+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17442 (1989 UO5) Classification: Jupiter Trojan          SPK-ID: 2017442 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04663768283677217 7.1498e-08   a 5.242948634660419 1.0209e-07 au q 4.998429659107639 4.073e-07 au i 15.76504400232052 8.1792e-06 deg node 31.35366225432442 1.7393e-05 deg peri 323.1134589214315 7.341e-05 deg M 237.4951708225062 7.5346e-05 deg tp 2460692.650193472836 (2025-Jan-17.15019347) 0.00093902 TDB period 4384.921584372192 12.01 0.00012807 3.506e-07 d yr n .08209952973458765 2.3979e-09 deg/d Q 5.487467610213201 1.0685e-07 au   Orbit Determination Parameters    # obs. used (total)      917      data-arc span      17004 days (46.55 yr)      first obs. used      1974-07-24      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53028      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:03:19   Additional Information  Earth MOID = 4.00779 au   Jupiter MOID = .00945402 au   T_jup = 2.922  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.8   n/a MPO365462   diameter diameter 23.374 km 0.570 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   geometric albedo albedo 0.081   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   17442 (1989 UO5)          Discovered 1989-Oct-30 by Bus, S. J. at Cerro Tololo Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 UO5 = 1977 UK5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 18:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin