+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16029 (1999 DQ6) Classification: Main-belt Asteroid          SPK-ID: 2016029 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1689923487958409 4.5323e-08   a 3.14146670647439 1.7729e-08 au q 2.610582869083348 1.4668e-07 au i 15.15094209423846 5.0042e-06 deg node 175.6006869888369 1.4215e-05 deg peri 346.2479970345764 1.792e-05 deg M 339.4556063019462 1.2024e-05 deg tp 2459116.561437998576 (2020-Sep-24.06143800) 6.8358e-05 TDB period 2033.747906780311 5.57 1.7216e-05 4.713e-08 d yr n .1770130893803485 1.4984e-09 deg/d Q 3.672350543865431 2.0725e-08 au   Orbit Determination Parameters    # obs. used (total)      2205      data-arc span      25059 days (68.61 yr)      first obs. used      1951-09-08      last obs. used      2020-04-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44767      source      ORB      producer      Otto Matic      solution date      2020-May-20 04:18:38   Additional Information  Earth MOID = 1.62051 au   Jupiter MOID = 1.31686 au   T_jup = 3.135  [ 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 12.2   n/a MPO502292   diameter diameter 20.707 km 0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 5.95 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Hess, K.; Bruner, M.; Ditteon, R. (2017) Minor Planet Bull. 44, 3-5.] [Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.] geometric albedo albedo 0.068   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   16029 (1999 DQ6)          Discovered 1999-Feb-20 by LINEAR at Socorro Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 DQ6 = 1971 HW  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-15 03:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin