+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15609 Kosmaczewski (2000 GP124) Classification: Mars-crossing Asteroid          SPK-ID: 2015609 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2898067780466502 3.8325e-08   a 2.270261733414495 8.8908e-09 au q 1.612324495131037 8.7248e-08 au i 6.73111864546911 4.7701e-06 deg node 138.8062559711914 2.9452e-05 deg peri 163.5299297235002 3.0509e-05 deg M 264.5169444622051 7.8421e-06 deg tp 2459331.887503898575 (2021-Apr-27.38750390) 2.8234e-05 TDB period 1249.431123999429 3.42 7.3396e-06 2.009e-08 d yr n .2881311287073113 1.6926e-09 deg/d Q 2.928198971697953 1.1467e-08 au   Orbit Determination Parameters    # obs. used (total)      1002      data-arc span      10781 days (29.52 yr)      first obs. used      1990-07-27      last obs. used      2020-02-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56571      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 21:22:14   Additional Information  Earth MOID = .598479 au   Jupiter MOID = 2.33454 au   T_jup = 3.548  [ 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 15.4   n/a MPO412299   diameter diameter 4.742 km 0.927 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   rotation period rot_per 5.22 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Clark, M. (2015) Minor Planet Bull. 42, 15-20.] geometric albedo albedo 0.069   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   15609 Kosmaczewski           Discovered 2000 Apr. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Named in honor of Sara G. Kosmaczewski for achievement as a finalist in the 2001 Discovery Young Scientist Challenge (DYSC), a middle school science competition. Sara is a student at the St. Rita School, Hamden, Connecticut. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20011002/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] Alternate Designations  2000 GP124 = 1990 ON3 = 1997 RO10  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-27 09:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin