+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5539 Limporyen (1965 UA1) Classification: Main-belt Asteroid          SPK-ID: 2005539 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .157686984569266 1.3077e-08   a 2.435188089374624 6.8738e-09 au q 2.051190622702148 3.0437e-08 au i 1.823604643842993 1.797e-06 deg node 295.5115081884355 5.9805e-06 deg peri 122.2432124596983 1.4615e-05 deg M 154.1463181167537 1.0486e-05 deg tp 2458606.169732321704 (2019-May-02.66973232) 3.9537e-05 TDB period 1388.02469613403 3.80 5.877e-06 1.609e-08 d yr n .2593613795220526 1.0981e-09 deg/d Q 2.819185556047101 7.9577e-09 au   Orbit Determination Parameters    # obs. used (total)      2554      data-arc span      19963 days (54.66 yr)      first obs. used      1965-10-16      last obs. used      2020-06-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45696      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 17:40:17   Additional Information  Earth MOID = 1.06332 au   Jupiter MOID = 2.50879 au   T_jup = 3.487  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.87   n/a E2021B10   diameter diameter 10.362 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.055   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   5539 Limporyen           Discovered 1965 Oct. 16 at the Purple Mountain Observatory. Lim Poryen (b. 1914) is a prestigious philanthropist who helped launch many schools and a first-class Limporyen library in China. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20041126/MPCPages.arc Last Updated: 2004-12-06 [ show close-approach data ] Alternate Designations  1965 UA1 = 1984 UY4 = 1988 XQ3 = 1991 NS3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 08:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin