+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   29981 (1999 TD10) Classification: TransNeptunian Object          SPK-ID: 2029981 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .872303704741866 2.6323e-05   a 95.68764814471012 0.020216 au q 12.21895817004334 6.4334e-05 au i 5.961384158859448 4.081e-05 deg node 184.6276793775696 0.00016969 deg peri 172.3268279839077 0.00054091 deg M 7.919026827660589 0.0025255 deg tp 2451479.916093898833 (1999-Oct-28.41609390) 0.016306 TDB period 341886.7324378333 936.03 108.34 0.2966 d yr n .001052980317291079 3.3369e-07 deg/d Q 179.1563381193769 0.03785 au   Orbit Determination Parameters    # obs. used (total)      219      data-arc span      4408 days (12.07 yr)      first obs. used      1997-09-05      last obs. used      2009-09-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      2      norm. resid. RMS      .44792      source      ORB      producer      Otto Matic      solution date      2017-Apr-05 21:28:09   Additional Information  Earth MOID = 11.2152 au   Jupiter MOID = 7.26056 au   T_jup = 4.225  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 8.7   n/a MPO181526   rotation period rot_per 15.382 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Choi, Y.J.; Brosch, N.; Prialnik, D. (2003) Icarus 165, 101-111.] [Ortiz, J.L.; Gutierrez, P.J.; Casanova, V.; Sota, A. (2003) Astron. Astrophys. 407, 1149-1155.] [Rousselot, P.; Petit, J.-M.; Poulet, F.; Lacerda, P.; Ortiz, J. (2003) Astron. Astrophys. 407, 1139-1147.] [Mueller, B.E.A.; Hergenrother, C.W.; Samarasinha, N.H.; Campins, H.; McCarthy Jr.; D.W. (2004) Icarus 171, 506-515.] [Rabinowitz, D.L.; Schaefer, B.E.; Tourtellotte, S.W. (2007) Astron. J. 133, 26-43.] 29981 (1999 TD10)          Discovered 1999-Oct-03 by Spacewatch at Kitt Peak Reference: 20011002/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2020-Oct-27 10:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin