+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   46949 (1998 SL117) Classification: Main-belt Asteroid          SPK-ID: 2046949 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .104171135534809 3.9927e-08   a 2.592144978254581 1.3319e-08 au q 2.322118292398949 1.0781e-07 au i 10.0967691970152 4.2233e-06 deg node 214.5900592210703 2.0608e-05 deg peri 355.5225584613075 2.8094e-05 deg M 233.8775357827227 2.2096e-05 deg tp 2459534.544326311835 (2021-Nov-16.04432631) 9.5787e-05 TDB period 1524.359349188199 4.17 1.1749e-05 3.217e-08 d yr n .2361647863357933 1.8202e-09 deg/d Q 2.862171664110214 1.4707e-08 au   Orbit Determination Parameters    # obs. used (total)      1685      data-arc span      9224 days (25.25 yr)      first obs. used      1994-10-26      last obs. used      2020-01-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49645      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 08:37:57   Additional Information  Earth MOID = 1.3166 au   Jupiter MOID = 2.10658 au   T_jup = 3.390  [ hide covariance matrix ] Orbital Elements at Epoch 2456792.5 (2014-May-15.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1040868592209008 3.9882e-08   q 2.32250972352524 1.0767e-07 au tp 2456488.405704436270 (2013-Jul-14.90570444) 8.549e-05 TDB node 214.6102729985267 2.0614e-05 deg peri 356.0327562025424 2.8165e-05 deg i 10.09431605965684 4.2234e-06 deg   Orbit Determination Parameters    # obs. used (total)      1685      data-arc span      9224 days (25.25 yr)      first obs. used      1994-10-26      last obs. used      2020-01-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49645      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 08:37:57   Additional Information  Jupiter MOID = 2.10658 au   T_jup = 3.390  Orbit Covariance (6×6)   e q tp node peri i e 1.590540325629787E-15 -4.270050179876161E-15 -8.681825266275301E-13 -7.135831958459708E-15 -1.909552190656196E-13 -5.072265689033228E-16 q -4.270050179876161E-15 1.159255380857599E-14 2.603288026937845E-12 1.927521548246181E-14 5.778811282580043E-13 1.429614082428198E-15 tp -8.681825266275301E-13 2.603288026937845E-12 7.308568882719545E-9 1.180737291250558E-11 1.653404875305227E-9 -1.176553732258148E-12 node -7.135831958459708E-15 1.927521548246181E-14 1.180737291250558E-11 4.249350253252552E-10 -4.154051704987311E-10 -1.088000194482058E-11 peri -1.909552190656196E-13 5.778811282580043E-13 1.653404875305227E-9 -4.154051704987311E-10 7.932411487394812E-10 1.047496465258E-11 i -5.072265689033228E-16 1.429614082428198E-15 -1.176553732258148E-12 -1.088000194482058E-11 1.047496465258E-11 1.783699634641341E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.1   n/a MPO502468   diameter diameter 4.182 km 0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.176   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   46949 (1998 SL117)          Discovered 1998-Sep-26 by LINEAR at Socorro Reference: 20020921/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1998 SL117 = 2000 AE166  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-13 03:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin