+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04678587052800394 5.1739e-08   a 3.182063955581279 1.8796e-08 au q 3.033188323343625 1.6347e-07 au i 16.21933136570667 5.6282e-06 deg node 353.4600448170074 1.3212e-05 deg peri 173.3130234734243 4.5413e-05 deg M 28.07382980184838 4.2064e-05 deg tp 2458838.818270913425 (2019-Dec-21.31827091) 0.00024245 TDB period 2073.298259695751 5.68 1.837e-05 5.029e-08 d yr n .1736363778421483 1.5384e-09 deg/d Q 3.330939587818933 1.9675e-08 au   Orbit Determination Parameters    # obs. used (total)      2090      data-arc span      21815 days (59.73 yr)      first obs. used      1960-09-24      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4359      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 18:20:09   Additional Information  Earth MOID = 2.03963 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 12.1   n/a MPO395178   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. 2019-August); 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 ] 2020-Aug-10 03:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin