+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70535 (1999 TU121) Classification: Main-belt Asteroid          SPK-ID: 2070535 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1294489962630237 3.6118e-08   a 2.406342427086671 9.1115e-09 au q 2.094843815235174 8.7198e-08 au i 6.971495840083395 5.1072e-06 deg node 12.90035489684468 2.5046e-05 deg peri 68.70219985567626 3.2084e-05 deg M 138.759570162489 2.0553e-05 deg tp 2458474.973023277425 (2018-Dec-22.47302328) 7.6404e-05 TDB period 1363.435411327549 3.73 7.7439e-06 2.12e-08 d yr n .2640389101009745 1.4997e-09 deg/d Q 2.717841038938169 1.0291e-08 au   Orbit Determination Parameters    # obs. used (total)      1578      data-arc span      9154 days (25.06 yr)      first obs. used      1995-05-26      last obs. used      2020-06-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52622      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 23:36:14   Additional Information  Earth MOID = 1.12207 au   Jupiter MOID = 2.5132 au   T_jup = 3.501  [ 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 14.7   n/a MPO366061   diameter diameter 2.497 km 0.509 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.341   0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70535 (1999 TU121)          Discovered 1999-Oct-04 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 TU121 = 2001 DR59  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-29 12:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin