+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1785 Wurm (1941 CD) Classification: Main-belt Asteroid          SPK-ID: 2001785 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06939431366133597 3.3028e-08   a 2.235733678746913 5.5446e-09 au q 2.080586474580737 7.3077e-08 au i 3.774955677705578 2.9599e-06 deg node 283.2888974378895 5.5279e-05 deg peri 246.5855240418502 5.9716e-05 deg M 236.8466716327582 2.3552e-05 deg tp 2459418.207413557829 (2021-Jul-22.70741356) 8.0277e-05 TDB period 1221.036173966838 3.34 4.5423e-06 1.244e-08 d yr n .2948315600105859 1.0968e-09 deg/d Q 2.390880882913089 5.9294e-09 au   Orbit Determination Parameters    # obs. used (total)      2852      data-arc span      32776 days (89.74 yr)      first obs. used      1931-02-21      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42871      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:02:41   Additional Information  Earth MOID = 1.08997 au   Jupiter MOID = 2.58911 au   T_jup = 3.632  [ 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 12.6   n/a MPO344311   rotation period rot_per 3.2693 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm] [Oey, J. (2009) Minor Planet Bull. 36, 4-6.] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] [Pravec, P.; Wolf, M.; Sarounova, L. (2016) http://www.asu.cas.cz/~ppravec/neo.htm] [Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.] 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) 1785 Wurm (1941 CD)          Discovered 1941-Feb-15 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1941 CD = 1931 DR = 1951 CH  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 06:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin