+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4419 Allancook (1932 HD) Classification: Main-belt Asteroid          SPK-ID: 2004419 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2154091743445575 3.4067e-08   a 3.055036268170193 1.3981e-08 au q 2.396953428050974 1.0381e-07 au i .4098669800107332 3.1302e-06 deg node 231.7176622278346 0.00055064 deg peri 295.482990134954 0.00055069 deg M 190.6116599790062 9.4211e-06 deg tp 2459918.206892881078 (2022-Dec-04.70689288) 5.5253e-05 TDB period 1950.396830125627 5.34 1.3388e-05 3.665e-08 d yr n .1845778225433293 1.267e-09 deg/d Q 3.713119108289412 1.6992e-08 au   Orbit Determination Parameters    # obs. used (total)      2687      data-arc span      32339 days (88.54 yr)      first obs. used      1932-04-24      last obs. used      2020-11-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46911      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:17:23   Additional Information  Earth MOID = 1.40394 au   Jupiter MOID = 1.26563 au   T_jup = 3.200  [ 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 12.5   n/a MPO309183   rotation period rot_per 5.2750 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Odden, C.; French, J.; Briggs, J. (2012) Minor Planet Bull. 39, 236-238.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] 4419 Allancook (1932 HD)          Discovered 1932-Apr-24 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ 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 1940-Dec-05 11:47 00:02 Jupiter 1.75441536568283 1.75441350345967 1.75441722790139 1.93819357414868 1.67063007414016 2429968.990632770 1.97859239444074 84.4688654283617 35.4140653258038 -39.9807354860408 744454.578919008 T 34 CATAB v2.0f-lin.ifort 2020-Dec-18 02:17:31 2020-Dec-18 02:17 1950-Mar-31 02:24 00:02 Jupiter 1.45046151628948 1.45046019764367 1.45046283493554 0.5958040822673 n/a 2433371.600159841 1.75108036286674 116.530122112011 62.4842807278071 -77.9813374721755 3417445.18818534 F 34 CATAB v2.0f-lin.ifort 2020-Dec-18 02:17:31 2020-Dec-18 02:17 1999-Mar-03 10:58 < 00:01 Jupiter 1.32965593464214 1.32965546470201 1.32965640458234 0.302647599813697 n/a 2451240.956882163 0.45746375568133 37.7723153680714 20.6006311861821 -69.3408701073432 9220432.17442971 F 34 CATAB v2.0f-lin.ifort 2020-Dec-18 02:17:31 2020-Dec-18 02:17 2008-Jul-01 02:39 < 00:01 Jupiter 1.9406160698214 1.94061566530403 1.94061647433867 2.38187830578708 2.19098206019074 2454648.610427586 0.245955927270135 34.9397888607347 8.16335702166617 -89.0665213621912 2882449.01863887 T 34 CATAB v2.0f-lin.ifort 2020-Dec-18 02:17:31 2020-Dec-18 02:17 2048-Apr-28 12:21 < 00:01 Jupiter 1.99818834154963 1.99818773051635 1.99818895258279 3.10535980623196 2.96571560621852 2469195.014665779 0.757370340785637 36.5950805081261 19.8378790337486 78.5750715380817 2384872.75625105 T 34 CATAB v2.0f-lin.ifort 2020-Dec-18 02:17:31 2020-Dec-18 02:17 2057-Aug-22 22:10 00:01 Jupiter 1.29938319096222 1.29938266068458 1.29938372124046 0.207827396405184 n/a 2472598.423649765 1.01487757671765 393.363251605058 26.2731833093988 -89.5634529688766 7395664.21385534 F 34 CATAB v2.0f-lin.ifort 2020-Dec-18 02:17:31 2020-Dec-18 02:17 2106-Aug-08 13:22 00:03 Jupiter 1.51710318339968 1.51710139090213 1.51710497589895 0.936493652305512 n/a 2490480.056656086 2.57024974308483 122.675090784388 25.7733772399075 -44.4706509660765 6305821.15961971 F 34 CATAB v2.0f-lin.ifort 2020-Dec-18 02:17:31 2020-Dec-18 02:17 2115-Dec-01 06:46 00:03 Jupiter 1.68904846335916 1.68904616948744 1.68905075724384 1.37897204095403 0.947948139338643 2493881.782007615 2.74675039139008 917.639519667789 74.1159541586494 31.0649984601336 2401045.36329992 T 34 CATAB v2.0f-lin.ifort 2020-Dec-18 02:17:31 2020-Dec-18 02:17 2164-Dec-19 13:12 00:03 Jupiter 1.26304520592733 1.26304483068668 1.2630455811692 0.133627179895529 n/a 2511798.049726717 3.05305215842308 145.821198583116 16.9211776705459 -86.8385250696214 11145411.2185989 F 34 CATAB v2.0f-lin.ifort 2020-Dec-18 02:17:31 2020-Dec-18 02:17 Alternate Designations  1932 HD = 1953 DH = 1985 CK  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 07:35 UT (server date/time)   Site Manager:   Ryan S. 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