+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2018 TW1) Classification: Apollo [NEO]          SPK-ID: 3831214 [ 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 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .471215607013045 0.0004845   a 1.898599846136376 0.0017432 au q 1.003949967164349 2.0457e-06 au i 8.659459397374654 0.0063598 deg node 192.8240270715242 0.00034301 deg peri 191.671080078571 0.0030665 deg M 298.8516203220078 0.41061 deg tp 2459362.804679580823 (2021-May-28.30467958) 1.3134 TDB period 955.5393774420074 2.62 1.316 0.003603 d yr n .3767505646535731 0.00051887 deg/d Q 2.793249725108402 0.0025646 au   Orbit Determination Parameters    # obs. used (total)      43      data-arc span      2 days      first obs. used      2018-10-05      last obs. used      2018-10-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      7      norm. resid. RMS      .511      source      ORB      producer      Otto Matic      solution date      2018-Oct-07 09:12:11   Additional Information  Earth MOID = .00967692 au   Jupiter MOID = 2.66464 au   T_jup = 3.794  [ 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 27.8   .34321 MPO458800 autocmod 2.6n [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-08 01:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin