+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2018 HO) Classification: Amor [NEO]          SPK-ID: 3803907 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 6 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2203244419011832 0.00021985   a 1.30535597153208 0.00038409 au q 1.017754145621897 1.248e-05 au i 5.762222835497641 0.0046683 deg node 197.2161490019919 0.00038683 deg peri 4.734904275123194 0.0039303 deg M 287.2386081063456 0.28828 deg tp 2459310.600772167703 (2021-Apr-06.10077217) 0.48481 TDB period 544.7432621726682 1.49 0.24043 0.0006583 d yr n .6608617765443608 0.00029168 deg/d Q 1.592957797442262 0.00046871 au   Orbit Determination Parameters    # obs. used (total)      59      data-arc span      35 days      first obs. used      2018-04-18      last obs. used      2018-05-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      7      norm. resid. RMS      .32483      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 20:28:03   Additional Information  Earth MOID = .0158656 au   Jupiter MOID = 3.36289 au   T_jup = 4.958  [ 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 26.7   n/a MPO450738   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-21 21:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin