+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2020 HB1) Classification: Apollo [NEO]          SPK-ID: 54016577 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2458956.5 (2020-Apr-17.0) TDB Reference: JPL 2 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5722722149215944 0.00097136   a 2.37699001432797 0.005439 au q 1.01670467398199 1.7521e-05 au i 1.371157494234314 0.0018008 deg node 64.95513854648316 0.0071844 deg peri 147.6786032947543 0.0036578 deg M 358.7385438627272 0.0037656 deg tp 2458961.190391736658 (2020-Apr-21.69039174) 0.0021038 TDB period 1338.564992713469 3.66 4.5944 0.01258 d yr n .2689447295870385 0.0009231 deg/d Q 3.737275354673949 0.0085517 au   Orbit Determination Parameters    # obs. used (total)      23      data-arc span      5 days      first obs. used      2020-04-16      last obs. used      2020-04-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      8      norm. resid. RMS      .49287      source      ORB      producer      Otto Matic      solution date      2020-Apr-21 06:33:40   Additional Information  Earth MOID = .0157981 au   Jupiter MOID = 1.23091 au   T_jup = 3.297  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 27.018   .26353 2 autocmod 2.8 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-21 19:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin