+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08503780079467541 5.3536e-08   a 3.046093043275402 2.6733e-08 au q 2.787059989859302 1.6851e-07 au i 11.01124611063825 7.0966e-06 deg node 29.05686618385225 2.6089e-05 deg peri 201.0746335920656 4.5929e-05 deg M 343.8312289795628 3.9358e-05 deg tp 2459287.714296895180 (2021-Mar-14.21429690) 0.00021265 TDB period 1941.838797925882 5.32 2.5563e-05 6.999e-08 d yr n .185391290144436 2.4405e-09 deg/d Q 3.305126096691502 2.9006e-08 au   Orbit Determination Parameters    # obs. used (total)      478      data-arc span      10687 days (29.26 yr)      first obs. used      1991-11-09      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .59784      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 20:55:21   Additional Information  Earth MOID = 1.77951 au   Jupiter MOID = 1.68012 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 15.24   n/a E2021B55   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 ] 2021-Jun-15 02:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin