+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   173028 (2006 QP18) Classification: Main-belt Asteroid          SPK-ID: 2173028 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08519084043373847 5.5109e-08   a 3.046793035527822 2.8076e-08 au q 2.787234176203546 1.7496e-07 au i 11.01015889472158 7.1819e-06 deg node 29.05934089011305 2.6663e-05 deg peri 200.9664351743407 4.769e-05 deg M 306.8623583168927 4.1572e-05 deg tp 2459287.223066875944 (2021-Mar-13.72306688) 0.00022577 TDB period 1942.508188280289 5.32 2.685e-05 7.351e-08 d yr n .1853274041118507 2.5617e-09 deg/d Q 3.306351894852098 3.0468e-08 au   Orbit Determination Parameters    # obs. used (total)      466      data-arc span      10398 days (28.47 yr)      first obs. used      1991-11-09      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59811      source      ORB      producer      Otto Matic      solution date      2020-May-21 03:23:28   Additional Information  Earth MOID = 1.78087 au   Jupiter MOID = 1.67988 au   T_jup = 3.205  [ 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 15.1   n/a MPO427055   diameter diameter 3.065 km 0.660 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.171   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   173028 (2006 QP18)          Discovered 2006-Aug-17 by NEAT at Palomar Reference: 20071224/Numbers.arc Last Updated: 2007-12-22 [ show close-approach data ] Alternate Designations  2006 QP18 = 2005 CG77 = 2007 TC216  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-12 10:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin