+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101796 (1999 HN3) Classification: Main-belt Asteroid          SPK-ID: 2101796 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1033452967614397 1.2536e-07   a 2.535759648951551 1.2855e-08 au q 2.273700815514969 3.2163e-07 au i 15.73962845228014 6.4741e-06 deg node 53.8385708936021 1.5898e-05 deg peri 339.4755935985649 2.8105e-05 deg M 239.0527548435857 2.028e-05 deg tp 2459496.011840883510 (2021-Oct-08.51184088) 8.4308e-05 TDB period 1474.893144423167 4.04 1.1215e-05 3.07e-08 d yr n .2440854792506318 1.8561e-09 deg/d Q 2.797818482388133 1.4184e-08 au   Orbit Determination Parameters    # obs. used (total)      1364      data-arc span      8319 days (22.78 yr)      first obs. used      1997-12-06      last obs. used      2020-09-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53391      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:58:27   Additional Information  Earth MOID = 1.28719 au   Jupiter MOID = 2.61333 au   T_jup = 3.389  [ 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 14.1   n/a MPO436476   diameter diameter 3.838 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.362   0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101796 (1999 HN3)          Discovered 1999-Apr-18 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2193-Nov-18 03:19 00:02 Amphi 0.0364179810074861 0.0363905281386762 0.0364454360623208 4.24711258302655 4.24711254585905 2522358.638399669 2.43585593065047 1439.33390379472 108.681139301659 -18.1130547919778 15986.389314518 T 26 CATAB v2.0f-lin.ifort 2020-Nov-12 19:58:30 2020-Nov-12 19:58 Alternate Designations  1999 HN3 = 2001 UM66  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 10:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin