+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102405 (1999 TP172) Classification: Mars-crossing Asteroid          SPK-ID: 2102405 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3018074067537351 6.3511e-08   a 2.292517268788251 7.4365e-09 au q 1.600618576957114 1.4411e-07 au i 1.765128598912003 4.2098e-06 deg node 172.051876993255 0.00017628 deg peri 209.957240310965 0.00017653 deg M 41.11928754794889 1.2967e-05 deg tp 2459055.686039557938 (2020-Jul-25.18603956) 4.5158e-05 TDB period 1267.848468880947 3.47 6.169e-06 1.689e-08 d yr n .2839456045703553 1.3816e-09 deg/d Q 2.984415960619388 9.6809e-09 au   Orbit Determination Parameters    # obs. used (total)      598      data-arc span      12909 days (35.34 yr)      first obs. used      1985-09-15      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52677      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:31:21   Additional Information  Earth MOID = .602688 au   Jupiter MOID = 2.47504 au   T_jup = 3.535  [ 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 16.3   n/a MPO266358   rotation period rot_per 4.329 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.] 102405 (1999 TP172)          Discovered 1999-Oct-10 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 TP172 = 1985 RO5 = 1985 SZ3 = 2000 AP100  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-09 01:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin