+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11587 (1994 UH2) Classification: Main-belt Asteroid          SPK-ID: 2011587 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2043982487201787 4.1156e-08   a 3.150638843872929 1.6896e-08 au q 2.506653781835534 1.3318e-07 au i 3.126870602395468 4.267e-06 deg node 64.4430894608041 7.4587e-05 deg peri 307.80245956 7.5106e-05 deg M 228.2619494398789 1.1452e-05 deg tp 2459747.989494393582 (2022-Jun-17.48949439) 6.8675e-05 TDB period 2042.661302771309 5.59 1.6431e-05 4.499e-08 d yr n .1762406716725787 1.4177e-09 deg/d Q 3.794623905910325 2.0349e-08 au   Orbit Determination Parameters    # obs. used (total)      1816      data-arc span      11632 days (31.85 yr)      first obs. used      1988-09-16      last obs. used      2020-07-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50137      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:58:34   Additional Information  Earth MOID = 1.5086 au   Jupiter MOID = 1.67096 au   T_jup = 3.173  [ 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 13.1   n/a MPO395112   diameter diameter 14.048 km 0.173 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.071   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   11587 (1994 UH2)          Discovered 1994-Oct-31 by Ueda, S., Kaneda, H. at Kushiro Reference: 19990928/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1994 UH2 = 1988 SR3 = 1997 JS18  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-15 19:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin