+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1723390187144444 4.8076e-08   a 1.926325135783291 4.0852e-09 au q 1.59434415215743 9.2696e-08 au i 19.0874388779627 4.2464e-06 deg node 273.7481234213623 1.432e-05 deg peri 109.0038921934787 1.8028e-05 deg M 354.5933610146969 1.0694e-05 deg tp 2459015.166202770218 (2020-Jun-14.66620277) 2.9019e-05 TDB period 976.5462446504355 2.67 3.1064e-06 8.505e-09 d yr n .3686461362911345 1.1727e-09 deg/d Q 2.258306119409152 4.7892e-09 au   Orbit Determination Parameters    # obs. used (total)      3182      data-arc span      25586 days (70.05 yr)      first obs. used      1950-07-15      last obs. used      2020-08-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .29755      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:40:14   Additional Information  Earth MOID = .694251 au   Jupiter MOID = 3.23501 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 14.1   n/a MPO492770   rotation period rot_per 375. h n/a LCDB (Rev. 2019-August); 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 ] 2020-Sep-22 03:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin