+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   173129 (1994 JH2) Classification: Main-belt Asteroid          SPK-ID: 2173129 [ 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 .2262461258188482 4.397e-08   a 2.459176124692835 1.5598e-08 au q 1.902797053774872 1.0348e-07 au i 16.14437913441882 5.3088e-06 deg node 51.01312799019721 1.4864e-05 deg peri 266.3740724393194 2.0767e-05 deg M 209.3793671923931 1.8539e-05 deg tp 2459589.838542391035 (2022-Jan-10.33854239) 7.6512e-05 TDB period 1408.584410422538 3.86 1.3401e-05 3.669e-08 d yr n .2555757378374006 2.4315e-09 deg/d Q 3.015555195610798 1.9127e-08 au   Orbit Determination Parameters    # obs. used (total)      804      data-arc span      9410 days (25.76 yr)      first obs. used      1994-05-01      last obs. used      2020-02-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53279      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 16:59:26   Additional Information  Earth MOID = .970046 au   Jupiter MOID = 2.46724 au   T_jup = 3.402  [ 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 15.5   n/a MPO266538   diameter diameter 4.936 km 0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.036   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   173129 (1994 JH2)          Discovered 1994-May-01 by Spacewatch at Kitt Peak Reference: 20080122/Numbers.arc Last Updated: 2008-01-28 [ show close-approach data ] Alternate Designations  1994 JH2 = 2003 YY10  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-07 01:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin