+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70490 (1999 TT55) Classification: Main-belt Asteroid          SPK-ID: 2070490 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .130275606027541 4.6409e-08   a 2.659965905979134 1.6275e-08 au q 2.313437235565105 1.1884e-07 au i 14.23137396126762 5.7019e-06 deg node 24.02370838748623 1.5689e-05 deg peri 210.2305595143482 2.6059e-05 deg M 58.37532409976218 1.845e-05 deg tp 2458743.555493976364 (2019-Sep-17.05549398) 8.1518e-05 TDB period 1584.574023271005 4.34 1.4543e-05 3.982e-08 d yr n .2271903961020761 2.0851e-09 deg/d Q 3.006494576393162 1.8396e-08 au   Orbit Determination Parameters    # obs. used (total)      755      data-arc span      10077 days (27.59 yr)      first obs. used      1993-03-17      last obs. used      2020-10-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5358      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:00:25   Additional Information  Earth MOID = 1.31451 au   Jupiter MOID = 2.00489 au   T_jup = 3.330  [ 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 15.0   n/a MPO474583   diameter diameter 2.572 km 0.470 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.352   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70490 (1999 TT55)          Discovered 1999-Oct-06 by Spacewatch at Kitt Peak Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 TT55 = 1993 FF14  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-27 21:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin