+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21266 (1996 HL25) Classification: Main-belt Asteroid          SPK-ID: 2021266 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06352702719077084 2.8577e-08   a 2.293177232122519 7.4317e-09 au q 2.147498499744215 6.6447e-08 au i 1.517755232013176 3.5849e-06 deg node 116.3439978416105 0.00013654 deg peri 152.8733595588961 0.00014028 deg M 354.5732585060447 3.2927e-05 deg tp 2459219.620158676561 (2021-Jan-05.12015868) 0.00011603 TDB period 1268.395985183542 3.47 6.1659e-06 1.688e-08 d yr n .2838230365006292 1.3797e-09 deg/d Q 2.438855964500823 7.9038e-09 au   Orbit Determination Parameters    # obs. used (total)      1651      data-arc span      10839 days (29.68 yr)      first obs. used      1990-10-21      last obs. used      2020-06-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53172      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:58:01   Additional Information  Earth MOID = 1.12969 au   Jupiter MOID = 2.59477 au   T_jup = 3.594  [ 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 15.06   n/a E2021B10   diameter diameter 2.672 km 0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.271   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21266 (1996 HL25)          Discovered 1996-Apr-20 by Elst, E. W. at La Silla Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1996 HL25 = 1999 CO50  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-13 04:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin