+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14638 (1998 WQ1) Classification: Main-belt Asteroid          SPK-ID: 2014638 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .14898068341397 3.3922e-08   a 3.140781796887189 1.4911e-08 au q 2.672865978332779 1.1281e-07 au i 1.16100907823306 4.2279e-06 deg node 195.933976895567 0.0001599 deg peri 255.6716779619895 0.00016063 deg M 5.766463394788191 1.376e-05 deg tp 2459363.934172851748 (2021-May-29.43417285) 7.7683e-05 TDB period 2033.082839642535 5.57 1.4478e-05 3.964e-08 d yr n .1770709943443803 1.2609e-09 deg/d Q 3.608697615441599 1.7132e-08 au   Orbit Determination Parameters    # obs. used (total)      1570      data-arc span      9985 days (27.34 yr)      first obs. used      1993-12-09      last obs. used      2021-04-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50153      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:18:45   Additional Information  Earth MOID = 1.68987 au   Jupiter MOID = 1.58763 au   T_jup = 3.193  [ 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 13.97   n/a E2021B10   diameter diameter 8.177 km 0.220 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.080   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   14638 (1998 WQ1)          Discovered 1998-Nov-18 by Kobayashi, T. at Oizumi Reference: 20000418/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 WQ1 = 1997 SZ28  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Aug-03 12:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin