+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17874 (1998 YM3) Classification: Jupiter Trojan          SPK-ID: 2017874 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04494943619981385 4.0329e-08   a 5.228544835777799 8.7522e-08 au q 4.993524693264139 2.5651e-07 au i 2.546039453887309 5.4497e-06 deg node 46.01270678985698 0.00011039 deg peri 47.65681222372944 0.00013179 deg M 306.5487511614272 7.4465e-05 deg tp 2459648.873173308863 (2022-Mar-10.37317331) 0.00090872 TDB period 4366.864151221641 11.96 0.00010965 3.002e-07 d yr n .08243901974813875 2.07e-09 deg/d Q 5.46356497829146 9.1456e-08 au   Orbit Determination Parameters    # obs. used (total)      1156      data-arc span      24901 days (68.18 yr)      first obs. used      1951-12-01      last obs. used      2020-02-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .517      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 22:14:03   Additional Information  Earth MOID = 4.01089 au   Jupiter MOID = .105763 au   T_jup = 2.996  [ 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 11.7   n/a MPO296281   diameter diameter 17.399 km 0.738 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   rotation period rot_per 9.81 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: [French, L.M.; Stephens, R.D.; Coley, D.; Wasserman, L.; Sieben, J. (2015) Icarus 254, 1-17.] geometric albedo albedo 0.134   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   17874 (1998 YM3)          Discovered 1998-Dec-17 by Kobayashi, T. at Oizumi Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1998 YM3 = 2000 DG83  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-08 04:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin