+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11633 (1996 XG9) Classification: Main-belt Asteroid          SPK-ID: 2011633 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1607185832801776 3.5126e-08   a 2.793314002639706 1.1041e-08 au q 2.344376533478771 9.9451e-08 au i 9.083532963981902 3.5509e-06 deg node 60.49427297743118 2.1217e-05 deg peri 169.2051421100091 2.3541e-05 deg M 312.9058355506758 1.1378e-05 deg tp 2459619.570766604831 (2022-Feb-09.07076660) 5.4402e-05 TDB period 1705.210760542363 4.67 1.011e-05 2.768e-08 d yr n .2111175980882841 1.2517e-09 deg/d Q 3.242251471800642 1.2815e-08 au   Orbit Determination Parameters    # obs. used (total)      2704      data-arc span      10364 days (28.38 yr)      first obs. used      1993-01-28      last obs. used      2021-06-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41851      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 02:45:14   Additional Information  Earth MOID = 1.33496 au   Jupiter MOID = 1.7492 au   T_jup = 3.291  [ 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 13.38   n/a E2021B10   rotation period rot_per 10.9283 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [McNeill, A.; Mommert, M.; Trilling, D.E.; Llama, J.; Skiff, B. (2019) Ap. J. Suppl. Series 245, id.29.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] 11633 (1996 XG9)          Discovered 1996-Dec-02 by Pauwels, T. at Uccle Reference: 19990928/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-Aug-03 16:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin