+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101545 (1998 YH23) Classification: Main-belt Asteroid          SPK-ID: 2101545 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .25562157315883 4.5168e-08   a 2.416391524571865 8.1524e-09 au q 1.798709721693141 1.1172e-07 au i 5.01744801432036 3.8891e-06 deg node 67.96812327834019 5.6226e-05 deg peri 279.9384455092071 5.6857e-05 deg M 319.8794994230511 7.8831e-06 deg tp 2459153.402020646090 (2020-Oct-30.90202065) 3.0238e-05 TDB period 1371.985061029328 3.76 6.9432e-06 1.901e-08 d yr n .2623935276160449 1.3279e-09 deg/d Q 3.034073327450588 1.0236e-08 au   Orbit Determination Parameters    # obs. used (total)      771      data-arc span      11061 days (30.28 yr)      first obs. used      1990-07-30      last obs. used      2020-11-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51555      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:28:43   Additional Information  Earth MOID = .800685 au   Jupiter MOID = 2.40869 au   T_jup = 3.466  [ 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 15.7   n/a MPO325163   diameter diameter 1.680 km 0.262 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.360   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101545 (1998 YH23)          Discovered 1998-Dec-16 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 YH23 = 1990 OR2 = 2003 AM48  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 13:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin