+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18219 (6260 P-L) Classification: Main-belt Asteroid          SPK-ID: 2018219 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0466215253884084 2.0544e-08   a 3.181671171127727 1.7388e-08 au q 3.033336807845429 6.7608e-08 au i 16.21984713782021 5.5252e-07 deg node 353.4611315244309 3.6006e-06 deg peri 173.3037687380179 1.7542e-05 deg M 62.82540601803069 1.8184e-05 deg tp 2458838.745310761408 (2019-Dec-21.24531076) 0.00010377 TDB period 2072.914388941903 5.68 1.6993e-05 4.652e-08 d yr n .1736685325358555 1.4237e-09 deg/d Q 3.330005534410025 1.8199e-08 au   Orbit Determination Parameters    # obs. used (total)      2163      data-arc span      22054 days (60.38 yr)      first obs. used      1960-09-24      last obs. used      2021-02-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43423      source      ORB      producer      Otto Matic      solution date      2021-Mar-17 01:51:46   Additional Information  Earth MOID = 2.03942 au   Jupiter MOID = 1.64 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 12.14   n/a E2021B10   diameter diameter 22.669 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 4.710 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Clark, M. (2015) Minor Planet Bull. 42, 15-20.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] geometric albedo albedo 0.064   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18219 (6260 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  6260 P-L = 1994 SQ  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 15:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin