+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   243374 (2008 XW4) Classification: Main-belt Asteroid          SPK-ID: 2243374 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1549948230030739 9.2554e-08   a 3.121586836825159 3.3987e-08 au q 2.637757037562718 3.0048e-07 au i 15.40369285547464 9.7614e-06 deg node 292.0043942443864 2.2365e-05 deg peri 228.3141592825994 3.3075e-05 deg M 344.2732839844221 2.4689e-05 deg tp 2459088.502923887532 (2020-Aug-27.00292389) 0.00013858 TDB period 2014.473496445801 5.52 3.29e-05 9.008e-08 d yr n .1787067442858689 2.9186e-09 deg/d Q 3.6054166360876 3.9255e-08 au   Orbit Determination Parameters    # obs. used (total)      372      data-arc span      9004 days (24.65 yr)      first obs. used      1995-09-23      last obs. used      2020-05-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55728      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 00:56:58   Additional Information  Earth MOID = 1.67558 au   Jupiter MOID = 1.59743 au   T_jup = 3.142  [ 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 14.8   n/a MPO470595   diameter diameter 3.809 km 0.835 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.176   0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   243374 (2008 XW4)          Discovered 2008-Dec-03 by LINEAR at Socorro Reference: 20100626/Numbers.arc Last Updated: 2010-06-28 [ 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 1962-Jun-08 18:26 00:03 Jupiter 1.63396085020555 1.633959640441 1.63396205997205 3.78973920351401 3.65039054414121 2437824.268068556 2.59684977111905 317.459431027705 58.2359625263826 -86.0664622282552 1047156.81714356 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:56:59 2020-Nov-12 00:57 1972-Oct-30 09:51 00:02 Jupiter 1.90740471998816 1.90740299653692 1.90740644345815 4.84726795511726 4.75477289296833 2441620.910324905 1.86020352690091 344.600513178985 31.6433172621634 76.9287642944126 1698207.64870466 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:56:59 2020-Nov-12 00:57 2035-Apr-27 03:47 00:02 Jupiter 1.95291067678668 1.95290926269265 1.95291209087915 1.81391636221853 1.55654949328185 2464444.657685613 1.6024933627141 216.498934730759 112.216575058913 3.96680198103065 502355.556604095 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:56:59 2020-Nov-12 00:57 2045-Feb-22 22:38 00:02 Jupiter 1.62883651381571 1.62883556417013 1.62883746346175 4.07378615929812 3.9440714838993 2468034.442762279 1.63966045955685 240.88521774344 43.043960699178 87.2970026886711 1260534.91594772 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:56:59 2020-Nov-12 00:57 2117-Nov-03 11:12 00:09 Jupiter 1.86622611147434 1.86622329390981 1.86622893196294 1.262884004871 0.828937662791877 2494584.966851846 8.8461846154579 7188.81278721166 258.151780399903 60.538273361104 4181627.69039469 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:56:59 2020-Nov-12 00:57 2127-Nov-14 10:46 00:05 Jupiter 1.66422359195685 1.66422179294076 1.66422539109375 4.31998416882498 4.20051712155027 2498247.948414356 5.45393091760565 798.712958412285 33.5450458527378 84.7895102385036 1282437.79146947 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:56:59 2020-Nov-12 00:57 2200-May-16 04:02 00:14 Jupiter 1.77568466340145 1.77567991555718 1.77568941155358 2.25702406194106 2.03473193336031 2524728.668374844 13.5289452653756 1521.81231608858 234.792504323611 56.5611048322559 362085.768060427 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:56:59 2020-Nov-12 00:57 Alternate Designations  2008 XW4 = 1995 SM35 = 2007 UM7 = 2007 VC300  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 23:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin