+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20750 (2000 AF199) Classification: Main-belt Asteroid          SPK-ID: 2020750 [ 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 .2534342191360204 2.8034e-08   a 2.637890323192421 1.2758e-08 au q 1.969358648967686 7.6849e-08 au i 16.39200880405451 8.1769e-07 deg node 96.72765376262383 2.8522e-06 deg peri 250.4404205595768 4.156e-06 deg M 359.7977656596827 3.1132e-06 deg tp 2459201.379095244830 (2020-Dec-17.87909524) 1.3537e-05 TDB period 1564.888968127103 4.28 1.1353e-05 3.108e-08 d yr n .2300482700896387 1.6689e-09 deg/d Q 3.306421997417157 1.5992e-08 au   Orbit Determination Parameters    # obs. used (total)      1898      data-arc span      13916 days (38.10 yr)      first obs. used      1982-12-11      last obs. used      2021-01-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46609      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:30:06   Additional Information  Earth MOID = 1.02538 au   Jupiter MOID = 2.28431 au   T_jup = 3.294  [ 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 13.41   n/a E2021B10   diameter diameter 7.842 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.165   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   20750 (2000 AF199)          Discovered 2000-Jan-09 by LINEAR at Socorro Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2000 AF199 = 1998 HV123  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 21:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin