+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19920 (1978 NF) Classification: Main-belt Asteroid          SPK-ID: 2019920 [ 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 .1672712342493504 3.9035e-08   a 2.551418306635847 9.7946e-09 au q 2.124639417398481 9.8302e-08 au i 14.39338150838464 3.9014e-06 deg node 111.4916871894476 1.7829e-05 deg peri 193.5909463448938 2.205e-05 deg M 142.9925175989517 1.3833e-05 deg tp 2458609.235588083574 (2019-May-05.73558808) 5.6918e-05 TDB period 1488.575709163357 4.08 8.5717e-06 2.347e-08 d yr n .2418419149149862 1.3926e-09 deg/d Q 2.978197195873213 1.1433e-08 au   Orbit Determination Parameters    # obs. used (total)      1883      data-arc span      15565 days (42.61 yr)      first obs. used      1978-07-10      last obs. used      2021-02-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48267      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:09:12   Additional Information  Earth MOID = 1.10954 au   Jupiter MOID = 2.26251 au   T_jup = 3.377  [ 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 14.2   n/a MPO452452   diameter diameter 3.365 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.430   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19920 (1978 NF)          Discovered 1978-Jul-10 by Helin, E. F., Shoemaker, E. M. at Palomar Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1978 NF = 1998 KL50  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 01:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin