+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   970 Primula (A921 WK) Classification: Main-belt Asteroid          SPK-ID: 2000970 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2716555676350114 4.1812e-08   a 2.559813852388504 8.4611e-09 au q 1.86442616727794 1.1137e-07 au i 5.033092874029414 4.0638e-06 deg node 310.7736428892491 4.2542e-05 deg peri 95.56423976121202 4.3674e-05 deg M 17.50148301413081 1.1532e-05 deg tp 2458927.775062898504 (2020-Mar-19.27506290) 4.7645e-05 TDB period 1495.929078432947 4.10 7.4168e-06 2.031e-08 d yr n .2406531199842148 1.1932e-09 deg/d Q 3.255201537499068 1.076e-08 au   Orbit Determination Parameters    # obs. used (total)      2379      data-arc span      35861 days (98.18 yr)      first obs. used      1921-11-29      last obs. used      2020-02-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4327      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 15:42:05   Additional Information  Earth MOID = .882171 au   Jupiter MOID = 2.18769 au   T_jup = 3.378  [ 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 12.3   n/a MPO502162   diameter diameter 9.204 km 0.289 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 2.777 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Maleszewski, C.; Clark, M. (2004) Minor Planet Bull. 31, 93-94.] [Sada, P.V.; Canizales, E.D.; Armada, E.M. (2004) Minor Planet Bull. 31, 49-50.] [Clark, M. (2012) Minor Planet Bull. 39, 63-65.] geometric albedo albedo 0.229   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 970 Primula (A921 WK)          Discovered 1921-Nov-29 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A921 WK = 1929 RN = 1966 TG  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-03 12:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin