+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   173606 (2001 EU8) Classification: Main-belt Asteroid          SPK-ID: 2173606 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .157057057521403 5.2379e-08   a 2.342149046710254 9.9562e-09 au q 1.974298009157382 1.2264e-07 au i 1.983282281893171 4.2713e-06 deg node 98.35336594455119 0.00021619 deg peri 41.02066341159011 0.00021717 deg M 153.5078675904462 2.0807e-05 deg tp 2458442.224771474421 (2018-Nov-19.72477147) 7.4612e-05 TDB period 1309.242877410125 3.58 8.3482e-06 2.286e-08 d yr n .2749680798051259 1.7533e-09 deg/d Q 2.710000084263125 1.152e-08 au   Orbit Determination Parameters    # obs. used (total)      382      data-arc span      6674 days (18.27 yr)      first obs. used      2001-02-17      last obs. used      2019-05-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5765      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 17:06:38   Additional Information  Earth MOID = .988099 au   Jupiter MOID = 2.31067 au   T_jup = 3.546  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.8   n/a MPO268141   rotation period rot_per 5.43 h n/a LCDB (Rev. 2019-August); 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: [Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.] 173606 (2001 EU8)          Discovered 2001-Mar-02 by LONEOS at Anderson Mesa Reference: 20080122/Numbers.arc Last Updated: 2008-01-28 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-11 08:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin