1999 XS35 explained

Minorplanet:yes
Background:
  1. FFC2E0
Discoverer:LONEOS
Discovered:2 December 1999
Mp Category:PHA
Apollo
Epoch:13 January 2016 (JD 2457400.5)
Uncertainty:4
Aphelion:34.711abbr=onNaNabbr=on
(beyond Neptune)
Perihelion:0.95932AU
Semimajor:17.835AU
Eccentricity:0.94621
Period:75.32 yr (27512 d)
Inclination:19.414°
Asc Node:49.206°
Mean Anomaly:77.641°
Mean Motion: /day (n)
Arg Peri:333.00°
Moid:0.0181452AU
Tisserand:1.407
Magnitude:13.7 to 32
Abs Magnitude:17.2

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 comes as close as 0.9 AU to the Sun, while at the aphelion it reaches beyond the orbit of Neptune. is a damocloid. is a small object with an absolute magnitude (H) of 17.2, which implies a size of about 1 km.

came to perihelion on 21 October 1999, passed 0.0453abbr=onNaNabbr=on from Earth on 5 November 1999, and was discovered on 2 December 1999 at about apparent magnitude 16.9.