+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70658 (1999 TZ260) Classification: Main-belt Asteroid          SPK-ID: 2070658 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2243760064187322 3.8487e-08   a 2.365534848149002 1.2251e-08 au q 1.834765585876987 9.1079e-08 au i 2.687400066704634 5.1282e-06 deg node 159.5262744255566 8.201e-05 deg peri 151.9306865433603 8.3007e-05 deg M 261.5584019698541 1.7624e-05 deg tp 2459363.886347421428 (2021-May-29.38634742) 6.7311e-05 TDB period 1328.900461689512 3.64 1.0323e-05 2.826e-08 d yr n .270900650860118 2.1045e-09 deg/d Q 2.896304110421017 1.5e-08 au   Orbit Determination Parameters    # obs. used (total)      728      data-arc span      7618 days (20.86 yr)      first obs. used      1999-07-13      last obs. used      2020-05-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57858      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 21:59:44   Additional Information  Earth MOID = .821081 au   Jupiter MOID = 2.38745 au   T_jup = 3.512  [ 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 15.9   n/a MPO267921   diameter diameter 1.473 km 0.309 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.427   0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70658 (1999 TZ260)          Discovered 1999-Oct-13 by Spacewatch at Kitt Peak Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 TZ260 = 2000 YY20  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-27 01:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin