+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (1998 HH49) Classification: Apollo [NEO, PHA]          SPK-ID: 3013045 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5023285464423836 3.4518e-07   a 1.550750352905033 2.7678e-07 au q .7717641822352346 4.1422e-07 au i 8.418292545450459 3.373e-05 deg node 23.49776931427357 0.00010865 deg peri 287.8578243277265 0.00012478 deg M 114.6524523329448 0.0011475 deg tp 2458775.857404893389 (2019-Oct-19.35740489) 0.0021883 TDB period 705.3607017801385 1.93 0.00018884 5.17e-07 d yr n .5103771716959252 1.3664e-07 deg/d Q 2.329736523574832 4.1581e-07 au   Orbit Determination Parameters    # obs. used (total)      19      data-arc span      971 days (2.66 yr)      first obs. used      1998-04-28      last obs. used      2000-12-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      2      norm. resid. RMS      .79369      source      ORB      producer      Otto Matic      solution date      2017-Apr-06 09:17:50   Additional Information  Earth MOID = .00276723 au   Jupiter MOID = 3.00925 au   T_jup = 4.289  [ 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 21.3   .8917 12 autocmod 2.6i [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-18 18:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin