+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1609900802449553 4.3002e-08   a 2.793420846842917 1.2446e-08 au q 2.343707800551745 1.185e-07 au i 9.084655246793233 4.496e-06 deg node 60.50729601185013 2.2278e-05 deg peri 169.1763531366532 2.4475e-05 deg M 229.3545860953558 1.1197e-05 deg tp 2459619.363187796797 (2022-Feb-08.86318780) 5.4472e-05 TDB period 1705.308597892752 4.67 1.1397e-05 3.12e-08 d yr n .2111054858017203 1.4109e-09 deg/d Q 3.24313389313409 1.445e-08 au   Orbit Determination Parameters    # obs. used (total)      2313      data-arc span      10142 days (27.77 yr)      first obs. used      1993-01-28      last obs. used      2020-11-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43356      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:46:37   Additional Information  Earth MOID = 1.33386 au   Jupiter MOID = 1.75062 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 13.3   n/a MPO332929   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-Jan-15 17:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin