+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100926 (1998 MQ) Classification: Amor [NEO]          SPK-ID: 2100926 [ 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 .4074179258573802 3.3285e-08   a 1.78298906568867 4.2245e-09 au q 1.056567358719404 5.9435e-08 au i 24.23865936967699 7.8553e-06 deg node 221.1091470870976 9.0544e-06 deg peri 138.7563710257484 9.8964e-06 deg M 27.18811217900495 6.2078e-06 deg tp 2458934.825314908717 (2020-Mar-26.32531491) 1.4779e-05 TDB period 869.6038355733775 2.38 3.0906e-06 8.462e-09 d yr n .4139816147000228 1.4713e-09 deg/d Q 2.509410772657937 5.9457e-09 au   Orbit Determination Parameters    # obs. used (total)      1216      # delay obs. used      1      # Doppler obs. used      2      data-arc span      14441 days (39.54 yr)      first obs. used      1979-12-19      last obs. used      2019-07-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .38637      source      ORB      producer      Otto Matic      solution date      2019-Jul-05 06:21:12   Additional Information  Earth MOID = .130426 au   Jupiter MOID = 3.10156 au   T_jup = 3.893  [ 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 16.6   n/a MPO436470   diameter diameter 1.174 km 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2012ApJ...760L..12M)   rotation period rot_per 2.328 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: [Warner, B.D. (2011) Minor Planet Bull. 38, 82-86.] [Warner, B.D. (2017) Minor Planet Bull. 44, 335-344.] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.] geometric albedo albedo 0.234   0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2012ApJ...760L..12M)   SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 100926 (1998 MQ)          Discovered 1998-Jun-18 by LONEOS at Anderson Mesa Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-01 18:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin