: | 26.70 yr (9,751 d) |
| Perihelion: | 5.0346 AU |
| Semimajor: | 5.2197 AU |
| Eccentricity: | 0.0355 |
| Period: | 11.93 yr (4,356 d) |
| Mean Motion: | / day |
| Inclination: | 19.472° |
| Asc Node: | 263.64° |
| Arg Peri: | 213.23° |
| Jupiter Moid: | 0.0528 AU |
| Tisserand: | 2.8840 |
| Mean Diameter: | |
| Abs Magnitude: | 9.40 9.9 10.0 |
(provisional designation ) is a Jupiter trojan from the Greek camp, approximately 55km (34miles) in diameter. It was discovered on 15 December 1998, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Lab's ETS near Socorro, New Mexico. The dark Jovian asteroid has a rotation period of 12.7 hours and belongs to the 80 largest Jupiter trojans. It has not been named since its numbering in February 2001.
is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance . It is also a non-family asteroid in the Jovian background population.
It orbits the Sun at a distance of 5.0–5.4 AU once every 11 years and 11 months (4,356 days; semi-major axis of 5.22 AU). Its orbit has an eccentricity of 0.04 and an inclination of 19° with respect to the ecliptic. The body's observation arc begins with a precovery published by the Digitized Sky Survey and taken at the Siding Spring Observatory in March 1991, more than 7 years prior to its official discovery observation at Socorro.
This minor planet was numbered on 8 February 2001 ., it has not been named.
is an assumed C-type asteroid. Its V–I color index of 0.97 is typical for that of D-type asteroids, the dominant spectral type among the Jupiter trojans.
In April 2013, a rotational lightcurve of was obtained from photometric observations by Robert Stephens at the Center for Solar System Studies (CS3) in California. Lightcurve analysis gave a rotation period of hours and a brightness variation of 0.30 magnitude . Observations by his college Brian Warner at CS3 in July 2017, gave a similar period of 12.530 hours with an amplitude of 0.25 magnitude .
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, measures 54.91 and 56.08 kilometers in diameter and its surface has an albedo of 0.064 and 0.100, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 55.67 kilometers based on an absolute magnitude of 10.0.