+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   13539 (1991 TY) Classification: Main-belt Asteroid          SPK-ID: 2013539 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .293524208920209 3.8544e-08   a 2.401438348421001 8.2327e-09 au q 1.696558056930074 9.3886e-08 au i 23.15230922106318 3.8474e-06 deg node 126.6674570109459 1.0279e-05 deg peri 240.2435424202638 1.1302e-05 deg M 307.5243500276013 6.4737e-06 deg tp 2459398.634870325035 (2021-Jul-03.13487033) 2.4949e-05 TDB period 1359.269553679284 3.72 6.9898e-06 1.914e-08 d yr n .2648481303988223 1.3619e-09 deg/d Q 3.106318639911929 1.0649e-08 au   Orbit Determination Parameters    # obs. used (total)      1297      data-arc span      16066 days (43.99 yr)      first obs. used      1976-08-24      last obs. used      2020-08-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5017      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:00:19   Additional Information  Earth MOID = .783482 au   Jupiter MOID = 2.5638 au   T_jup = 3.361  [ 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 14.80   n/a E2021B10   13539 (1991 TY)          Discovered 1991-Oct-02 by McNaught, R. H. at Siding Spring Reference: 20000222/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 09:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin