+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   33342 (1998 WT24) Classification: Aten [NEO, PHA]          SPK-ID: 2033342 [ 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 185 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4175896409943655 1.6138e-08   a .7189046143773354 3.4458e-09 au q .4186974945503112 1.3129e-08 au i 7.365791168339653 2.8244e-06 deg node 81.69309904864618 2.4387e-06 deg peri 167.5570011928635 4.3419e-06 deg M 319.6992808448076 2.2874e-05 deg tp 2459025.423878700673 (2020-Jun-24.92387870) 1.432e-05 TDB period 222.6410972392329 0.61 1.6007e-06 4.382e-09 d yr n 1.616952146140261 1.1625e-08 deg/d Q 1.01911173420436 4.8847e-09 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A2 [EST] -2.343443380062496E-14 4.624E-15 ALN [SET] 1. n/a NK [SET] 0. n/a NM [SET] 2. n/a R0 [SET] 1. n/a   Orbit Determination Parameters    # obs. used (total)      1781      # delay obs. used      16      # Doppler obs. used      1      data-arc span      8054 days (22.05 yr)      first obs. used      1998-11-24      last obs. used      2020-12-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .32404      source      ORB      producer      Otto Matic      solution date      2020-Dec-13 05:25:42   Additional Information  Earth MOID = .0109013 au   Jupiter MOID = 4.0098 au   T_jup = 7.908   Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2  [ hide covariance matrix ] Orbital Elements at Epoch 2455548.5 (2010-Dec-18.0) TDB Reference: JPL 185 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4179397812740552 1.6273e-08   q .4181854634328386 1.1954e-08 au tp 2455465.224803724268 (2010-Sep-25.72480372) 3.8031e-06 TDB node 81.99795274041742 2.3542e-06 deg peri 167.2972225423969 4.3245e-06 deg i 7.342663469578412 2.8184e-06 deg Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A2 [EST] -2.343443380062496E-14 4.624E-15 ALN [SET] 1. n/a NK [SET] 0. n/a NM [SET] 2. n/a R0 [SET] 1. n/a   Orbit Determination Parameters    # obs. used (total)      1781      # delay obs. used      16      # Doppler obs. used      1      data-arc span      8054 days (22.05 yr)      first obs. used      1998-11-24      last obs. used      2020-12-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .32404      source      ORB      producer      Otto Matic      solution date      2020-Dec-13 05:25:42   Additional Information  Jupiter MOID = 4.0098 au   T_jup = 7.908   Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2  Orbit Covariance (7×7)   e q tp node peri i A2 e 2.648258984861924E-16 -1.944942537527961E-16 -3.792395039776858E-14 -1.263258603345703E-14 -5.599574236978235E-14 -4.307032058531807E-14 -5.432082899745935E-23 q -1.944942537527961E-16 1.428883314042909E-16 2.720142252725283E-14 8.82449115462955E-15 4.167050317419314E-14 3.151476884532463E-14 4.058987874434533E-23 tp -3.792395039776858E-14 2.720142252725283E-14 1.446393880800965E-11 8.071894956447462E-12 5.324681794961121E-13 7.703959903186093E-12 -1.801538683658655E-21 node -1.263258603345703E-14 8.82449115462955E-15 8.071894956447462E-12 5.542437756616165E-12 -3.117163500553358E-12 2.644044474687651E-12 -4.012136463424552E-21 peri -5.599574236978235E-14 4.167050317419314E-14 5.324681794961121E-13 -3.117163500553358E-12 1.870161531951275E-11 8.203806758919561E-12 1.945460229733406E-20 i -4.307032058531807E-14 3.151476884532463E-14 7.703959903186093E-12 2.644044474687651E-12 8.203806758919561E-12 7.943384114543421E-12 7.052105022334591E-21 A2 -5.432082899745935E-23 4.058987874434533E-23 -1.801538683658655E-21 -4.012136463424552E-21 1.945460229733406E-20 7.052105022334591E-21 2.138394484844654E-29 [ 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 17.9   n/a PDS3 (MPO 21376)   diameter diameter 0.432 km 0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   rotation period rot_per 3.697 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2001) http://www.asu.cas.cz/~ppravec/neo.htm] [Krugly, Yu.N.; Belskaya, I.N.; Chiorny, V.G.; Shevchenko, V.G.; Gaflonyuk, N.M. (2002) Proc. ACM 2002, ESA SP 500, 903-906.] [Busch, M.W.; Benner, L.A.M.; Ostro, S.J.; Giorgini, J.D.; et al. (2008) Icarus 195, 614-621.] [Robinson, L. (2011) http://btboar.tripod.com/lightcurves/] [Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2016) Minor Planet Bull. 43, 143-154.] geometric albedo albedo 0.654   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   33342 (1998 WT24)          Discovered 1998-Nov-25 by LINEAR at Socorro Reference: 20020128/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-01 20:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin