+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1608378034718867 3.5645e-08   a 2.793591104728644 1.111e-08 au q 2.344276047645487 1.007e-07 au i 9.083669204737214 3.6433e-06 deg node 60.50146724756539 2.1232e-05 deg peri 169.1791677080684 2.3552e-05 deg M 271.5609107981633 1.1289e-05 deg tp 2459619.471465757624 (2022-Feb-08.97146576) 5.4415e-05 TDB period 1705.464507085991 4.67 1.0174e-05 2.785e-08 d yr n .2110861870793823 1.2592e-09 deg/d Q 3.2429061618118 1.2897e-08 au   Orbit Determination Parameters    # obs. used (total)      2547      data-arc span      10272 days (28.12 yr)      first obs. used      1993-01-28      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41844      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 22:53:09   Additional Information  Earth MOID = 1.33315 au   Jupiter MOID = 1.7497 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-Apr-19 17:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin