+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1564797158840371 1.4356e-08   a 3.125442530870809 1.1688e-08 au q 2.636374171628259 4.7409e-08 au i 1.030094767526772 1.2872e-06 deg node 163.0284179100147 4.7075e-05 deg peri 235.0694117617285 4.5269e-05 deg M 10.50465821342433 6.6043e-06 deg tp 2459337.609515253550 (2021-May-03.10951525) 3.7047e-05 TDB period 2018.206978084148 5.53 1.1321e-05 3.1e-08 d yr n .1783761546309499 1.0006e-09 deg/d Q 3.614510890113359 1.3517e-08 au   Orbit Determination Parameters    # obs. used (total)      3167      data-arc span      25101 days (68.72 yr)      first obs. used      1952-05-24      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46365      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 12:55:11   Additional Information  Earth MOID = 1.64344 au   Jupiter MOID = 1.80608 au   T_jup = 3.196  [ 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 12.43   n/a E2021B10   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-Jul-28 05:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin