+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1972 Yi Xing (1964 VQ1) Classification: Main-belt Asteroid          SPK-ID: 2001972 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .165914372231177 2.617e-08   a 2.419730462969747 6.0984e-09 au q 2.018262402237466 6.5027e-08 au i 4.118804914057907 3.1421e-06 deg node 46.47083118297682 5.0242e-05 deg peri 33.41620275905788 5.1524e-05 deg M 261.86084205419 1.2483e-05 deg tp 2459375.290644456561 (2021-Jun-09.79064446) 4.8049e-05 TDB period 1374.829729829799 3.76 5.1974e-06 1.423e-08 d yr n .2618506075254622 9.899e-10 deg/d Q 2.821198523702027 7.1102e-09 au   Orbit Determination Parameters    # obs. used (total)      2465      data-arc span      25923 days (70.97 yr)      first obs. used      1949-11-26      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44244      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:03:45   Additional Information  Earth MOID = 1.03531 au   Jupiter MOID = 2.42238 au   T_jup = 3.492  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.3   n/a MPO492773   magnitude slope G 0.21   n/a PDS3 (MPC 17264) Fit diameter diameter 6.003 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 14.183 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: [Binzel, R.P.; Cochran, A.L.; Barker, E.S.; Tholen, D.J.; et al. (1987) Icarus 71, 148-158.] geometric albedo albedo 0.243   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.888   0.041 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=17.08, mean=20.82, max.=27.41) deg. U-B UB 0.467   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=17.08, mean=17.52, max.=17.96) deg. 1972 Yi Xing (1964 VQ1)          Discovered 1964-Nov-09 by Purple Mountain Observatory at Nanking Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1964 VQ1 = 1949 WO = 1973 DK  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-18 11:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin