+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1067837591022772 1.3958e-08   a 2.621411626058114 9.0235e-09 au q 2.341487438473215 3.5969e-08 au i 15.92421874511945 5.0212e-07 deg node 39.73989607295825 2.4786e-06 deg peri 17.31674248865381 7.5247e-06 deg M 65.45611302561669 5.8318e-06 deg tp 2458918.629925684112 (2020-Mar-10.12992568) 2.4801e-05 TDB period 1550.248281837444 4.24 8.0045e-06 2.192e-08 d yr n .232220866952555 1.199e-09 deg/d Q 2.901335813643012 9.9871e-09 au   Orbit Determination Parameters    # obs. used (total)      2376      data-arc span      14383 days (39.38 yr)      first obs. used      1981-10-23      last obs. used      2021-03-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41123      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 23:57:59   Additional Information  Earth MOID = 1.35497 au   Jupiter MOID = 2.51132 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 12.78   n/a E2021B10   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 ] 2021-Apr-23 09:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin