+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74374 (1998 XN4) Classification: Main-belt Asteroid          SPK-ID: 2074374 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09883374781590167 3.6175e-08   a 2.657925048914825 1.3417e-08 au q 2.395232354916809 1.0013e-07 au i 3.058540406699104 3.9467e-06 deg node 100.1201996909835 8.4726e-05 deg peri 310.3217871208 8.8201e-05 deg M 346.7830910636588 2.5229e-05 deg tp 2459058.608534005163 (2020-Jul-28.10853401) 0.00011106 TDB period 1582.750728072245 4.33 1.1984e-05 3.281e-08 d yr n .227452114609653 1.7222e-09 deg/d Q 2.920617742912841 1.4743e-08 au   Orbit Determination Parameters    # obs. used (total)      906      data-arc span      7661 days (20.97 yr)      first obs. used      1998-11-11      last obs. used      2019-11-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54491      source      ORB      producer      Otto Matic      solution date      2019-Dec-04 06:46:22   Additional Information  Earth MOID = 1.40719 au   Jupiter MOID = 2.38916 au   T_jup = 3.378  [ 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 15.0   n/a MPO417339   diameter diameter 3.665 km 0.773 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.173   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   74374 (1998 XN4)          Discovered 1998-Dec-09 by Korlevic, K. at Visnjan Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 XN4 = 2002 RM19  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-06 14:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin