+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2898769775300085 3.8259e-08   a 2.270115627697254 8.6214e-09 au q 1.612061370896736 8.7191e-08 au i 6.73123907563664 4.744e-06 deg node 138.8068876175104 2.833e-05 deg peri 163.5475572855991 2.9349e-05 deg M 322.1356916792068 7.9987e-06 deg tp 2459331.900773451596 (2021-Apr-27.40077345) 2.818e-05 TDB period 1249.310512734161 3.42 7.1169e-06 1.949e-08 d yr n .2881589455387892 1.6415e-09 deg/d Q 2.928169884497772 1.1121e-08 au   Orbit Determination Parameters    # obs. used (total)      1104      data-arc span      10890 days (29.82 yr)      first obs. used      1990-07-27      last obs. used      2020-05-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55551      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:03:55   Additional Information  Earth MOID = .596231 au   Jupiter MOID = 2.33432 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 15.48   n/a E2021B10   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. 2020-October); 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 ] 2021-Apr-14 10:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin