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4544 Xanthus , provisional designation 1989 FB, is an asteroid, classified as near-Earth object of the Apollo group, approximately 1.3 kilometers in diameter. It was discovered on 31 March 1989, by astronomers Henry Holt and Norman Thomas at the Palomar Observatory in California.[2]
 Orbit diagram of Xanthus as of March 2013 | |
| Discovery | |
|---|---|
| Discovered by | Henry Holt and Norman G. Thomas |
| Discovery site | Palomar Observatory |
| Discovery date | 31 March 1989 |
| Designations | |
| (4544) Xanthus | |
| Pronunciation | [1] |
| 1989 FB | |
| Near-Earth object Apollo | |
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 7629 days (20.89 yr) |
| Aphelion | 1.3023 AU (194.82 Gm) |
| Perihelion | 0.78120 AU (116.866 Gm) |
| 1.0418 AU (155.85 Gm) | |
| Eccentricity | 0.25012 |
| 1.06 yr (388.38 d) | |
| 269.26925° | |
| 0° 55m 36.923s / day | |
| Inclination | 14.146° |
| 24.00998° | |
| 333.75° | |
| Earth MOID | 0.173705 AU (25.9859 Gm) |
| Physical characteristics | |
| Dimensions | 1.3 km |
| 0.65 km | |
| 37.65 h (1.569 d) | |
| 17.1 | |
- ^ "Xanthus". Merriam-Webster.com Dictionary. Merriam-Webster.
- ^ a b "4544 Xanthus (1989 FB)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 14 April 2016.
- Benner, et al. - Radar Detection of Near-Earth Asteroids 2062 Aten, 2101 Adonis, 3103 Eger, 4544 Xanthus, and 1992 QN (1997)
- 4544 Xanthus at NeoDyS-2, Near Earth Objects—Dynamic Site
- 4544 Xanthus at ESA–space situational awareness
- 4544 Xanthus at the JPL Small-Body Database