+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   27085 (1998 UA1) Classification: Main-belt Asteroid          SPK-ID: 2027085 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1733011128298831 3.3347e-08   a 2.309330101620198 5.719e-09 au q 1.909120625117871 7.79e-08 au i 4.861459188884984 4.138e-06 deg node 49.58254575280748 4.3289e-05 deg peri 15.22962783111794 4.5448e-05 deg M 34.1882418317502 1.2569e-05 deg tp 2458878.768851861666 (2020-Jan-30.26885186) 4.4718e-05 TDB period 1281.821204654701 3.51 4.7616e-06 1.304e-08 d yr n .2808504015167835 1.0433e-09 deg/d Q 2.709539578122526 6.7101e-09 au   Orbit Determination Parameters    # obs. used (total)      1412      data-arc span      14532 days (39.79 yr)      first obs. used      1980-07-12      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52126      source      ORB      producer      Otto Matic      solution date      2020-May-20 06:08:08   Additional Information  Earth MOID = .922966 au   Jupiter MOID = 2.60008 au   T_jup = 3.561  [ hide covariance matrix ] Orbital Elements at Epoch 2456805.5 (2014-May-28.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1727728289881295 3.3352e-08   q 1.910114855917611 7.7856e-08 au tp 2456313.159133088717 (2013-Jan-20.65913309) 4.5263e-05 TDB node 49.60917682934628 4.3273e-05 deg peri 14.79370889475749 4.5464e-05 deg i 4.863499084115655 4.1396e-06 deg   Orbit Determination Parameters    # obs. used (total)      1412      data-arc span      14532 days (39.79 yr)      first obs. used      1980-07-12      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52126      source      ORB      producer      Otto Matic      solution date      2020-May-20 06:08:08   Additional Information  Jupiter MOID = 2.60008 au   T_jup = 3.561  Orbit Covariance (6×6)   e q tp node peri i e 1.112323401147119E-15 -2.591963426202785E-15 -5.115797506666729E-13 -7.981961537694134E-15 -1.440346222060411E-13 -2.429165721186254E-16 q -2.591963426202785E-15 6.06150077719169E-15 1.157256126781417E-12 1.82712005554086E-14 3.279154205150749E-13 6.745089205485959E-16 tp -5.115797506666729E-13 1.157256126781417E-12 2.048746100444342E-9 1.039121212253383E-11 6.415819965711656E-10 -1.102431786342965E-12 node -7.981961537694134E-15 1.82712005554086E-14 1.039121212253383E-11 1.872523535844896E-9 -1.862045179549719E-9 -5.409039928382513E-11 peri -1.440346222060411E-13 3.279154205150749E-13 6.415819965711656E-10 -1.862045179549719E-9 2.067001030884045E-9 5.355706127917361E-11 i -2.429165721186254E-16 6.745089205485959E-16 -1.102431786342965E-12 -5.409039928382513E-11 5.355706127917361E-11 1.713644385970725E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.0   n/a MPO416979   diameter diameter 3.551 km 0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.128   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   27085 (1998 UA1)          Discovered 1998-Oct-19 by Stafford, T. at Zeno Reference: 20010804/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-14 06:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin