+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20685 (1999 VX48) Classification: Main-belt Asteroid          SPK-ID: 2020685 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .136307036149529 1.3124e-08   a 2.811750111560351 1.2803e-08 au q 2.428488787460452 3.5191e-08 au i 10.26217379785702 7.6251e-07 deg node 268.131039365255 3.6581e-06 deg peri 251.5098278812629 1.0878e-05 deg M 67.27431725724024 8.6121e-06 deg tp 2458878.682018431767 (2020-Jan-30.18201843) 4.0577e-05 TDB period 1722.120388402684 4.71 1.1763e-05 3.221e-08 d yr n .2090446187295363 1.4278e-09 deg/d Q 3.195011435660251 1.4549e-08 au   Orbit Determination Parameters    # obs. used (total)      2019      data-arc span      15382 days (42.11 yr)      first obs. used      1978-06-01      last obs. used      2020-07-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45411      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:27:05   Additional Information  Earth MOID = 1.46135 au   Jupiter MOID = 1.94837 au   T_jup = 3.284  [ 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 13.24   n/a E2021B10   diameter diameter 4.701 km 0.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.349   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   20685 (1999 VX48)          Discovered 1999-Nov-03 by LINEAR at Socorro Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 VX48 = 1978 LE = 1998 QF66  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-21 15:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin