+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2015 XQ55) Classification: Aten [NEO]          SPK-ID: 3735998 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5698874426319815 1.4116e-06   a .8485597776097539 1.2386e-07 au q .3649762160273682 1.1446e-06 au i 9.562619498752186 2.9903e-05 deg node 54.00797389017591 2.6832e-05 deg peri 193.7806638023607 2.4762e-05 deg M 15.01582685795756 0.00036228 deg tp 2459188.591176981646 (2020-Dec-05.09117698) 0.00028472 TDB period 285.5105034948919 0.78 6.2513e-05 1.712e-07 d yr n 1.260899321017241 2.7608e-07 deg/d Q 1.33214333919214 1.9445e-07 au   Orbit Determination Parameters    # obs. used (total)      100      data-arc span      1096 days (3.00 yr)      first obs. used      2015-12-04      last obs. used      2018-12-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      2      norm. resid. RMS      .57367      source      ORB      producer      Otto Matic      solution date      2019-Jan-21 07:49:33   Additional Information  Earth MOID = .076455 au   Jupiter MOID = 3.70441 au   T_jup = 6.786  [ 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 21.8   n/a E2018W74   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-04 18:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin