+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21151 (1993 LO1) Classification: Main-belt Asteroid          SPK-ID: 2021151 [ 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 .2659818382159195 3.2714e-08   a 2.620656920428829 1.1308e-08 au q 1.923609775399898 8.4105e-08 au i 10.73822713831454 3.6216e-06 deg node 311.750682443713 2.0507e-05 deg peri 293.0620153099438 2.2174e-05 deg M 166.8582884375104 1.1043e-05 deg tp 2458482.277568293812 (2018-Dec-29.77756829) 4.5763e-05 TDB period 1549.57885422072 4.24 1.003e-05 2.746e-08 d yr n .2323211877985024 1.5037e-09 deg/d Q 3.317704065457761 1.4316e-08 au   Orbit Determination Parameters    # obs. used (total)      1431      data-arc span      22022 days (60.29 yr)      first obs. used      1960-10-22      last obs. used      2021-02-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47492      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:40:34   Additional Information  Earth MOID = .938385 au   Jupiter MOID = 1.88465 au   T_jup = 3.330  [ 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 14.14   n/a E2021B10   diameter diameter 3.938 km 0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.326   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21151 (1993 LO1)          Discovered 1993-Jun-13 by McNaught, R. H. at Siding Spring Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1993 LO1 = 1998 QS76  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 11:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin