+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2044009934386265 4.1086e-08   a 3.151392460897723 1.6761e-08 au q 2.507244711175231 1.3308e-07 au i 3.126561562490565 4.2117e-06 deg node 64.44325101392694 7.4582e-05 deg peri 307.7223717960278 7.5095e-05 deg M 263.6048815154795 1.1604e-05 deg tp 2459747.647860261161 (2022-Jun-17.14786026) 6.8604e-05 TDB period 2043.394238118485 5.59 1.6302e-05 4.463e-08 d yr n .1761774567454396 1.4055e-09 deg/d Q 3.795540210620216 2.0187e-08 au   Orbit Determination Parameters    # obs. used (total)      1827      data-arc span      11632 days (31.85 yr)      first obs. used      1988-09-16      last obs. used      2020-07-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50174      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 22:51:48   Additional Information  Earth MOID = 1.50772 au   Jupiter MOID = 1.67116 au   T_jup = 3.172  [ 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 13.16   n/a E2021B10   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-Apr-19 20:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin