+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2717762969999118 3.5901e-08   a 2.560099804437674 7.1472e-09 au q 1.864325359637405 9.509e-08 au i 5.033130608007085 4.0509e-06 deg node 310.7733805463899 4.0805e-05 deg peri 95.56282093352033 4.1933e-05 deg M 65.61858612287247 1.0679e-05 deg tp 2458927.785556780922 (2020-Mar-19.28555678) 4.3572e-05 TDB period 1496.179746619786 4.10 6.2655e-06 1.715e-08 d yr n .2406128012448522 1.0076e-09 deg/d Q 3.255874249237944 9.0896e-09 au   Orbit Determination Parameters    # obs. used (total)      2616      data-arc span      36212 days (99.14 yr)      first obs. used      1921-11-29      last obs. used      2021-01-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42313      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:51:23   Additional Information  Earth MOID = .881189 au   Jupiter MOID = 2.18804 au   T_jup = 3.377  [ 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 12.35   n/a E2021B10   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. 2020-October); 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.] [Groezinger, S.; Montgomery, K. (2020) Minor Planet Bull. 47, 174-176.] 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 ] 2021-Mar-09 05:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin