+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   152810 (1999 TJ241) Classification: Main-belt Asteroid          SPK-ID: 2152810 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1141664222983091 4.0832e-08   a 3.120666817721398 2.6603e-08 au q 2.764391451957096 1.3584e-07 au i 12.07107816348617 4.5817e-06 deg node 170.4993223951531 1.9298e-05 deg peri 227.523558894298 2.7557e-05 deg M 300.5271607718158 2.1965e-05 deg tp 2459533.148602239403 (2021-Nov-14.64860224) 0.00012481 TDB period 2013.582979395306 5.51 2.5748e-05 7.049e-08 d yr n .1787857782290704 2.2861e-09 deg/d Q 3.476942183485699 2.964e-08 au   Orbit Determination Parameters    # obs. used (total)      676      data-arc span      8900 days (24.37 yr)      first obs. used      1996-03-11      last obs. used      2020-07-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55335      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:28:46   Additional Information  Earth MOID = 1.78511 au   Jupiter MOID = 2.03663 au   T_jup = 3.172  [ 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 14.95   n/a E2021B55   diameter diameter 4.292 km 0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.139   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   152810 (1999 TJ241)          Discovered 1999-Oct-04 by CSS at Catalina Reference: 20070402/Numbers.arc Last Updated: 2007-04-04 Alternate Designations  1999 TJ241 = 2002 GO77  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-14 05:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin