+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101509 (1998 XN20) Classification: Main-belt Asteroid          SPK-ID: 2101509 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1239168581053252 5.2262e-08   a 2.737202095967934 1.8784e-08 au q 2.398016612236277 1.4454e-07 au i 6.661071364438595 5.0331e-06 deg node 279.9258672527427 4.7405e-05 deg peri 259.1477764741339 5.2011e-05 deg M 206.9647478790542 2.5586e-05 deg tp 2459703.649553423836 (2022-May-04.14955342) 0.00012113 TDB period 1654.088425538229 4.53 1.7027e-05 4.662e-08 d yr n .2176425361799255 2.2404e-09 deg/d Q 3.076387579699591 2.1112e-08 au   Orbit Determination Parameters    # obs. used (total)      288      data-arc span      8012 days (21.94 yr)      first obs. used      1998-12-10      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57323      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:29:21   Additional Information  Earth MOID = 1.41276 au   Jupiter MOID = 1.95803 au   T_jup = 3.331  [ 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 15.9   n/a MPO449615   diameter diameter 3.729 km 0.951 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.055   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101509 (1998 XN20)          Discovered 1998-Dec-10 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1915-Nov-07 16:28 00:03 Jupiter 1.95464551817168 1.95464502991263 1.95464600643062 2.26238988774832 2.06197275930792 2420809.186287068 3.12179086584369 234.643745130506 17.271950035727 86.3707077400439 2224986.20925393 T 14 CATAB v2.0f-lin.ifort 2020-Dec-17 22:29:21 2020-Dec-17 22:29 2011-Apr-03 05:44 < 00:01 Jupiter 1.9650871349009 1.96508664140088 1.96508762840081 2.29949312711262 2.10371039784711 2455654.738726004 0.248554402024751 46.2382058106516 12.3904105182526 -76.6749150643613 2281487.16149213 T 14 CATAB v2.0f-lin.ifort 2020-Dec-17 22:29:21 2020-Dec-17 22:29 2069-Oct-22 02:18 00:02 Jupiter 1.96410871400082 1.9641081777812 1.96410925022156 2.36515416574013 2.1751904705695 2477041.595711411 1.66214925303555 151.157193410397 16.1256708803088 88.2758085393967 2320892.7999594 T 14 CATAB v2.0f-lin.ifort 2020-Dec-17 22:29:21 2020-Dec-17 22:29 2165-Mar-18 19:32 00:05 Jupiter 1.95706522802431 1.95706473550639 1.95706572054223 2.22166368375657 2.01746988473654 2511887.314066058 4.6398419541152 245.631347380036 14.3411276571187 -87.9848659030503 2173743.94396412 T 14 CATAB v2.0f-lin.ifort 2020-Dec-17 22:29:21 2020-Dec-17 22:29 Alternate Designations  1998 XN20 = 2004 FC14  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 07:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin