+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   12936 (2549 P-L) Classification: Main-belt Asteroid          SPK-ID: 2012936 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03764846306252259 2.7587e-08   a 2.830459872572198 1.2015e-08 au q 2.723897408609711 7.6514e-08 au i 2.142461092951854 4.7273e-06 deg node 167.4670012414596 8.803e-05 deg peri 284.4664676515532 0.00011095 deg M 108.4886580733249 6.7583e-05 deg tp 2458476.337717598258 (2018-Dec-23.83771760) 0.00032591 TDB period 1739.337779780539 4.76 1.1075e-05 3.032e-08 d yr n .2069753237036126 1.3178e-09 deg/d Q 2.937022336534685 1.2467e-08 au   Orbit Determination Parameters    # obs. used (total)      1885      data-arc span      21843 days (59.80 yr)      first obs. used      1960-09-24      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54343      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:49:38   Additional Information  Earth MOID = 1.74154 au   Jupiter MOID = 2.12441 au   T_jup = 3.311  [ 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 13.8   n/a MPO502266   diameter diameter 5.136 km 0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.267   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   12936 (2549 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar Reference: 19991222/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2549 P-L = 1998 SM22  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Dec-05 10:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin