+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0464674502516357 2.0556e-08   a 3.18213379790072 1.7142e-08 au q 3.03426815395272 6.7565e-08 au i 16.2197716068341 5.5239e-07 deg node 353.4582528048442 3.6001e-06 deg peri 173.5180855657854 1.7572e-05 deg M 96.66881022894626 1.8288e-05 deg tp 2458839.750348303703 (2019-Dec-22.25034830) 0.00010388 TDB period 2073.366519521419 5.68 1.6754e-05 4.587e-08 d yr n .1736306613473706 1.403e-09 deg/d Q 3.329999441848721 1.7939e-08 au   Orbit Determination Parameters    # obs. used (total)      2200      data-arc span      22184 days (60.74 yr)      first obs. used      1960-09-24      last obs. used      2021-06-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4352      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 04:35:09   Additional Information  Earth MOID = 2.04146 au   Jupiter MOID = 1.63925 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-Jul-31 16:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin