+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   904 Rockefellia (A918 UC) Classification: Main-belt Asteroid          SPK-ID: 2000904 [ 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 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08588302144860503 3.159e-08   a 2.998768919006289 1.2027e-08 au q 2.741225583615861 9.2843e-08 au i 15.14600641119358 4.2605e-06 deg node 197.9508161759494 1.3116e-05 deg peri 252.0804847377334 2.7991e-05 deg M 215.7281633382795 2.5638e-05 deg tp 2459960.637202328363 (2023-Jan-16.13720233) 0.00013655 TDB period 1896.762383914516 5.19 1.1411e-05 3.124e-08 d yr n .1897971000758862 1.1418e-09 deg/d Q 3.256312254396716 1.306e-08 au   Orbit Determination Parameters    # obs. used (total)      3015      data-arc span      39089 days (107.02 yr)      first obs. used      1913-10-31      last obs. used      2020-11-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43508      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:57:00   Additional Information  Earth MOID = 1.80023 au   Jupiter MOID = 2.02088 au   T_jup = 3.195  [ hide covariance matrix ] Orbital Elements at Epoch 2456146.5 (2012-Aug-07.0) TDB Reference: JPL 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09021725811556529 3.1747e-08   q 2.724249275112398 9.4095e-08 au tp 2456170.989333365456 (2012-Aug-31.48933337) 0.00012348 TDB node 198.1819095528384 1.3104e-05 deg peri 251.1791597504417 2.6839e-05 deg i 15.16339360465764 4.2646e-06 deg   Orbit Determination Parameters    # obs. used (total)      3015      data-arc span      39089 days (107.02 yr)      first obs. used      1913-10-31      last obs. used      2020-11-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43508      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:57:00   Additional Information  Jupiter MOID = 2.02088 au   T_jup = 3.195  Orbit Covariance (6×6)   e q tp node peri i e 1.007857660866045E-15 -2.967642060246458E-15 -5.129727878409825E-13 -2.372084603045615E-15 -9.71473985931575E-14 -3.680470293704683E-16 q -2.967642060246458E-15 8.853842858585917E-15 1.831748460720774E-12 6.309725866007574E-15 3.450306150534011E-13 9.255650180562799E-16 tp -5.129727878409825E-13 1.831748460720774E-12 1.52465142767795E-8 1.071745893733828E-11 2.904239771402474E-9 2.635660092596935E-13 node -2.372084603045615E-15 6.309725866007574E-15 1.071745893733828E-11 1.717153513626911E-10 -1.635034167907749E-10 1.877196869204029E-12 peri -9.71473985931575E-14 3.450306150534011E-13 2.904239771402474E-9 -1.635034167907749E-10 7.20348401426539E-10 -1.729828416006299E-12 i -3.680470293704683E-16 9.255650180562799E-16 2.635660092596935E-13 1.877196869204029E-12 -1.729828416006299E-12 1.818659020203656E-11 [ 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 10.45   n/a E2021B10   diameter diameter 49.146 km 0.763 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 6.826 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: [Polakis, T. (2018) Minor Planet Bull. 45, 199-203.] [Polakis, T. (2020) Minor Planet Bull. 47, 314-321.] geometric albedo albedo 0.055   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   904 Rockefellia (A918 UC)          Discovered 1918-Oct-29 by Wolf, M. 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 2066-May-02 02:23 < 00:01 Europ 0.0381391102050996 0.0381373804595601 0.0381408406123549 4.10001034197695 4.10001027400711 2475772.599399976 0.725192440043092 278.452151502249 28.0582910508141 72.8853645335062 194307.712863031 T 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57 2086-Jan-23 21:58 00:01 Eunom 0.0400299399777592 0.0400253311986138 0.0400345497058101 6.22222075608011 6.22222069972108 2482979.415093140 1.42759151524556 385.055629063169 24.8075273166559 -53.5301056239574 194254.166303043 T 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57 Alternate Designations  A918 UC = 1949 UK = 1961 AK = A913 UD = A916 KC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-08 00:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin