+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100085 (1992 UY4) Classification: Apollo [NEO, PHA]          SPK-ID: 2100085 [ 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 104 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6188532437896024 9.7342e-09   a 2.652313175534919 1.3434e-08 au q 1.010920563309234 2.6711e-08 au i 2.642085724864565 4.7109e-06 deg node 305.2292882970162 2.7456e-05 deg peri 42.1417268118368 2.892e-05 deg M 152.9913729013395 8.3166e-06 deg tp 2458329.998008668057 (2018-Jul-30.49800867) 3.1754e-05 TDB period 1577.740707217263 4.32 1.1987e-05 3.282e-08 d yr n .2281743751385797 1.7336e-09 deg/d Q 4.293705787760605 2.1748e-08 au   Orbit Determination Parameters    # obs. used (total)      624      # delay obs. used      13      # Doppler obs. used      0      data-arc span      14445 days (39.55 yr)      first obs. used      1979-06-29      last obs. used      2019-01-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .34114      source      ORB      producer      Otto Matic      solution date      2019-Jan-22 08:09:21   Additional Information  Earth MOID = .0253978 au   Jupiter MOID = 1.16695 au   T_jup = 3.082  [ 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 17.8   n/a MPO264054   rotation period rot_per 12.9060 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D.; Jacques, C.; Pimentel, E.; Crawford, G.; et al. (2006) Minor Planet Bull. 33, 20-21.] 100085 (1992 UY4)          Discovered 1992-Oct-25 by Shoemaker, C. S. at Palomar 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 ] 2020-Oct-20 15:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin