+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160605 (1999 TT12) Classification: Main-belt Asteroid          SPK-ID: 2160605 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2144376889784425 5.4079e-08   a 2.597813583573541 1.1274e-08 au q 2.040744442315225 1.4102e-07 au i 15.7881469295602 6.7905e-06 deg node 29.73772711536795 1.2032e-05 deg peri 324.0271686581208 1.7882e-05 deg M 30.85079616177855 1.0688e-05 deg tp 2459069.438758555747 (2020-Aug-07.93875856) 4.5505e-05 TDB period 1529.362376014962 4.19 9.9558e-06 2.726e-08 d yr n .2353922168126346 1.5324e-09 deg/d Q 3.154882724831858 1.3692e-08 au   Orbit Determination Parameters    # obs. used (total)      673      data-arc span      7791 days (21.33 yr)      first obs. used      1999-09-13      last obs. used      2021-01-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43022      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 11:02:02   Additional Information  Earth MOID = 1.0565 au   Jupiter MOID = 2.35361 au   T_jup = 3.331  [ 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 15.90   n/a E2021B55   160605 (1999 TT12)          Discovered 1999-Oct-12 by Klet at Klet Reference: 20070828/Numbers.arc Last Updated: 2007-08-30 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 12:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin