+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1898 Cowell (1971 UF1) Classification: Main-belt Asteroid          SPK-ID: 2001898 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1567232163773664 2.8882e-08   a 3.127303321760754 1.2157e-08 au q 2.637182286586787 9.196e-08 au i 1.029710328285296 3.9525e-06 deg node 163.0306002078783 0.00015727 deg peri 234.8434122868924 0.00015773 deg M 300.083655387259 1.1449e-05 deg tp 2459336.698866834853 (2021-May-02.19886683) 6.4142e-05 TDB period 2020.009612449058 5.53 1.1779e-05 3.225e-08 d yr n .1782169737120886 1.0392e-09 deg/d Q 3.617424356934722 1.4062e-08 au   Orbit Determination Parameters    # obs. used (total)      2970      data-arc span      25012 days (68.48 yr)      first obs. used      1952-05-24      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47194      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:03:20   Additional Information  Earth MOID = 1.64481 au   Jupiter MOID = 1.80187 au   T_jup = 3.195  [ 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 12.3   n/a MPO435714   diameter diameter 14.975 km 0.286 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.095   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   1898 Cowell (1971 UF1)          Discovered 1971-Oct-26 by Kohoutek, L. at Bergedorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1971 UF1 = 1960 VK  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-18 17:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin