+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160517 (1994 TB4) Classification: Main-belt Asteroid          SPK-ID: 2160517 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2145598059027157 4.8422e-08   a 2.699616177787712 1.3784e-08 au q 2.120387054669749 1.3285e-07 au i 1.966805000262185 5.4453e-06 deg node 189.0754329688461 0.00013191 deg peri 184.3911914509567 0.00013237 deg M 325.9737466561203 1.274e-05 deg tp 2459353.630990048027 (2021-May-19.13099005) 5.8111e-05 TDB period 1620.135953851802 4.44 1.2409e-05 3.397e-08 d yr n .222203574424798 1.7019e-09 deg/d Q 3.278845300905674 1.6742e-08 au   Orbit Determination Parameters    # obs. used (total)      481      data-arc span      9423 days (25.80 yr)      first obs. used      1994-10-02      last obs. used      2020-07-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .58356      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 20:01:41   Additional Information  Earth MOID = 1.11957 au   Jupiter MOID = 2.18688 au   T_jup = 3.334  [ 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 16.15   n/a E2021B55   diameter diameter 3.302 km 0.750 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   geometric albedo albedo 0.054   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   160517 (1994 TB4)          Discovered 1994-Oct-02 by Spacewatch at Kitt Peak Reference: 20070828/Numbers.arc Last Updated: 2007-08-30 [ show close-approach data ] Alternate Designations  1994 TB4 = 2003 SU201  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-17 05:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin