+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1750 Eckert (1950 NA1) Classification: Mars-crossing Asteroid          SPK-ID: 2001750 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1724399076669062 3.6465e-08   a 1.926600880265328 3.7865e-09 au q 1.594378002361395 6.9274e-08 au i 19.08685403894948 3.9243e-06 deg node 273.748870878798 1.0099e-05 deg peri 109.0266533777868 1.4824e-05 deg M 68.29051684826115 1.0565e-05 deg tp 2459015.213423379669 (2020-Jun-14.71342338) 2.8523e-05 TDB period 976.7559342321398 2.67 2.8795e-06 7.884e-09 d yr n .3685669954828664 1.0866e-09 deg/d Q 2.258823758169262 4.4394e-09 au   Orbit Determination Parameters    # obs. used (total)      3636      data-arc span      25761 days (70.53 yr)      first obs. used      1950-07-15      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .29951      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:57:54   Additional Information  Earth MOID = .693615 au   Jupiter MOID = 3.23512 au   T_jup = 3.834  [ 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 13.91   n/a E2021B10   rotation period rot_per 375. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Warner, B.D. (2010) Minor Planet Bull. 37, 57-64.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] B-V BV 0.885   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=12.22, mean=12.42, max.=12.62) deg. U-B UB 0.500   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=12.22, mean=12.42, max.=12.62) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo 1750 Eckert (1950 NA1)          Discovered 1950-Jul-15 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1950 NA1 = 1950 OA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Feb-25 08:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin