+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1688193025178951 1.2997e-08   a 3.140840742840554 1.5012e-08 au q 2.610606199314424 3.9313e-08 au i 15.15244745503684 6.0536e-07 deg node 175.5983566797005 1.7514e-06 deg peri 346.2277948911412 6.594e-06 deg M 14.87798902541748 5.2426e-06 deg tp 2459116.474900768377 (2020-Sep-23.97490077) 2.9275e-05 TDB period 2033.140075026731 5.57 1.4576e-05 3.991e-08 d yr n .1770660095789351 1.2694e-09 deg/d Q 3.671075286366684 1.7546e-08 au   Orbit Determination Parameters    # obs. used (total)      2464      data-arc span      25391 days (69.52 yr)      first obs. used      1951-09-08      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .44329      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:16:55   Additional Information  Earth MOID = 1.62026 au   Jupiter MOID = 1.31722 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 12.21   n/a E2021B10   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. 2020-October); 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.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] 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 ] 2021-Apr-20 14:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin