+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100591 (1997 NW2) Classification: Main-belt Asteroid          SPK-ID: 2100591 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1027989868210885 4.1362e-08   a 3.025788332869839 2.367e-08 au q 2.714740357915749 1.2731e-07 au i 7.558503976368208 5.0473e-06 deg node 287.7743799802118 3.9389e-05 deg peri 169.7401166156916 5.0963e-05 deg M 21.42827987160875 3.0358e-05 deg tp 2459086.069695916153 (2020-Aug-24.56969592) 0.000162 TDB period 1922.455265518807 5.26 2.2559e-05 6.176e-08 d yr n .1872605342017402 2.1974e-09 deg/d Q 3.336836307823929 2.6104e-08 au   Orbit Determination Parameters    # obs. used (total)      492      data-arc span      8601 days (23.55 yr)      first obs. used      1997-07-02      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49702      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:25:44   Additional Information  Earth MOID = 1.73179 au   Jupiter MOID = 1.81668 au   T_jup = 3.224  [ 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 15.2   n/a MPO412741   diameter diameter 4.411 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.083   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100591 (1997 NW2)          Discovered 1997-Jul-02 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1997 NW2 = 2000 CF60  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-03 03:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin