(15430) 1998 UR31

{{DISPLAYTITLE:{{mp|(15430) 1998 UR|31}}}}

{{Infobox planet

| name = {{mp|(15430) 1998 UR|31}}

| background = #D6D6D6

| minorplanet = yes

| discovery_ref =

| discoverer = SCAP

| discovered = 22 October 1998

| discovery_site = Beijing Xinglong Obs.

| mp_category = main-belt

| alt_names = {{mp|1998 UR|31}}; {{mp|1980 EK|1}}
{{mp|2000 AB|153}}

| mpc_name = {{mp|(15430) 1998 UR|31}}

| orbit_ref =

| epoch = 13 January 2016 (JD 2457400.5)

| uncertainty = 0

| observation_arc = 22044 days (60.35 yr)

| aphelion = {{Convert|2.6001|AU|Gm|abbr=on|lk=on}}

| perihelion = {{Convert|1.8433|AU|Gm|abbr=on}}

| semimajor = {{Convert|2.2217|AU|Gm|abbr=on}}

| eccentricity = 0.17032

| period = 3.31 yr (1209.6 d)

| mean_anomaly = 245.22°

| mean_motion = {{Deg2DMS|0.29763|sup=ms}} / day

| inclination = 8.1801°

| asc_node = 62.806°

| arg_peri = 177.42°

| moid = {{Convert|0.829914|AU|Gm|abbr=on}}

| rotation = {{Convert|2.52735|h|d|abbr=on|lk=on}}

| albedo =

| abs_magnitude = 14.2

}}

{{mp|(15430) 1998 UR|31}} is a main-belt binary asteroid. It was discovered through the Beijing Schmidt CCD Asteroid Program at the Xinglong Station in the Chinese province of Hebei on October 22, 1998. A moon was discovered orbiting the asteroid in 2010. The moon has an orbital period of almost exactly a day, and is tidally locked with the asteroid.{{cite web |last1=Johnston |first1=Robert |title=(15430) 1998 UR31 |url=http://www.johnstonsarchive.net/astro/astmoons/am-15430.html |website=johnstonsarchive.net |accessdate=29 May 2015}}