+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70005 (1998 XN28) Classification: Outer Main-belt Asteroid          SPK-ID: 2070005 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08883783270085109 3.3108e-08   a 3.232764272132308 2.139e-08 au q 2.945572500563329 1.1004e-07 au i 10.2455072308698 3.855e-06 deg node 52.38132767829985 2.1714e-05 deg peri 244.9968061888739 3.3407e-05 deg M 11.95092465994864 2.3772e-05 deg tp 2458930.021201581336 (2020-Mar-21.52120158) 0.00014035 TDB period 2123.046387845627 5.81 2.1071e-05 5.769e-08 d yr n .1695676562043056 1.6829e-09 deg/d Q 3.519956043701286 2.329e-08 au   Orbit Determination Parameters    # obs. used (total)      1924      data-arc span      11164 days (30.57 yr)      first obs. used      1990-04-24      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45879      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 21:54:05   Additional Information  Earth MOID = 1.94871 au   Jupiter MOID = 1.66601 au   T_jup = 3.155  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.6   n/a MPO493356   diameter diameter 15.578 km 3.790 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.055   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   70005 (1998 XN28)          Discovered 1998-Dec-14 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 XN28 = 1990 HT = 2000 AS228  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-19 06:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin