+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5585 Parks (1990 MJ) Classification: Mars-crossing Asteroid          SPK-ID: 2005585 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3992794411736524 7.0341e-08   a 2.711303475365609 1.2202e-08 au q 1.628735738869447 1.8892e-07 au i 28.59275191067675 6.3106e-06 deg node 264.8323489012363 1.3812e-05 deg peri 76.14778080379254 1.5734e-05 deg M 230.3430567465241 7.1417e-06 deg tp 2459587.798512458721 (2022-Jan-08.29851246) 3.4123e-05 TDB period 1630.668278765483 4.46 1.1008e-05 3.014e-08 d yr n .2207683835442867 1.4904e-09 deg/d Q 3.793871211861771 1.7074e-08 au   Orbit Determination Parameters    # obs. used (total)      637      data-arc span      14057 days (38.49 yr)      first obs. used      1981-06-29      last obs. used      2019-12-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40925      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 17:41:41   Additional Information  Earth MOID = .818511 au   Jupiter MOID = 2.30552 au   T_jup = 3.081  [ 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 14.0   n/a MPO435752   rotation period rot_per 10.344 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Stephens, R.D. (2018) Minor Planet Bull. 45, 135-137.] SMASSII spectral type spec_B Ch   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) 5585 Parks (1990 MJ)          Discovered 1990-Jun-28 by Helin, E. F. at Palomar Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-15 22:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin