+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2017 HF1) Classification: Aten [NEO]          SPK-ID: 3774018 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2457869.5 (2017-Apr-26.0) TDB Reference: JPL 7 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6403592470763956 0.001069   a .9773975660128821 0.00066814 au q .3515119965465713 0.00080457 au i 13.19880370776667 0.038435 deg node 37.66628647032019 0.019771 deg peri 309.1798766060338 0.030234 deg M 296.0369241541946 0.13706 deg tp 2457932.209327838161 (2017-Jun-27.70932784) 0.070075 TDB period 352.9435963361106 0.97 0.36191 0.0009909 d yr n 1.019993006636589 0.0010459 deg/d Q 1.603283135479193 0.001096 au   Orbit Determination Parameters    # obs. used (total)      74      data-arc span      12 days      first obs. used      2017-04-17      last obs. used      2017-04-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      8      norm. resid. RMS      .47198      source      ORB      producer      Otto Matic      solution date      2017-Apr-30 06:18:27   Additional Information  Earth MOID = .0101293 au   Jupiter MOID = 3.84755 au   T_jup = 5.972  [ 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 22.5   n/a MPO405800   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-04 20:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin