+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06396362314133372 2.8432e-08   a 2.294005126148952 7.5039e-09 au q 2.147272246775672 6.6152e-08 au i 1.51788063249262 3.5824e-06 deg node 116.3444319199044 0.00013605 deg peri 152.7887195549723 0.00013976 deg M 50.24248654195483 3.2731e-05 deg tp 2459219.383660894692 (2021-Jan-04.88366089) 0.00011521 TDB period 1269.082930930712 3.47 6.227e-06 1.705e-08 d yr n .2836694050687338 1.3919e-09 deg/d Q 2.440738005522231 7.9839e-09 au   Orbit Determination Parameters    # obs. used (total)      1674      data-arc span      11215 days (30.70 yr)      first obs. used      1990-10-21      last obs. used      2021-07-05      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53356      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 14:03:52   Additional Information  Earth MOID = 1.13118 au   Jupiter MOID = 2.59194 au   T_jup = 3.593  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 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 Alternate Designations  1996 HL25 = 1999 CO50  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-27 03:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin