+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2044369846997006 4.0176e-08   a 3.153417319215335 1.6331e-08 au q 2.508742190975139 1.3109e-07 au i 3.125647726085015 4.1475e-06 deg node 64.43434573281606 7.3079e-05 deg peri 307.5561188204445 7.3603e-05 deg M 298.302583265168 1.155e-05 deg tp 2459747.037979804423 (2022-Jun-16.53797980) 6.7306e-05 TDB period 2045.363961865007 5.60 1.5889e-05 4.35e-08 d yr n .1760077945598221 1.3672e-09 deg/d Q 3.798092447455531 1.9669e-08 au   Orbit Determination Parameters    # obs. used (total)      1898      data-arc span      11967 days (32.76 yr)      first obs. used      1988-09-16      last obs. used      2021-06-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49799      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 02:44:36   Additional Information  Earth MOID = 1.50983 au   Jupiter MOID = 1.66944 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-Aug-03 18:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin