+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2009 HU44) Classification: Aten [NEO]          SPK-ID: 3458579 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6439442421941292 0.00040676   a .8302130115147669 8.0331e-05 au q .2956021229551845 0.0003091 au i 6.635766893088585 0.0086573 deg node 212.8715350149324 0.0028932 deg peri 213.6358324110604 0.011397 deg M 228.6114397080616 0.91898 deg tp 2459301.341148497506 (2021-Mar-27.84114850) 0.71996 TDB period 276.301174002053 0.76 0.040102 0.0001098 d yr n 1.302926059942565 0.00018911 deg/d Q 1.364823900074349 0.00013206 au   Orbit Determination Parameters    # obs. used (total)      63      data-arc span      21 days      first obs. used      2009-04-22      last obs. used      2009-05-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      6      norm. resid. RMS      .52494      source      ORB      producer      Otto Matic      solution date      2017-Apr-06 09:00:43   Additional Information  Earth MOID = .00604897 au   Jupiter MOID = 3.96594 au   T_jup = 6.875  [ 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 22.6   n/a MPO158645   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-04 19:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin