+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   13487 (1981 VN) Classification: Main-belt Asteroid          SPK-ID: 2013487 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1066550000329074 4.5644e-08   a 2.621161187847367 1.0036e-08 au q 2.34160124127125 1.2106e-07 au i 15.92502038503808 5.6681e-06 deg node 39.74666289239102 1.3154e-05 deg peri 17.32074149402625 2.6145e-05 deg M 19.00995223746743 2.123e-05 deg tp 2458918.650214662767 (2020-Mar-10.15021466) 9.1374e-05 TDB period 1550.026131224475 4.24 8.9021e-06 2.437e-08 d yr n .2322541489772243 1.3339e-09 deg/d Q 2.900721134423483 1.1106e-08 au   Orbit Determination Parameters    # obs. used (total)      1906      data-arc span      13984 days (38.29 yr)      first obs. used      1981-10-23      last obs. used      2020-02-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42823      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 20:39:21   Additional Information  Earth MOID = 1.35592 au   Jupiter MOID = 2.51096 au   T_jup = 3.342  [ 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 12.8   n/a MPO502271   diameter diameter 8.892 km 0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   geometric albedo albedo 0.223   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   13487 (1981 VN)          Discovered 1981-Nov-02 by Skiff, B. A. at Anderson Mesa Reference: 20000222/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1981 VN = 1992 HF5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-13 06:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin