+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5382 McKay (1991 JR2) Classification: Main-belt Asteroid          SPK-ID: 2005382 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09290818006314386 5.0082e-08   a 2.627887474272787 1.0897e-08 au q 2.383735231627371 1.3571e-07 au i 12.79171586497869 4.4117e-06 deg node 169.0640164866158 1.5412e-05 deg peri 10.97713609423876 2.4673e-05 deg M 24.76515792552713 1.9001e-05 deg tp 2459093.459735103482 (2020-Aug-31.95973510) 8.2033e-05 TDB period 1555.996350947006 4.26 9.6781e-06 2.65e-08 d yr n .2313630104472275 1.439e-09 deg/d Q 2.872039716918204 1.1909e-08 au   Orbit Determination Parameters    # obs. used (total)      2402      data-arc span      17995 days (49.27 yr)      first obs. used      1971-10-13      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4345      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:24:21   Additional Information  Earth MOID = 1.38859 au   Jupiter MOID = 2.08849 au   T_jup = 3.360  [ 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 12.59   n/a E2021B10   diameter diameter 10.281 km 0.819 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 21.486 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: [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] geometric albedo albedo 0.183   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   5382 McKay           Discovered 1991 May 8 by R. H. McNaught at Siding Spring. Named for Christopher P. McKay (b. 1954), space scientist and exobiologist at NASA-Ames Research Center. McKay has made numerous seminal contributions to planetary science and the search for zones of life in the solar system, with a special interest in Mars, Titan, comets and microbial life in hostile environments on the earth. Name suggested and citation prepared by D. I. Steel. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19980411/MPCPages.arc Last Updated: 2009-11-17 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2013-Jul-14 08:58 < 00:01 Juno 0.0144966258138755 0.0144953961922842 0.0144978554425983 5.93234855522146 5.93234841375535 2456487.873482873 0.217355144182081 73.8756404921261 56.472221849472 59.9939970989978 36333.5041123645 T 36 CATAB v2.0f-lin.ifort 2021-Feb-24 01:24:26 2021-Feb-24 01:24 Alternate Designations  1991 JR2 = 1952 DK1 = 1971 TK2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-04 03:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin