1999 XS35
Near-Earth asteroid
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1999 XS35 is a near-Earth object discovered in 1999 having a comet-like orbit. Its semi-major axis is 17.8 AU. Its orbital eccentricity is 0.94, which means that at the perihelion 1999 XS35 comes as close as 0.9 AU to the Sun, while at the aphelion it reaches beyond the orbit of Neptune.[2] 1999 XS35 is a damocloid. 1999 XS35 is a small object with an absolute magnitude (H) of 17.2, which implies a size of about 1 km.[4]
Discoverydate2 December 1999
The comet-like orbit of 1999 XS35 | |
| Discovery[1] | |
|---|---|
| Discovered by | LONEOS |
| Discovery date | 2 December 1999 |
| Designations | |
| PHA Apollo[2] | |
| Orbital characteristics[2] | |
| Epoch 21 November 2025 (JD 2461000.5) | |
| Uncertainty parameter 5 | |
| Aphelion | 34.690 AU (5.1896 Tm) (beyond Neptune) |
| Perihelion | 0.93889 AU (140.456 Gm) |
| 17.815 AU (2.6651 Tm) | |
| Eccentricity | 0.94730 |
| 75.19 yr (27464 d) | |
| 124.72° | |
| 0° 0m 47.189s /day (n) | |
| Inclination | 19.608° |
| 48.816° | |
| 333.27° | |
| Earth MOID | 0.00018624 AU (0.027861 Gm) |
| TJupiter | 1.409 |
| Physical characteristics | |
| 1.3 km (est. at 0.14)[3] | |
| 13.7 to 32 | |
| 17.69[2] | |
1999 XS35 came to perihelion on 21 October 1999,[2] passed 0.0453 AU (6,780,000 km; 4,210,000 mi) from Earth on 5 November 1999,[5] and was discovered on 2 December 1999 at about apparent magnitude 16.9.[1]