1999 XS35

{{Use dmy dates|date=September 2020}}

{{DISPLAYTITLE:{{mp|1999 XS|35}}}}

{{Infobox planet

| minorplanet = yes

| background = #FFC2E0

| name = {{mp|1999 XS|35}}

| image = Damocloid-99XS35.png

| image_scale =

| caption = The comet-like orbit of {{mp|1999 XS|35}}

| discovery_ref =

| discoverer = LONEOS

| discovered = 2 December 1999

| mpc_name = {{mp|1999 XS|35}}

| mp_category = PHA
Apollo

| orbit_ref =

| epoch = 13 January 2016 (JD 2457400.5)

| uncertainty = 4

| aphelion = {{Convert|34.711|AU|Tm|abbr=on|lk=on}}
(beyond Neptune)

| perihelion = {{Convert|0.95932|AU|Gm|abbr=on}}

| semimajor = {{Convert|17.835|AU|Tm|abbr=on}}

| eccentricity = 0.94621

| period = 75.32 yr (27512 d)

| inclination = 19.414°

| asc_node = 49.206°

| mean_anomaly = 77.641°

| mean_motion = {{Deg2DMS|0.013085|sup=ms}} /day (n)

| arg_peri = 333.00°

| moid = {{Convert|0.0181452|AU|Gm|abbr=on}}

| tisserand = 1.407

| mean_diameter = {{val|1.3|ul=km}} {{small|(est. at 0.14)}}

| rotation =

| albedo =

| spectral_type =

| magnitude = 13.7 to 32

| abs_magnitude = 17.2

}}

{{mp|1999 XS|35}} 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 {{mp|1999 XS|35}} comes as close as 0.9 AU to the Sun, while at the aphelion it reaches beyond the orbit of Neptune. {{mp|1999 XS|35}} is a damocloid. {{mp|1999 XS|35}} is a small object with an absolute magnitude (H) of 17.2, which implies a size of about 1 km.

{{mp|1999 XS|35}} came to perihelion on 21 October 1999, passed {{convert|0.0453|AU|km mi|abbr=on|lk=on}} from Earth on 5 November 1999, and was discovered on 2 December 1999 at about apparent magnitude 16.9.